author | jrose |
Fri, 17 Aug 2012 13:42:25 -0700 | |
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parent 13423 | 17843fff200d |
child 18180 | e0b8c923f35d |
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/* |
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* Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
|
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* questions. |
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*/ |
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package java.lang.invoke; |
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import sun.invoke.util.Wrapper; |
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import java.lang.ref.WeakReference; |
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import java.lang.ref.ReferenceQueue; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.List; |
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import sun.invoke.util.BytecodeDescriptor; |
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import static java.lang.invoke.MethodHandleStatics.*; |
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import sun.invoke.util.VerifyType; |
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/** |
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* A method type represents the arguments and return type accepted and |
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* returned by a method handle, or the arguments and return type passed |
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* and expected by a method handle caller. Method types must be properly |
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* matched between a method handle and all its callers, |
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* and the JVM's operations enforce this matching at, specifically |
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* during calls to {@link MethodHandle#invokeExact MethodHandle.invokeExact} |
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* and {@link MethodHandle#invoke MethodHandle.invoke}, and during execution |
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* of {@code invokedynamic} instructions. |
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* <p> |
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* The structure is a return type accompanied by any number of parameter types. |
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* The types (primitive, {@code void}, and reference) are represented by {@link Class} objects. |
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* (For ease of exposition, we treat {@code void} as if it were a type. |
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* In fact, it denotes the absence of a return type.) |
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* <p> |
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* All instances of {@code MethodType} are immutable. |
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* Two instances are completely interchangeable if they compare equal. |
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* Equality depends on pairwise correspondence of the return and parameter types and on nothing else. |
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* <p> |
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* This type can be created only by factory methods. |
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* All factory methods may cache values, though caching is not guaranteed. |
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* Some factory methods are static, while others are virtual methods which |
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* modify precursor method types, e.g., by changing a selected parameter. |
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* <p> |
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* Factory methods which operate on groups of parameter types |
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* are systematically presented in two versions, so that both Java arrays and |
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* Java lists can be used to work with groups of parameter types. |
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* The query methods {@code parameterArray} and {@code parameterList} |
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* also provide a choice between arrays and lists. |
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* <p> |
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* {@code MethodType} objects are sometimes derived from bytecode instructions |
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* such as {@code invokedynamic}, specifically from the type descriptor strings associated |
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* with the instructions in a class file's constant pool. |
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* <p> |
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* Like classes and strings, method types can also be represented directly |
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* in a class file's constant pool as constants. |
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* A method type may be loaded by an {@code ldc} instruction which refers |
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* to a suitable {@code CONSTANT_MethodType} constant pool entry. |
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* The entry refers to a {@code CONSTANT_Utf8} spelling for the descriptor string. |
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* For more details, see the <a href="package-summary.html#mtcon">package summary</a>. |
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* <p> |
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* When the JVM materializes a {@code MethodType} from a descriptor string, |
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* all classes named in the descriptor must be accessible, and will be loaded. |
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* (But the classes need not be initialized, as is the case with a {@code CONSTANT_Class}.) |
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* This loading may occur at any time before the {@code MethodType} object is first derived. |
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* @author John Rose, JSR 292 EG |
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*/ |
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public final |
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class MethodType implements java.io.Serializable { |
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private static final long serialVersionUID = 292L; // {rtype, {ptype...}} |
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// The rtype and ptypes fields define the structural identity of the method type: |
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private final Class<?> rtype; |
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private final Class<?>[] ptypes; |
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// The remaining fields are caches of various sorts: |
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private MethodTypeForm form; // erased form, plus cached data about primitives |
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private MethodType wrapAlt; // alternative wrapped/unwrapped version |
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private Invokers invokers; // cache of handy higher-order adapters |
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/** |
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* Check the given parameters for validity and store them into the final fields. |
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*/ |
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private MethodType(Class<?> rtype, Class<?>[] ptypes) { |
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checkRtype(rtype); |
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checkPtypes(ptypes); |
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this.rtype = rtype; |
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this.ptypes = ptypes; |
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} |
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/*trusted*/ MethodTypeForm form() { return form; } |
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/*trusted*/ Class<?> rtype() { return rtype; } |
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/*trusted*/ Class<?>[] ptypes() { return ptypes; } |
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void setForm(MethodTypeForm f) { form = f; } |
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/** This number, mandated by the JVM spec as 255, |
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* is the maximum number of <em>slots</em> |
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* that any Java method can receive in its argument list. |
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* It limits both JVM signatures and method type objects. |
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* The longest possible invocation will look like |
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* {@code staticMethod(arg1, arg2, ..., arg255)} or |
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* {@code x.virtualMethod(arg1, arg2, ..., arg254)}. |
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*/ |
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/*non-public*/ static final int MAX_JVM_ARITY = 255; // this is mandated by the JVM spec. |
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/** This number is the maximum arity of a method handle, 254. |
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* It is derived from the absolute JVM-imposed arity by subtracting one, |
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* which is the slot occupied by the method handle itself at the |
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* beginning of the argument list used to invoke the method handle. |
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* The longest possible invocation will look like |
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* {@code mh.invoke(arg1, arg2, ..., arg254)}. |
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*/ |
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// Issue: Should we allow MH.invokeWithArguments to go to the full 255? |
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/*non-public*/ static final int MAX_MH_ARITY = MAX_JVM_ARITY-1; // deduct one for mh receiver |
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133 |
|
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/** This number is the maximum arity of a method handle invoker, 253. |
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* It is derived from the absolute JVM-imposed arity by subtracting two, |
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* which are the slots occupied by invoke method handle, and the the |
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* target method handle, which are both at the beginning of the argument |
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* list used to invoke the target method handle. |
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* The longest possible invocation will look like |
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* {@code invokermh.invoke(targetmh, arg1, arg2, ..., arg253)}. |
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*/ |
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/*non-public*/ static final int MAX_MH_INVOKER_ARITY = MAX_MH_ARITY-1; // deduct one more for invoker |
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143 |
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private static void checkRtype(Class<?> rtype) { |
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rtype.equals(rtype); // null check |
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} |
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private static int checkPtype(Class<?> ptype) { |
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ptype.getClass(); //NPE |
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if (ptype == void.class) |
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throw newIllegalArgumentException("parameter type cannot be void"); |
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if (ptype == double.class || ptype == long.class) return 1; |
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return 0; |
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} |
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/** Return number of extra slots (count of long/double args). */ |
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private static int checkPtypes(Class<?>[] ptypes) { |
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156 |
int slots = 0; |
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for (Class<?> ptype : ptypes) { |
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slots += checkPtype(ptype); |
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} |
