author | attila |
Mon, 19 Oct 2015 22:36:03 +0200 | |
changeset 33336 | 47279b2180b4 |
parent 33007 | 03119bfefbbf |
child 33337 | af3fea63e008 |
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/* |
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* Copyright (c) 2010, 2013, 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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/* |
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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file, and Oracle licenses the original version of this file under the BSD |
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* license: |
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*/ |
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/* |
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Copyright 2009-2013 Attila Szegedi |
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|
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Licensed under both the Apache License, Version 2.0 (the "Apache License") |
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and the BSD License (the "BSD License"), with licensee being free to |
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choose either of the two at their discretion. |
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|
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You may not use this file except in compliance with either the Apache |
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License or the BSD License. |
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|
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If you choose to use this file in compliance with the Apache License, the |
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following notice applies to you: |
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|
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You may obtain a copy of the Apache License at |
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|
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http://www.apache.org/licenses/LICENSE-2.0 |
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|
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Unless required by applicable law or agreed to in writing, software |
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distributed under the License is distributed on an "AS IS" BASIS, |
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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implied. See the License for the specific language governing |
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permissions and limitations under the License. |
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|
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If you choose to use this file in compliance with the BSD License, the |
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following notice applies to you: |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are |
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met: |
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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* Neither the name of the copyright holder nor the names of |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
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BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package jdk.internal.dynalink.beans; |
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import java.lang.invoke.MethodHandle; |
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import java.lang.invoke.MethodHandles; |
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import java.lang.invoke.MethodType; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.concurrent.ConcurrentHashMap; |
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import jdk.internal.dynalink.linker.LinkerServices; |
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import jdk.internal.dynalink.support.Lookup; |
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import jdk.internal.dynalink.support.TypeUtilities; |
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/** |
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* Represents a subset of overloaded methods for a certain method name on a certain class. It can be either a fixarg or |
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* a vararg subset depending on the subclass. The method is for a fixed number of arguments though (as it is generated |
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* for a concrete call site). As such, all methods in the subset can be invoked with the specified number of arguments |
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* (exactly matching for fixargs, or having less than or equal fixed arguments, for varargs). |
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*/ |
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class OverloadedMethod { |
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private final Map<ClassString, MethodHandle> argTypesToMethods = new ConcurrentHashMap<>(); |
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private final OverloadedDynamicMethod parent; |
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private final ClassLoader callSiteClassLoader; |
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private final MethodType callSiteType; |
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private final MethodHandle invoker; |
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private final LinkerServices linkerServices; |
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private final ArrayList<MethodHandle> fixArgMethods; |
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private final ArrayList<MethodHandle> varArgMethods; |
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OverloadedMethod(final List<MethodHandle> methodHandles, |
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final OverloadedDynamicMethod parent, |
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final ClassLoader callSiteClassLoader, |
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final MethodType callSiteType, |
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final LinkerServices linkerServices) { |
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this.parent = parent; |
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this.callSiteClassLoader = callSiteClassLoader; |
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final Class<?> commonRetType = getCommonReturnType(methodHandles); |
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this.callSiteType = callSiteType.changeReturnType(commonRetType); |
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this.linkerServices = linkerServices; |
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fixArgMethods = new ArrayList<>(methodHandles.size()); |
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varArgMethods = new ArrayList<>(methodHandles.size()); |
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final int argNum = callSiteType.parameterCount(); |
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for(final MethodHandle mh: methodHandles) { |
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if(mh.isVarargsCollector()) { |
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final MethodHandle asFixed = mh.asFixedArity(); |
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|
131 |
if(argNum == asFixed.type().parameterCount()) { |
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|
132 |
fixArgMethods.add(asFixed); |
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|
133 |
} |
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changeset
|
134 |
varArgMethods.add(mh); |
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|
135 |
} else { |
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changeset
|
136 |
fixArgMethods.add(mh); |
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changeset
|
137 |
} |
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changeset
|
138 |
} |
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changeset
|
139 |
fixArgMethods.trimToSize(); |
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changeset
|
140 |
varArgMethods.trimToSize(); |
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parents:
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changeset
|
141 |
|
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changeset
|
142 |
final MethodHandle bound = SELECT_METHOD.bindTo(this); |
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|
143 |
final MethodHandle collecting = SingleDynamicMethod.collectArguments(bound, argNum).asType( |
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|
144 |
callSiteType.changeReturnType(MethodHandle.class)); |