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checkSlotCount(ptypes.length + slots); |
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return slots; |
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} |
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static void checkSlotCount(int count) { |
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assert((MAX_JVM_ARITY & (MAX_JVM_ARITY+1)) == 0); |
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// MAX_JVM_ARITY must be power of 2 minus 1 for following code trick to work: |
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if ((count & MAX_JVM_ARITY) != count) |
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throw newIllegalArgumentException("bad parameter count "+count); |
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} |
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169 |
private static IndexOutOfBoundsException newIndexOutOfBoundsException(Object num) { |
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if (num instanceof Integer) num = "bad index: "+num; |
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return new IndexOutOfBoundsException(num.toString()); |
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} |
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173 |
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static final WeakInternSet internTable = new WeakInternSet(); |
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175 |
|
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static final Class<?>[] NO_PTYPES = {}; |
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177 |
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/** |
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* Finds or creates an instance of the given method type. |
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* @param rtype the return type |
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* @param ptypes the parameter types |
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* @return a method type with the given components |
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* @throws NullPointerException if {@code rtype} or {@code ptypes} or any element of {@code ptypes} is null |
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* @throws IllegalArgumentException if any element of {@code ptypes} is {@code void.class} |
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185 |
*/ |
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public static |
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MethodType methodType(Class<?> rtype, Class<?>[] ptypes) { |
188 |
return makeImpl(rtype, ptypes, false); |
|
189 |
} |
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190 |
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191 |
/** |
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* Finds or creates a method type with the given components. |
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193 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* @return a method type with the given components |
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* @throws NullPointerException if {@code rtype} or {@code ptypes} or any element of {@code ptypes} is null |
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* @throws IllegalArgumentException if any element of {@code ptypes} is {@code void.class} |
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*/ |
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public static |
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MethodType methodType(Class<?> rtype, List<Class<?>> ptypes) { |
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boolean notrust = false; // random List impl. could return evil ptypes array |
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return makeImpl(rtype, listToArray(ptypes), notrust); |
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} |
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203 |
|
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private static Class<?>[] listToArray(List<Class<?>> ptypes) { |
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// sanity check the size before the toArray call, since size might be huge |
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checkSlotCount(ptypes.size()); |
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207 |
return ptypes.toArray(NO_PTYPES); |
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} |
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209 |
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210 |
/** |
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211 |
* Finds or creates a method type with the given components. |
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212 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* The leading parameter type is prepended to the remaining array. |
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* @return a method type with the given components |
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215 |
* @throws NullPointerException if {@code rtype} or {@code ptype0} or {@code ptypes} or any element of {@code ptypes} is null |
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* @throws IllegalArgumentException if {@code ptype0} or {@code ptypes} or any element of {@code ptypes} is {@code void.class} |
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*/ |
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218 |
public static |
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MethodType methodType(Class<?> rtype, Class<?> ptype0, Class<?>... ptypes) { |
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Class<?>[] ptypes1 = new Class<?>[1+ptypes.length]; |
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ptypes1[0] = ptype0; |
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System.arraycopy(ptypes, 0, ptypes1, 1, ptypes.length); |
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return makeImpl(rtype, ptypes1, true); |
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} |
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/** |
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* Finds or creates a method type with the given components. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* The resulting method has no parameter types. |
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* @return a method type with the given return value |
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* @throws NullPointerException if {@code rtype} is null |
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*/ |
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public static |
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MethodType methodType(Class<?> rtype) { |
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return makeImpl(rtype, NO_PTYPES, true); |
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} |
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/** |
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* Finds or creates a method type with the given components. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* The resulting method has the single given parameter type. |
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* @return a method type with the given return value and parameter type |
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* @throws NullPointerException if {@code rtype} or {@code ptype0} is null |
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* @throws IllegalArgumentException if {@code ptype0} is {@code void.class} |
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*/ |
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public static |
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MethodType methodType(Class<?> rtype, Class<?> ptype0) { |
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return makeImpl(rtype, new Class<?>[]{ ptype0 }, true); |
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} |
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/** |
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* Finds or creates a method type with the given components. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* The resulting method has the same parameter types as {@code ptypes}, |
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* and the specified return type. |
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* @throws NullPointerException if {@code rtype} or {@code ptypes} is null |
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*/ |
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public static |
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MethodType methodType(Class<?> rtype, MethodType ptypes) { |
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return makeImpl(rtype, ptypes.ptypes, true); |
|
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} |
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/** |
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* Sole factory method to find or create an interned method type. |
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* @param rtype desired return type |
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* @param ptypes desired parameter types |
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* @param trusted whether the ptypes can be used without cloning |
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* @return the unique method type of the desired structure |
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*/ |
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/*trusted*/ static |
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MethodType makeImpl(Class<?> rtype, Class<?>[] ptypes, boolean trusted) { |
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if (ptypes.length == 0) { |
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ptypes = NO_PTYPES; trusted = true; |
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} |
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MethodType mt1 = new MethodType(rtype, ptypes); |
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MethodType mt0 = internTable.get(mt1); |
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if (mt0 != null) |
278 |
return mt0; |
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if (!trusted) |
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// defensively copy the array passed in by the user |
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mt1 = new MethodType(rtype, ptypes.clone()); |
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// promote the object to the Real Thing, and reprobe |
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MethodTypeForm form = MethodTypeForm.findForm(mt1); |
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mt1.form = form; |
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return internTable.add(mt1); |
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} |
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private static final MethodType[] objectOnlyTypes = new MethodType[20]; |
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|
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/** |
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* Finds or creates a method type whose components are {@code Object} with an optional trailing {@code Object[]} array. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* All parameters and the return type will be {@code Object}, |
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* except the final array parameter if any, which will be {@code Object[]}. |
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* @param objectArgCount number of parameters (excluding the final array parameter if any) |
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* @param finalArray whether there will be a trailing array parameter, of type {@code Object[]} |
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* @return a generally applicable method type, for all calls of the given fixed argument count and a collected array of further arguments |
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* @throws IllegalArgumentException if {@code objectArgCount} is negative or greater than 255 (or 254, if {@code finalArray} is true) |
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* @see #genericMethodType(int) |
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*/ |
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public static |
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MethodType genericMethodType(int objectArgCount, boolean finalArray) { |
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MethodType mt; |
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checkSlotCount(objectArgCount); |
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int ivarargs = (!finalArray ? 0 : 1); |
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int ootIndex = objectArgCount*2 + ivarargs; |
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if (ootIndex < objectOnlyTypes.length) { |
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mt = objectOnlyTypes[ootIndex]; |
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if (mt != null) return mt; |
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} |
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Class<?>[] ptypes = new Class<?>[objectArgCount + ivarargs]; |
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Arrays.fill(ptypes, Object.class); |
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if (ivarargs != 0) ptypes[objectArgCount] = Object[].class; |
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mt = makeImpl(Object.class, ptypes, true); |
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if (ootIndex < objectOnlyTypes.length) { |
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objectOnlyTypes[ootIndex] = mt; // cache it here also! |
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} |
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return mt; |
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} |
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|
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/** |
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* Finds or creates a method type whose components are all {@code Object}. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* All parameters and the return type will be Object. |
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* @param objectArgCount number of parameters |
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* @return a generally applicable method type, for all calls of the given argument count |
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* @throws IllegalArgumentException if {@code objectArgCount} is negative or greater than 255 |
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* @see #genericMethodType(int, boolean) |
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*/ |
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public static |
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MethodType genericMethodType(int objectArgCount) { |
331 |
return genericMethodType(objectArgCount, false); |
|
332 |
} |
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|
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/** |
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* Finds or creates a method type with a single different parameter type. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* @param num the index (zero-based) of the parameter type to change |
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* @param nptype a new parameter type to replace the old one with |
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* @return the same type, except with the selected parameter changed |
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* @throws IndexOutOfBoundsException if {@code num} is not a valid index into {@code parameterArray()} |
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* @throws IllegalArgumentException if {@code nptype} is {@code void.class} |
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* @throws NullPointerException if {@code nptype} is null |
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*/ |
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public MethodType changeParameterType(int num, Class<?> nptype) { |
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if (parameterType(num) == nptype) return this; |
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346 |
checkPtype(nptype); |
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Class<?>[] nptypes = ptypes.clone(); |
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nptypes[num] = nptype; |
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return makeImpl(rtype, nptypes, true); |
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} |
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|
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352 |
/** |
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353 |
* Finds or creates a method type with additional parameter types. |
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354 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
4537 | 355 |
* @param num the position (zero-based) of the inserted parameter type(s) |
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* @param ptypesToInsert zero or more new parameter types to insert into the parameter list |
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* @return the same type, except with the selected parameter(s) inserted |
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358 |
* @throws IndexOutOfBoundsException if {@code num} is negative or greater than {@code parameterCount()} |
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* @throws IllegalArgumentException if any element of {@code ptypesToInsert} is {@code void.class} |
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* or if the resulting method type would have more than 255 parameter slots |
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361 |
* @throws NullPointerException if {@code ptypesToInsert} or any of its elements is null |
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*/ |
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public MethodType insertParameterTypes(int num, Class<?>... ptypesToInsert) { |
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int len = ptypes.length; |
4537 | 365 |
if (num < 0 || num > len) |
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366 |
throw newIndexOutOfBoundsException(num); |
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|
367 |
int ins = checkPtypes(ptypesToInsert); |
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|
368 |
checkSlotCount(parameterSlotCount() + ptypesToInsert.length + ins); |
4537 | 369 |
int ilen = ptypesToInsert.length; |
370 |
if (ilen == 0) return this; |
|
371 |
Class<?>[] nptypes = Arrays.copyOfRange(ptypes, 0, len+ilen); |
|
372 |
System.arraycopy(nptypes, num, nptypes, num+ilen, len-num); |
|
373 |
System.arraycopy(ptypesToInsert, 0, nptypes, num, ilen); |
|
374 |
return makeImpl(rtype, nptypes, true); |
|
375 |
} |
|
376 |
||
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377 |
/** |
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378 |
* Finds or creates a method type with additional parameter types. |
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379 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* @param ptypesToInsert zero or more new parameter types to insert after the end of the parameter list |
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* @return the same type, except with the selected parameter(s) appended |
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* @throws IllegalArgumentException if any element of {@code ptypesToInsert} is {@code void.class} |
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383 |
* or if the resulting method type would have more than 255 parameter slots |
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384 |
* @throws NullPointerException if {@code ptypesToInsert} or any of its elements is null |
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385 |
*/ |
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public MethodType appendParameterTypes(Class<?>... ptypesToInsert) { |
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return insertParameterTypes(parameterCount(), ptypesToInsert); |
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} |
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|
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/** |
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391 |
* Finds or creates a method type with additional parameter types. |
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* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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* @param num the position (zero-based) of the inserted parameter type(s) |
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* @param ptypesToInsert zero or more new parameter types to insert into the parameter list |
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* @return the same type, except with the selected parameter(s) inserted |
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* @throws IndexOutOfBoundsException if {@code num} is negative or greater than {@code parameterCount()} |
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|
397 |
* @throws IllegalArgumentException if any element of {@code ptypesToInsert} is {@code void.class} |
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|
398 |
* or if the resulting method type would have more than 255 parameter slots |
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|
399 |
* @throws NullPointerException if {@code ptypesToInsert} or any of its elements is null |
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|
400 |
*/ |
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|
401 |
public MethodType insertParameterTypes(int num, List<Class<?>> ptypesToInsert) { |
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7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
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|
402 |
return insertParameterTypes(num, listToArray(ptypesToInsert)); |
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|
403 |
} |
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changeset
|
404 |
|
3b891698c4ec
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|
405 |
/** |
3b891698c4ec
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|
406 |
* Finds or creates a method type with additional parameter types. |
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|
407 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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|
408 |
* @param ptypesToInsert zero or more new parameter types to insert after the end of the parameter list |
7562
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|
409 |
* @return the same type, except with the selected parameter(s) appended |
8346
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|
410 |
* @throws IllegalArgumentException if any element of {@code ptypesToInsert} is {@code void.class} |
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|
411 |
* or if the resulting method type would have more than 255 parameter slots |
3b891698c4ec
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|
412 |
* @throws NullPointerException if {@code ptypesToInsert} or any of its elements is null |
7562
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|
413 |
*/ |
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|
414 |
public MethodType appendParameterTypes(List<Class<?>> ptypesToInsert) { |
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|
415 |
return insertParameterTypes(parameterCount(), ptypesToInsert); |
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|
416 |
} |
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|
417 |
|
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|
418 |
/** |
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|
419 |
* Finds or creates a method type with modified parameter types. |
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|
420 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
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|
421 |
* @param start the position (zero-based) of the first replaced parameter type(s) |
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|
422 |
* @param end the position (zero-based) after the last replaced parameter type(s) |
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|
423 |
* @param ptypesToInsert zero or more new parameter types to insert into the parameter list |
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|
424 |
* @return the same type, except with the selected parameter(s) replaced |
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|
425 |
* @throws IndexOutOfBoundsException if {@code start} is negative or greater than {@code parameterCount()} |
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|
426 |
* or if {@code end} is negative or greater than {@code parameterCount()} |
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|
427 |
* or if {@code start} is greater than {@code end} |
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|
428 |
* @throws IllegalArgumentException if any element of {@code ptypesToInsert} is {@code void.class} |
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|
429 |
* or if the resulting method type would have more than 255 parameter slots |
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changeset
|
430 |
* @throws NullPointerException if {@code ptypesToInsert} or any of its elements is null |
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|
431 |
*/ |
17843fff200d
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|
432 |
/*non-public*/ MethodType replaceParameterTypes(int start, int end, Class<?>... ptypesToInsert) { |
17843fff200d
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|
433 |
if (start == end) |
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changeset
|
434 |
return insertParameterTypes(start, ptypesToInsert); |
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|
435 |
int len = ptypes.length; |
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changeset
|
436 |
if (!(0 <= start && start <= end && end <= len)) |
17843fff200d
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|
437 |
throw newIndexOutOfBoundsException("start="+start+" end="+end); |
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|
438 |
int ilen = ptypesToInsert.length; |
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changeset
|
439 |
if (ilen == 0) |
17843fff200d
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diff
changeset
|
440 |
return dropParameterTypes(start, end); |
17843fff200d
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parents:
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diff
changeset
|
441 |
return dropParameterTypes(start, end).insertParameterTypes(start, ptypesToInsert); |
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|
442 |
} |
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changeset
|
443 |
|
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|
444 |
/** |
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changeset
|
445 |
* Finds or creates a method type with some parameter types omitted. |
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changeset
|
446 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
4537 | 447 |
* @param start the index (zero-based) of the first parameter type to remove |
448 |
* @param end the index (greater than {@code start}) of the first parameter type after not to remove |
|
449 |
* @return the same type, except with the selected parameter(s) removed |
|
8346
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|
450 |
* @throws IndexOutOfBoundsException if {@code start} is negative or greater than {@code parameterCount()} |
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|
451 |
* or if {@code end} is negative or greater than {@code parameterCount()} |
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|
452 |
* or if {@code start} is greater than {@code end} |
4537 | 453 |
*/ |
454 |
public MethodType dropParameterTypes(int start, int end) { |
|
455 |
int len = ptypes.length; |
|
456 |
if (!(0 <= start && start <= end && end <= len)) |
|
8346
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|
457 |
throw newIndexOutOfBoundsException("start="+start+" end="+end); |
4537 | 458 |
if (start == end) return this; |
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|
459 |
Class<?>[] nptypes; |
4537 | 460 |
if (start == 0) { |
461 |
if (end == len) { |
|
462 |
// drop all parameters |
|
463 |
nptypes = NO_PTYPES; |
|
464 |
} else { |
|
465 |
// drop initial parameter(s) |
|
466 |
nptypes = Arrays.copyOfRange(ptypes, end, len); |
|
467 |
} |
|
2707
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changeset
|
468 |
} else { |
4537 | 469 |
if (end == len) { |
470 |
// drop trailing parameter(s) |
|
471 |
nptypes = Arrays.copyOfRange(ptypes, 0, start); |
|
472 |
} else { |
|
473 |
int tail = len - end; |
|
474 |
nptypes = Arrays.copyOfRange(ptypes, 0, start + tail); |
|
475 |
System.arraycopy(ptypes, end, nptypes, start, tail); |
|
476 |
} |
|
2707
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changeset
|
477 |
} |
5a17df307cbc
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changeset
|
478 |
return makeImpl(rtype, nptypes, true); |
5a17df307cbc
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changeset
|
479 |
} |
5a17df307cbc
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changeset
|
480 |
|
8346
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|
481 |
/** |
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changeset
|
482 |
* Finds or creates a method type with a different return type. |
3b891698c4ec
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changeset
|
483 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
2707
5a17df307cbc
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changeset
|
484 |
* @param nrtype a return parameter type to replace the old one with |
5a17df307cbc
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diff
changeset
|
485 |
* @return the same type, except with the return type change |
8346
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|
486 |
* @throws NullPointerException if {@code nrtype} is null |
2707
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changeset
|
487 |
*/ |
5a17df307cbc
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changeset
|
488 |
public MethodType changeReturnType(Class<?> nrtype) { |
5a17df307cbc
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diff
changeset
|
489 |
if (returnType() == nrtype) return this; |
5a17df307cbc
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jrose
parents:
diff
changeset
|
490 |
return makeImpl(nrtype, ptypes, true); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
491 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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diff
changeset
|
492 |
|
8346
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changeset
|
493 |
/** |
3b891698c4ec
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7668
diff
changeset
|
494 |
* Reports if this type contains a primitive argument or return value. |
4537 | 495 |
* The return type {@code void} counts as a primitive. |
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jrose
parents:
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changeset
|
496 |
* @return true if any of the types are primitives |
5a17df307cbc
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jrose
parents:
diff
changeset
|
497 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
498 |
public boolean hasPrimitives() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
499 |
return form.hasPrimitives(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
500 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
501 |
|
8346
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jrose
parents:
7668
diff
changeset
|
502 |
/** |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
503 |
* Reports if this type contains a wrapper argument or return value. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
504 |
* Wrappers are types which box primitive values, such as {@link Integer}. |
9752
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
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|
505 |
* The reference type {@code java.lang.Void} counts as a wrapper, |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
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parents:
9731
diff
changeset
|
506 |
* if it occurs as a return type. |
2707
5a17df307cbc
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jrose
parents:
diff
changeset
|
507 |
* @return true if any of the types are wrappers |
5a17df307cbc
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jrose
parents:
diff
changeset
|
508 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
509 |
public boolean hasWrappers() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
510 |
return unwrap() != this; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
511 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
512 |
|
8346
3b891698c4ec
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jrose
parents:
7668
diff
changeset
|
513 |
/** |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
514 |
* Erases all reference types to {@code Object}. |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
515 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
4537 | 516 |
* All primitive types (including {@code void}) will remain unchanged. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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diff
changeset
|
517 |
* @return a version of the original type with all reference types replaced |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
518 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
519 |
public MethodType erase() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
520 |
return form.erasedType(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
521 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
522 |
|
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
523 |
/** |
13423
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twisti
parents:
13422
diff
changeset
|
524 |
* Erases all reference types to {@code Object}, and all subword types to {@code int}. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
525 |
* This is the reduced type polymorphism used by private methods |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
526 |
* such as {@link MethodHandle#invokeBasic invokeBasic}. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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13422
diff
changeset
|
527 |
* @return a version of the original type with all reference and subword types replaced |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
528 |
*/ |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
529 |
/*non-public*/ MethodType basicType() { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
530 |
return form.basicType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
531 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
532 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
533 |
/** |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
534 |
* @return a version of the original type with MethodHandle prepended as the first argument |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
535 |
*/ |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
536 |
/*non-public*/ MethodType invokerType() { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
537 |
return insertParameterTypes(0, MethodHandle.class); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
538 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
539 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
540 |
/** |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
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|
541 |
* Converts all types, both reference and primitive, to {@code Object}. |
3b891698c4ec
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|
542 |
* Convenience method for {@link #genericMethodType(int) genericMethodType}. |
4537 | 543 |
* The expression {@code type.wrap().erase()} produces the same value |
544 |
* as {@code type.generic()}. |
|
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changeset
|
545 |
* @return a version of the original type with all types replaced |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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parents:
diff
changeset
|
546 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
547 |
public MethodType generic() { |
4537 | 548 |
return genericMethodType(parameterCount()); |
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jrose
parents:
diff
changeset
|
549 |
} |
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jrose
parents:
diff
changeset
|
550 |
|
8346
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changeset
|
551 |
/** |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
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changeset
|
552 |
* Converts all primitive types to their corresponding wrapper types. |
3b891698c4ec
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changeset
|
553 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
4537 | 554 |
* All reference types (including wrapper types) will remain unchanged. |
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changeset
|
555 |
* A {@code void} return type is changed to the type {@code java.lang.Void}. |
4537 | 556 |
* The expression {@code type.wrap().erase()} produces the same value |
557 |
* as {@code type.generic()}. |
|
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changeset
|
558 |
* @return a version of the original type with all primitive types replaced |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
559 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
560 |
public MethodType wrap() { |
5a17df307cbc
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jrose
parents:
diff
changeset
|
561 |
return hasPrimitives() ? wrapWithPrims(this) : this; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
562 |
} |
5a17df307cbc
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jrose
parents:
diff
changeset
|
563 |
|
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
564 |
/** |
8822
8145ab9f5f86
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
8821
diff
changeset
|
565 |
* Converts all wrapper types to their corresponding primitive types. |
8346
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jrose
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changeset
|
566 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
4537 | 567 |
* All primitive types (including {@code void}) will remain unchanged. |
2763 | 568 |
* A return type of {@code java.lang.Void} is changed to {@code void}. |
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jrose
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changeset
|
569 |
* @return a version of the original type with all wrapper types replaced |
5a17df307cbc
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jrose
parents:
diff
changeset
|
570 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
571 |
public MethodType unwrap() { |
5a17df307cbc
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jrose
parents:
diff
changeset
|
572 |
MethodType noprims = !hasPrimitives() ? this : wrapWithPrims(this); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
573 |
return unwrapWithNoPrims(noprims); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
574 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
575 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
576 |
private static MethodType wrapWithPrims(MethodType pt) { |
5a17df307cbc
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jrose
parents:
diff
changeset
|
577 |
assert(pt.hasPrimitives()); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
578 |
MethodType wt = pt.wrapAlt; |
5a17df307cbc
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jrose
parents:
diff
changeset
|
579 |
if (wt == null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
580 |
// fill in lazily |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
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parents:
8348
diff
changeset
|
581 |
wt = MethodTypeForm.canonicalize(pt, MethodTypeForm.WRAP, MethodTypeForm.WRAP); |
2707
5a17df307cbc
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jrose
parents:
diff
changeset
|
582 |
assert(wt != null); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
583 |
pt.wrapAlt = wt; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
584 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
585 |
return wt; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
586 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
587 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
588 |
private static MethodType unwrapWithNoPrims(MethodType wt) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
589 |
assert(!wt.hasPrimitives()); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
590 |
MethodType uwt = wt.wrapAlt; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
591 |
if (uwt == null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
592 |
// fill in lazily |
8821
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6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
593 |
uwt = MethodTypeForm.canonicalize(wt, MethodTypeForm.UNWRAP, MethodTypeForm.UNWRAP); |
2707
5a17df307cbc
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jrose
parents:
diff
changeset
|
594 |
if (uwt == null) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
595 |
uwt = wt; // type has no wrappers or prims at all |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
596 |
wt.wrapAlt = uwt; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
597 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
598 |
return uwt; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
599 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
600 |
|
8346
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jrose
parents:
7668
diff
changeset
|
601 |
/** |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
602 |
* Returns the parameter type at the specified index, within this method type. |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
603 |
* @param num the index (zero-based) of the desired parameter type |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
604 |
* @return the selected parameter type |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
605 |
* @throws IndexOutOfBoundsException if {@code num} is not a valid index into {@code parameterArray()} |
2707
5a17df307cbc
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jrose
parents:
diff
changeset
|
606 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
607 |
public Class<?> parameterType(int num) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
608 |
return ptypes[num]; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
609 |
} |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
610 |
/** |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
611 |
* Returns the number of parameter types in this method type. |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
612 |
* @return the number of parameter types |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
613 |
*/ |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
614 |
public int parameterCount() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
615 |
return ptypes.length; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
616 |
} |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
617 |
/** |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
618 |
* Returns the return type of this method type. |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
619 |
* @return the return type |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
620 |
*/ |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
621 |
public Class<?> returnType() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
622 |
return rtype; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
623 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
624 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
625 |
/** |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
626 |
* Presents the parameter types as a list (a convenience method). |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
627 |
* The list will be immutable. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
628 |
* @return the parameter types (as an immutable list) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
629 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
630 |
public List<Class<?>> parameterList() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
631 |
return Collections.unmodifiableList(Arrays.asList(ptypes)); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
632 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
633 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
634 |
/*non-public*/ Class<?> lastParameterType() { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
635 |
int len = ptypes.length; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
636 |
return len == 0 ? void.class : ptypes[len-1]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
637 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
638 |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
639 |
/** |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
640 |
* Presents the parameter types as an array (a convenience method). |
4537 | 641 |
* Changes to the array will not result in changes to the type. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
642 |
* @return the parameter types (as a fresh copy if necessary) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
643 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
644 |
public Class<?>[] parameterArray() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
645 |
return ptypes.clone(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
646 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
647 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
648 |
/** |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
649 |
* Compares the specified object with this type for equality. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
650 |
* That is, it returns <tt>true</tt> if and only if the specified object |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
651 |
* is also a method type with exactly the same parameters and return type. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
652 |
* @param x object to compare |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
653 |
* @see Object#equals(Object) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
654 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
655 |
@Override |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
656 |
public boolean equals(Object x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
657 |
return this == x || x instanceof MethodType && equals((MethodType)x); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
658 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
659 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
660 |
private boolean equals(MethodType that) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
661 |
return this.rtype == that.rtype |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
662 |
&& Arrays.equals(this.ptypes, that.ptypes); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
663 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
664 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
665 |
/** |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
666 |
* Returns the hash code value for this method type. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
667 |
* It is defined to be the same as the hashcode of a List |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
668 |
* whose elements are the return type followed by the |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
669 |
* parameter types. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
670 |
* @return the hash code value for this method type |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
671 |
* @see Object#hashCode() |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
672 |
* @see #equals(Object) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
673 |
* @see List#hashCode() |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
674 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
675 |
@Override |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
676 |
public int hashCode() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
677 |
int hashCode = 31 + rtype.hashCode(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
678 |
for (Class<?> ptype : ptypes) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
679 |
hashCode = 31*hashCode + ptype.hashCode(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
680 |
return hashCode; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
681 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
682 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
683 |
/** |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
684 |
* Returns a string representation of the method type, |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
685 |
* of the form {@code "(PT0,PT1...)RT"}. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
686 |
* The string representation of a method type is a |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
687 |
* parenthesis enclosed, comma separated list of type names, |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
688 |
* followed immediately by the return type. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
689 |
* <p> |
7562
a0ad195efe2c
7001424: implement JSR 292 EG adjustments, November 2010
jrose
parents:
7555
diff
changeset
|
690 |
* Each type is represented by its |
a0ad195efe2c
7001424: implement JSR 292 EG adjustments, November 2010
jrose
parents:
7555
diff
changeset
|
691 |
* {@link java.lang.Class#getSimpleName simple name}. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
692 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
693 |
@Override |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
694 |
public String toString() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
695 |
StringBuilder sb = new StringBuilder(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
696 |
sb.append("("); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
697 |
for (int i = 0; i < ptypes.length; i++) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
698 |
if (i > 0) sb.append(","); |
7562
a0ad195efe2c
7001424: implement JSR 292 EG adjustments, November 2010
jrose
parents:
7555
diff
changeset
|
699 |
sb.append(ptypes[i].getSimpleName()); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
700 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
701 |
sb.append(")"); |
7562
a0ad195efe2c
7001424: implement JSR 292 EG adjustments, November 2010
jrose
parents:
7555
diff
changeset
|
702 |
sb.append(rtype.getSimpleName()); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
703 |
return sb.toString(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
704 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
705 |
|
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
706 |
|
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
707 |
/*non-public*/ |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
708 |
boolean isViewableAs(MethodType newType) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
709 |
if (!VerifyType.isNullConversion(returnType(), newType.returnType())) |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
710 |
return false; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
711 |
int argc = parameterCount(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
712 |
if (argc != newType.parameterCount()) |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
713 |
return false; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
714 |
for (int i = 0; i < argc; i++) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
715 |
if (!VerifyType.isNullConversion(newType.parameterType(i), parameterType(i))) |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
716 |
return false; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
717 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
718 |
return true; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
719 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
720 |
/*non-public*/ |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
721 |
boolean isCastableTo(MethodType newType) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
722 |
int argc = parameterCount(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
723 |
if (argc != newType.parameterCount()) |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
724 |
return false; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
725 |
return true; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
726 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
727 |
/*non-public*/ |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
728 |
boolean isConvertibleTo(MethodType newType) { |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
729 |
if (!canConvert(returnType(), newType.returnType())) |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
730 |
return false; |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
731 |
int argc = parameterCount(); |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
732 |
if (argc != newType.parameterCount()) |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
733 |
return false; |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
734 |
for (int i = 0; i < argc; i++) { |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
735 |
if (!canConvert(newType.parameterType(i), parameterType(i))) |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
736 |
return false; |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
737 |
} |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
738 |
return true; |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
739 |
} |
9731
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
740 |
/*non-public*/ |
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
741 |
static boolean canConvert(Class<?> src, Class<?> dst) { |
9752
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
742 |
// short-circuit a few cases: |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
743 |
if (src == dst || dst == Object.class) return true; |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
744 |
// the remainder of this logic is documented in MethodHandle.asType |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
745 |
if (src.isPrimitive()) { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
746 |
// can force void to an explicit null, a la reflect.Method.invoke |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
747 |
// can also force void to a primitive zero, by analogy |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
748 |
if (src == void.class) return true; //or !dst.isPrimitive()? |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
749 |
Wrapper sw = Wrapper.forPrimitiveType(src); |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
750 |
if (dst.isPrimitive()) { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
751 |
// P->P must widen |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
752 |
return Wrapper.forPrimitiveType(dst).isConvertibleFrom(sw); |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
753 |
} else { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
754 |
// P->R must box and widen |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
755 |
return dst.isAssignableFrom(sw.wrapperType()); |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
756 |
} |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
757 |
} else if (dst.isPrimitive()) { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
758 |
// any value can be dropped |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
759 |
if (dst == void.class) return true; |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
760 |
Wrapper dw = Wrapper.forPrimitiveType(dst); |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
761 |
// R->P must be able to unbox (from a dynamically chosen type) and widen |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
762 |
// For example: |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
763 |
// Byte/Number/Comparable/Object -> dw:Byte -> byte. |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
764 |
// Character/Comparable/Object -> dw:Character -> char |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
765 |
// Boolean/Comparable/Object -> dw:Boolean -> boolean |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
766 |
// This means that dw must be cast-compatible with src. |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
767 |
if (src.isAssignableFrom(dw.wrapperType())) { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
768 |
return true; |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
769 |
} |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
770 |
// The above does not work if the source reference is strongly typed |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
771 |
// to a wrapper whose primitive must be widened. For example: |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
772 |
// Byte -> unbox:byte -> short/int/long/float/double |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
773 |
// Character -> unbox:char -> int/long/float/double |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
774 |
if (Wrapper.isWrapperType(src) && |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
775 |
dw.isConvertibleFrom(Wrapper.forWrapperType(src))) { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
776 |
// can unbox from src and then widen to dst |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
777 |
return true; |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
778 |
} |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
779 |
// We have already covered cases which arise due to runtime unboxing |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
780 |
// of a reference type which covers several wrapper types: |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
781 |
// Object -> cast:Integer -> unbox:int -> long/float/double |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
782 |
// Serializable -> cast:Byte -> unbox:byte -> byte/short/int/long/float/double |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
783 |
// An marginal case is Number -> dw:Character -> char, which would be OK if there were a |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
784 |
// subclass of Number which wraps a value that can convert to char. |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
785 |
// Since there is none, we don't need an extra check here to cover char or boolean. |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
786 |
return false; |
9752
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
787 |
} else { |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
788 |
// R->R always works, since null is always valid dynamically |
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
789 |
return true; |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
790 |
} |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
791 |
} |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
792 |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
793 |
/// Queries which have to do with the bytecode architecture |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
794 |
|
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
795 |
/** Reports the number of JVM stack slots required to invoke a method |
8822
8145ab9f5f86
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
8821
diff
changeset
|
796 |
* of this type. Note that (for historical reasons) the JVM requires |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
797 |
* a second stack slot to pass long and double arguments. |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
798 |
* So this method returns {@link #parameterCount() parameterCount} plus the |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
799 |
* number of long and double parameters (if any). |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
800 |
* <p> |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
801 |
* This method is included for the benfit of applications that must |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
802 |
* generate bytecodes that process method handles and invokedynamic. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
803 |
* @return the number of JVM stack slots for this type's parameters |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
804 |
*/ |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
805 |
/*non-public*/ int parameterSlotCount() { |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
806 |
return form.parameterSlotCount(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
807 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
808 |
|
8821
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6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
809 |
/*non-public*/ Invokers invokers() { |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
810 |
Invokers inv = invokers; |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
811 |
if (inv != null) return inv; |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
812 |
invokers = inv = new Invokers(this); |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
813 |
return inv; |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
814 |
} |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
815 |
|
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
816 |
/** Reports the number of JVM stack slots which carry all parameters including and after |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
817 |
* the given position, which must be in the range of 0 to |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
818 |
* {@code parameterCount} inclusive. Successive parameters are |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
819 |
* more shallowly stacked, and parameters are indexed in the bytecodes |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
820 |
* according to their trailing edge. Thus, to obtain the depth |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
821 |
* in the outgoing call stack of parameter {@code N}, obtain |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
822 |
* the {@code parameterSlotDepth} of its trailing edge |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
823 |
* at position {@code N+1}. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
824 |
* <p> |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
825 |
* Parameters of type {@code long} and {@code double} occupy |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
826 |
* two stack slots (for historical reasons) and all others occupy one. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
827 |
* Therefore, the number returned is the number of arguments |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
828 |
* <em>including</em> and <em>after</em> the given parameter, |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
829 |
* <em>plus</em> the number of long or double arguments |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
830 |
* at or after after the argument for the given parameter. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
831 |
* <p> |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
832 |
* This method is included for the benfit of applications that must |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
833 |
* generate bytecodes that process method handles and invokedynamic. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
834 |
* @param num an index (zero-based, inclusive) within the parameter types |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
835 |
* @return the index of the (shallowest) JVM stack slot transmitting the |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
836 |
* given parameter |
8346
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7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
837 |
* @throws IllegalArgumentException if {@code num} is negative or greater than {@code parameterCount()} |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
838 |
*/ |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
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parents:
8348
diff
changeset
|
839 |
/*non-public*/ int parameterSlotDepth(int num) { |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
840 |
if (num < 0 || num > ptypes.length) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
841 |
parameterType(num); // force a range check |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
842 |
return form.parameterToArgSlot(num-1); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
843 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
844 |
|
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
845 |
/** Reports the number of JVM stack slots required to receive a return value |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
846 |
* from a method of this type. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
847 |
* If the {@link #returnType() return type} is void, it will be zero, |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
848 |
* else if the return type is long or double, it will be two, else one. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
849 |
* <p> |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
850 |
* This method is included for the benfit of applications that must |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
851 |
* generate bytecodes that process method handles and invokedynamic. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
852 |
* @return the number of JVM stack slots (0, 1, or 2) for this type's return value |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
853 |
* Will be removed for PFD. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
854 |
*/ |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8348
diff
changeset
|
855 |
/*non-public*/ int returnSlotCount() { |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
856 |
return form.returnSlotCount(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
857 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
858 |
|
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
859 |
/** |
8822
8145ab9f5f86
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
8821
diff
changeset
|
860 |
* Finds or creates an instance of a method type, given the spelling of its bytecode descriptor. |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
861 |
* Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[]) methodType}. |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
862 |
* Any class or interface name embedded in the descriptor string |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
863 |
* will be resolved by calling {@link ClassLoader#loadClass(java.lang.String)} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
864 |
* on the given loader (or if it is null, on the system class loader). |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
865 |
* <p> |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
866 |
* Note that it is possible to encounter method types which cannot be |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
867 |
* constructed by this method, because their component types are |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
868 |
* not all reachable from a common class loader. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
869 |
* <p> |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
870 |
* This method is included for the benfit of applications that must |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
871 |
* generate bytecodes that process method handles and {@code invokedynamic}. |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
872 |
* @param descriptor a bytecode-level type descriptor string "(T...)T" |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
873 |
* @param loader the class loader in which to look up the types |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
874 |
* @return a method type matching the bytecode-level type descriptor |
9752
88ab34b6da6d
7032323: code changes for JSR 292 EG adjustments to API, through Public Review
jrose
parents:
9731
diff
changeset
|
875 |
* @throws NullPointerException if the string is null |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
876 |
* @throws IllegalArgumentException if the string is not well-formed |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
877 |
* @throws TypeNotPresentException if a named type cannot be found |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
878 |
*/ |
4537 | 879 |
public static MethodType fromMethodDescriptorString(String descriptor, ClassLoader loader) |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
880 |
throws IllegalArgumentException, TypeNotPresentException |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
881 |
{ |
9731
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
882 |
if (!descriptor.startsWith("(") || // also generates NPE if needed |
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
883 |
descriptor.indexOf(')') < 0 || |
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
884 |
descriptor.indexOf('.') >= 0) |
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
885 |
throw new IllegalArgumentException("not a method descriptor: "+descriptor); |
4537 | 886 |
List<Class<?>> types = BytecodeDescriptor.parseMethod(descriptor, loader); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
887 |
Class<?> rtype = types.remove(types.size() - 1); |
9731
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
888 |
checkSlotCount(types.size()); |
d0f7a3e441c4
7044892: JSR 292: API entry points sometimes throw the wrong exceptions or doesn't throw the expected one
jrose
parents:
9646
diff
changeset
|
889 |
Class<?>[] ptypes = listToArray(types); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
890 |
return makeImpl(rtype, ptypes, true); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
891 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
892 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
893 |
/** |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
894 |
* Produces a bytecode descriptor representation of the method type. |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
895 |
* <p> |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
896 |
* Note that this is not a strict inverse of {@link #fromMethodDescriptorString fromMethodDescriptorString}. |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
897 |
* Two distinct classes which share a common name but have different class loaders |
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
898 |
* will appear identical when viewed within descriptor strings. |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
899 |
* <p> |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
900 |
* This method is included for the benfit of applications that must |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
901 |
* generate bytecodes that process method handles and {@code invokedynamic}. |
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
902 |
* {@link #fromMethodDescriptorString(java.lang.String, java.lang.ClassLoader) fromMethodDescriptorString}, |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
903 |
* because the latter requires a suitable class loader argument. |
8346
3b891698c4ec
7012650: implement JSR 292 EG adjustments through January 2010
jrose
parents:
7668
diff
changeset
|
904 |
* @return the bytecode type descriptor representation |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
905 |
*/ |
4537 | 906 |
public String toMethodDescriptorString() { |
907 |
return BytecodeDescriptor.unparse(this); |
|
908 |
} |
|
8348
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
909 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
910 |
/*non-public*/ static String toFieldDescriptorString(Class<?> cls) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
911 |
return BytecodeDescriptor.unparse(cls); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
912 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
913 |
|
8348
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
914 |
/// Serialization. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
915 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
916 |
/** |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
917 |
* There are no serializable fields for {@code MethodType}. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
918 |
*/ |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
919 |
private static final java.io.ObjectStreamField[] serialPersistentFields = { }; |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
920 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
921 |
/** |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
922 |
* Save the {@code MethodType} instance to a stream. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
923 |
* |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
924 |
* @serialData |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
925 |
* For portability, the serialized format does not refer to named fields. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
926 |
* Instead, the return type and parameter type arrays are written directly |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
927 |
* from the {@code writeObject} method, using two calls to {@code s.writeObject} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
928 |
* as follows: |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
929 |
* <blockquote><pre> |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
930 |
s.writeObject(this.returnType()); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
931 |
s.writeObject(this.parameterArray()); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
932 |
* </pre></blockquote> |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
933 |
* <p> |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
934 |
* The deserialized field values are checked as if they were |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
935 |
* provided to the factory method {@link #methodType(Class,Class[]) methodType}. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
936 |
* For example, null values, or {@code void} parameter types, |
3b2ac15dfc16
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jrose
parents:
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diff
changeset
|
937 |
* will lead to exceptions during deserialization. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
938 |
* @param the stream to write the object to |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
939 |
*/ |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
940 |
private void writeObject(java.io.ObjectOutputStream s) throws java.io.IOException { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
941 |
s.defaultWriteObject(); // requires serialPersistentFields to be an empty array |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
942 |
s.writeObject(returnType()); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
943 |
s.writeObject(parameterArray()); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
944 |
} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
945 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
946 |
/** |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
947 |
* Reconstitute the {@code MethodType} instance from a stream (that is, |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
948 |
* deserialize it). |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
949 |
* This instance is a scratch object with bogus final fields. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
950 |
* It provides the parameters to the factory method called by |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
951 |
* {@link #readResolve readResolve}. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
952 |
* After that call it is discarded. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
953 |
* @param the stream to read the object from |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
954 |
* @see #MethodType() |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
955 |
* @see #readResolve |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
956 |
* @see #writeObject |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
957 |
*/ |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
958 |
private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
959 |
s.defaultReadObject(); // requires serialPersistentFields to be an empty array |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
960 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
961 |
Class<?> returnType = (Class<?>) s.readObject(); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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changeset
|
962 |
Class<?>[] parameterArray = (Class<?>[]) s.readObject(); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
963 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
964 |
// Probably this object will never escape, but let's check |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
965 |
// the field values now, just to be sure. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
966 |
checkRtype(returnType); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
967 |
checkPtypes(parameterArray); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
968 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
969 |
parameterArray = parameterArray.clone(); // make sure it is unshared |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
970 |
MethodType_init(returnType, parameterArray); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
971 |
} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
972 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
973 |
/** |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
974 |
* For serialization only. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
975 |
* Sets the final fields to null, pending {@code Unsafe.putObject}. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
976 |
*/ |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
977 |
private MethodType() { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
978 |
this.rtype = null; |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
979 |
this.ptypes = null; |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
980 |
} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
981 |
private void MethodType_init(Class<?> rtype, Class<?>[] ptypes) { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
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diff
changeset
|
982 |
// In order to communicate these values to readResolve, we must |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
983 |
// store them into the implementation-specific final fields. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
984 |
checkRtype(rtype); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
985 |
checkPtypes(ptypes); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
986 |
UNSAFE.putObject(this, rtypeOffset, rtype); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
987 |
UNSAFE.putObject(this, ptypesOffset, ptypes); |
8348
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
988 |
} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
989 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
990 |
// Support for resetting final fields while deserializing |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
991 |
private static final long rtypeOffset, ptypesOffset; |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
992 |
static { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
993 |
try { |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
994 |
rtypeOffset = UNSAFE.objectFieldOffset |
8348
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
995 |
(MethodType.class.getDeclaredField("rtype")); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13422
diff
changeset
|
996 |
ptypesOffset = UNSAFE.objectFieldOffset |
8348
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
997 |
(MethodType.class.getDeclaredField("ptypes")); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
998 |
} catch (Exception ex) { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
999 |
throw new Error(ex); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1000 |
} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1001 |
} |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1002 |
|
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1003 |
/** |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1004 |
* Resolves and initializes a {@code MethodType} object |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1005 |
* after serialization. |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1006 |
* @return the fully initialized {@code MethodType} object |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1007 |
*/ |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1008 |
private Object readResolve() { |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1009 |
// Do not use a trusted path for deserialization: |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1010 |
//return makeImpl(rtype, ptypes, true); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1011 |
// Verify all operands, and make sure ptypes is unshared: |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1012 |
return methodType(rtype, ptypes); |
3b2ac15dfc16
7016261: JSR 292 MethodType objects should be serializable
jrose
parents:
8346
diff
changeset
|
1013 |
} |
13422 | 1014 |
|
1015 |
/** |
|
1016 |
* Weak intern set based on implementation of the <tt>HashSet</tt> and |
|
1017 |
* <tt>WeakHashMap</tt>, with <em>weak values</em>. Note: <tt>null</tt> |
|
1018 |
* values will yield <tt>NullPointerException</tt> |
|
1019 |
* Refer to implementation of WeakInternSet for details. |
|
1020 |
* |
|
1021 |
* @see java.util.HashMap |
|
1022 |
* @see java.util.HashSet |
|
1023 |
* @see java.util.WeakHashMap |
|
1024 |
* @see java.lang.ref.WeakReference |
|
1025 |
*/ |
|
1026 |
private static class WeakInternSet { |
|
1027 |
// The default initial capacity -- MUST be a power of two. |
|
1028 |
private static final int DEFAULT_INITIAL_CAPACITY = 16; |
|
1029 |
||
1030 |
// The maximum capacity, used if a higher value is implicitly specified |
|
1031 |
// by either of the constructors with arguments. |
|
1032 |
// MUST be a power of two <= 1<<30. |
|
1033 |
private static final int MAXIMUM_CAPACITY = 1 << 30; |
|
1034 |
||
1035 |
// The load factor used when none specified in constructor. |
|
1036 |
private static final float DEFAULT_LOAD_FACTOR = 0.75f; |
|
1037 |
||
1038 |
// The table, resized as necessary. Length MUST Always be a power of two. |
|
1039 |
private Entry[] table; |
|
1040 |
||
1041 |
// The number of entries contained in this set. |
|
1042 |
private int size; |
|
1043 |
||
1044 |
// The next size value at which to resize (capacity * load factor). |
|
1045 |
private int threshold; |
|
1046 |
||
1047 |
// The load factor for the hash table. |
|
1048 |
private final float loadFactor; |
|
1049 |
||
1050 |
// Reference queue for cleared WeakEntries |
|
1051 |
private final ReferenceQueue<Object> queue = new ReferenceQueue<>(); |
|
1052 |
||
1053 |
private Entry[] newTable(int n) { |
|
1054 |
return new Entry[n]; |
|
1055 |
} |
|
1056 |
||
1057 |
/** |
|
1058 |
* Constructs a new, empty <tt>WeakInternSet</tt> with the default initial |
|
1059 |
* capacity (16) and load factor (0.75). |
|
1060 |
*/ |
|
1061 |
WeakInternSet() { |
|
1062 |
this.loadFactor = DEFAULT_LOAD_FACTOR; |
|
1063 |
threshold = DEFAULT_INITIAL_CAPACITY; |
|
1064 |
table = newTable(DEFAULT_INITIAL_CAPACITY); |
|
1065 |
} |
|
1066 |
||
1067 |
/** |
|
1068 |
* Applies a supplemental hash function to a given hashCode, which |
|
1069 |
* defends against poor quality hash functions. This is critical |
|
1070 |
* because hashing uses power-of-two length hash tables, that |
|
1071 |
* otherwise encounter collisions for hashCodes that do not differ |
|
1072 |
* in lower bits. |
|
1073 |
* @param h preliminary hash code value |
|
1074 |
* @return supplemental hash code value |
|
1075 |
*/ |
|
1076 |
private static int hash(int h) { |
|
1077 |
// This function ensures that hashCodes that differ only by |
|
1078 |
// constant multiples at each bit position have a bounded |
|
1079 |
// number of collisions (approximately 8 at default load factor). |
|
1080 |
h ^= (h >>> 20) ^ (h >>> 12); |
|
1081 |
return h ^ (h >>> 7) ^ (h >>> 4); |
|
1082 |
} |
|
1083 |
||
1084 |
/** |
|
1085 |
* Checks for equality of non-null reference x and possibly-null y. By |
|
1086 |
* default uses Object.equals. |
|
1087 |
* @param x first object to compare |
|
1088 |
* @param y second object to compare |
|
1089 |
* @return <tt>true</tt> if objects are equal |
|
1090 |
*/ |
|
1091 |
private static boolean eq(Object x, Object y) { |
|
1092 |
return x == y || x.equals(y); |
|
1093 |
} |
|
1094 |
||
1095 |
/** |
|
1096 |
* Returns index for hash code h. |
|
1097 |
* @param h raw hash code |
|
1098 |
* @param length length of table (power of 2) |
|
1099 |
* @return index in table |
|
1100 |
*/ |
|
1101 |
private static int indexFor(int h, int length) { |
|
1102 |
return h & (length-1); |
|
1103 |
} |
|
1104 |
||
1105 |
/** |
|
1106 |
* Expunges stale entries from the table. |
|
1107 |
*/ |
|
1108 |
private void expungeStaleEntries() { |
|
1109 |
for (Object x; (x = queue.poll()) != null; ) { |
|
1110 |
synchronized (queue) { |
|
1111 |
Entry entry = (Entry) x; |
|
1112 |
int i = indexFor(entry.hash, table.length); |
|
1113 |
Entry prev = table[i]; |
|
1114 |
Entry p = prev; |
|
1115 |
while (p != null) { |
|
1116 |
Entry next = p.next; |
|
1117 |
if (p == entry) { |
|
1118 |
if (prev == entry) |
|
1119 |
table[i] = next; |
|
1120 |
else |
|
1121 |
prev.next = next; |
|
1122 |
entry.next = null; |
|
1123 |
size--; |
|
1124 |
break; |
|
1125 |
} |
|
1126 |
prev = p; |
|
1127 |
p = next; |
|
1128 |
} |
|
1129 |
} |
|
1130 |
} |
|
1131 |
} |
|
1132 |
||
1133 |
/** |
|
1134 |
* Returns the table after first expunging stale entries. |
|
1135 |
* @return an expunged hash table |
|
1136 |
*/ |
|
1137 |
private Entry[] getTable() { |
|
1138 |
expungeStaleEntries(); |
|
1139 |
return table; |
|
1140 |
} |
|
1141 |
||
1142 |
/** |
|
1143 |
* Returns the entry to which the specified value is mapped, |
|
1144 |
* or {@code null} if this set contains no entry for the value. |
|
1145 |
* |
|
1146 |
* <p>More formally, if this set contains an entry for value |
|
1147 |
* {@code entry} to a value {@code value} such that |
|
1148 |
* {@code entry.equals(value)}, then this method returns {@code entry}; |
|
1149 |
* otherwise it returns {@code null}. |
|
1150 |
* |
|
1151 |
* @param value value to search for in set |
|
1152 |
* @return interned value if in set, otherwise <tt>null</tt> |
|
1153 |
*/ |
|
1154 |
synchronized MethodType get(MethodType value) { |
|
1155 |
int h = hash(value.hashCode()); |
|
1156 |
Entry[] tab = getTable(); |
|
1157 |
int index = indexFor(h, tab.length); |
|
1158 |
Entry e = tab[index]; |
|
1159 |
MethodType g; |
|
1160 |
while (e != null) { |
|
1161 |
if (e.hash == h && eq(value, g = e.get())) |
|
1162 |
return g; |
|
1163 |
e = e.next; |
|
1164 |
} |
|
1165 |
return null; |
|
1166 |
} |
|
1167 |
||
1168 |
/** |
|
1169 |
* Attempts to add the specified value to the set and returns same value. |
|
1170 |
* If the set previously contained an entry for this value, the old |
|
1171 |
* value is left untouched and returned as the result. |
|
1172 |
* |
|
1173 |
* @param value value to be added |
|
1174 |
* @return the previous entry associated with <tt>value</tt>, or |
|
1175 |
* <tt>value</tt> if there was no previous entry found |
|
1176 |
*/ |
|
1177 |
synchronized MethodType add(MethodType value) { |
|
1178 |
int h = hash(value.hashCode()); |
|
1179 |
Entry[] tab = getTable(); |
|
1180 |
int i = indexFor(h, tab.length); |
|
1181 |
MethodType g; |
|
1182 |
for (Entry e = tab[i]; e != null; e = e.next) { |
|
1183 |
if (h == e.hash && eq(value, g = e.get())) { |
|
1184 |
return g; |
|
1185 |
} |
|
1186 |
} |
|
1187 |
Entry e = tab[i]; |
|
1188 |
tab[i] = new Entry(value, queue, h, e); |
|
1189 |
if (++size >= threshold) |
|
1190 |
resize(tab.length * 2); |
|
1191 |
return value; |
|
1192 |
} |
|
1193 |
||
1194 |
/** |
|
1195 |
* Rehashes the contents of this set into a new array with a |
|
1196 |
* larger capacity. This method is called automatically when the |
|
1197 |
* number of keys in this set reaches its threshold. |
|
1198 |
* |
|
1199 |
* If current capacity is MAXIMUM_CAPACITY, this method does not |
|
1200 |
* resize the set, but sets threshold to Integer.MAX_VALUE. |
|
1201 |
* This has the effect of preventing future calls. |
|
1202 |
* |
|
1203 |
* @param newCapacity the new capacity, MUST be a power of two; |
|
1204 |
* must be greater than current capacity unless current |
|
1205 |
* capacity is MAXIMUM_CAPACITY (in which case value |
|
1206 |
* is irrelevant) |
|
1207 |
*/ |
|
1208 |
private void resize(int newCapacity) { |
|
1209 |
Entry[] oldTable = getTable(); |
|
1210 |
int oldCapacity = oldTable.length; |
|
1211 |
if (oldCapacity == MAXIMUM_CAPACITY) { |
|
1212 |
threshold = Integer.MAX_VALUE; |
|
1213 |
return; |
|
1214 |
} |
|
1215 |
||
1216 |
Entry[] newTable = newTable(newCapacity); |
|
1217 |
transfer(oldTable, newTable); |
|
1218 |
table = newTable; |
|
1219 |
||
1220 |
/* |
|
1221 |
* If ignoring null elements and processing ref queue caused massive |
|
1222 |
* shrinkage, then restore old table. This should be rare, but avoids |
|
1223 |
* unbounded expansion of garbage-filled tables. |
|
1224 |
*/ |
|
1225 |
if (size >= threshold / 2) { |
|
1226 |
threshold = (int)(newCapacity * loadFactor); |
|
1227 |
} else { |
|
1228 |
expungeStaleEntries(); |
|
1229 |
transfer(newTable, oldTable); |
|
1230 |
table = oldTable; |
|
1231 |
} |
|
1232 |
} |
|
1233 |
||
1234 |
/** |
|
1235 |
* Transfers all entries from src to dest tables |
|
1236 |
* @param src original table |
|
1237 |
* @param dest new table |
|
1238 |
*/ |
|
1239 |
private void transfer(Entry[] src, Entry[] dest) { |
|
1240 |
for (int j = 0; j < src.length; ++j) { |
|
1241 |
Entry e = src[j]; |
|
1242 |
src[j] = null; |
|
1243 |
while (e != null) { |
|
1244 |
Entry next = e.next; |
|
1245 |
MethodType key = e.get(); |
|
1246 |
if (key == null) { |
|
1247 |
e.next = null; // Help GC |
|
1248 |
size--; |
|
1249 |
} else { |
|
1250 |
int i = indexFor(e.hash, dest.length); |
|
1251 |
e.next = dest[i]; |
|
1252 |
dest[i] = e; |
|
1253 |
} |
|
1254 |
e = next; |
|
1255 |
} |
|
1256 |
} |
|
1257 |
} |
|
1258 |
||
1259 |
/** |
|
1260 |
* The entries in this hash table extend WeakReference, using its main ref |
|
1261 |
* field as the key. |
|
1262 |
*/ |
|
1263 |
private static class Entry extends WeakReference<MethodType> { |
|
1264 |
final int hash; |
|
1265 |
Entry next; |
|
1266 |
||
1267 |
/** |
|
1268 |
* Creates new entry. |
|
1269 |
*/ |
|
1270 |
Entry(MethodType key, |
|
1271 |
ReferenceQueue<Object> queue, |
|
1272 |
int hash, Entry next) { |
|
1273 |
super(key, queue); |
|
1274 |
this.hash = hash; |
|
1275 |
this.next = next; |
|
1276 |
} |
|
1277 |
} |
|
1278 |
} |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
1279 |
} |