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8072596: Arrays.asList results in ClassCastException with a JS array
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|
145 |
invoker = linkerServices.asTypeLosslessReturn(MethodHandles.foldArguments( |
0008daeef352
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|
146 |
MethodHandles.exactInvoker(this.callSiteType), collecting), callSiteType); |
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|
147 |
} |
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changeset
|
148 |
|
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changeset
|
149 |
MethodHandle getInvoker() { |
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|
150 |
return invoker; |
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changeset
|
151 |
} |
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changeset
|
152 |
|
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|
153 |
private static final MethodHandle SELECT_METHOD = Lookup.findOwnSpecial(MethodHandles.lookup(), "selectMethod", |
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|
154 |
MethodHandle.class, Object[].class); |
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changeset
|
155 |
|
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|
156 |
@SuppressWarnings("unused") |
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|
157 |
private MethodHandle selectMethod(final Object[] args) throws NoSuchMethodException { |
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|
158 |
final Class<?>[] argTypes = new Class<?>[args.length]; |
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changeset
|
159 |
for(int i = 0; i < argTypes.length; ++i) { |
86cb162cec6c
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changeset
|
160 |
final Object arg = args[i]; |
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8011362: Overloaded method resolution foiled by nulls
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|
161 |
argTypes[i] = arg == null ? ClassString.NULL_CLASS : arg.getClass(); |
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changeset
|
162 |
} |
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changeset
|
163 |
final ClassString classString = new ClassString(argTypes); |
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|
164 |
MethodHandle method = argTypesToMethods.get(classString); |
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diff
changeset
|
165 |
if(method == null) { |
86cb162cec6c
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parents:
diff
changeset
|
166 |
List<MethodHandle> methods = classString.getMaximallySpecifics(fixArgMethods, linkerServices, false); |
86cb162cec6c
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attila
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diff
changeset
|
167 |
if(methods.isEmpty()) { |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
168 |
methods = classString.getMaximallySpecifics(varArgMethods, linkerServices, true); |
86cb162cec6c
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attila
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changeset
|
169 |
} |
86cb162cec6c
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attila
parents:
diff
changeset
|
170 |
switch(methods.size()) { |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
171 |
case 0: { |
86cb162cec6c
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attila
parents:
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changeset
|
172 |
method = getNoSuchMethodThrower(argTypes); |
86cb162cec6c
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attila
parents:
diff
changeset
|
173 |
break; |
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8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
174 |
} |
86cb162cec6c
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attila
parents:
diff
changeset
|
175 |
case 1: { |
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|
176 |
method = SingleDynamicMethod.getInvocation(methods.get(0), callSiteType, linkerServices); |
16234
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parents:
diff
changeset
|
177 |
break; |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
178 |
} |
86cb162cec6c
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attila
parents:
diff
changeset
|
179 |
default: { |
86cb162cec6c
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attila
parents:
diff
changeset
|
180 |
// This is unfortunate - invocation time ambiguity. We can still save the day if |
86cb162cec6c
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attila
parents:
diff
changeset
|
181 |
method = getAmbiguousMethodThrower(argTypes, methods); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
182 |
break; |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
183 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
184 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
185 |
// Avoid keeping references to unrelated classes; this ruins the performance a bit, but avoids class loader |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
186 |
// memory leaks. |
33336
47279b2180b4
8139884: Use privileged blocks when working with class loaders
attila
parents:
33007
diff
changeset
|
187 |
if(classString.isVisibleFrom(callSiteClassLoader)) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
188 |
argTypesToMethods.put(classString, method); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
189 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
190 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
191 |
return method; |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
192 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
193 |
|
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parents:
24719
diff
changeset
|
194 |
private MethodHandle getNoSuchMethodThrower(final Class<?>[] argTypes) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
195 |
return adaptThrower(MethodHandles.insertArguments(THROW_NO_SUCH_METHOD, 0, this, argTypes)); |
86cb162cec6c
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attila
parents:
diff
changeset
|
196 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
197 |
|
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
198 |
private static final MethodHandle THROW_NO_SUCH_METHOD = Lookup.findOwnSpecial(MethodHandles.lookup(), |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
199 |
"throwNoSuchMethod", void.class, Class[].class); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
200 |
|
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
201 |
@SuppressWarnings("unused") |
24778
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attila
parents:
24719
diff
changeset
|
202 |
private void throwNoSuchMethod(final Class<?>[] argTypes) throws NoSuchMethodException { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
203 |
if(varArgMethods.isEmpty()) { |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
204 |
throw new NoSuchMethodException("None of the fixed arity signatures " + getSignatureList(fixArgMethods) + |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
205 |
" of method " + parent.getName() + " match the argument types " + argTypesString(argTypes)); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
206 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
207 |
throw new NoSuchMethodException("None of the fixed arity signatures " + getSignatureList(fixArgMethods) + |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
208 |
" or the variable arity signatures " + getSignatureList(varArgMethods) + " of the method " + |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
209 |
parent.getName() + " match the argument types " + argTypesString(argTypes)); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
210 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
211 |
|
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attila
parents:
24719
diff
changeset
|
212 |
private MethodHandle getAmbiguousMethodThrower(final Class<?>[] argTypes, final List<MethodHandle> methods) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
213 |
return adaptThrower(MethodHandles.insertArguments(THROW_AMBIGUOUS_METHOD, 0, this, argTypes, methods)); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
214 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
215 |
|
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parents:
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diff
changeset
|
216 |
private MethodHandle adaptThrower(final MethodHandle rawThrower) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
217 |
return MethodHandles.dropArguments(rawThrower, 0, callSiteType.parameterList()).asType(callSiteType); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
218 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
219 |
|
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
220 |
private static final MethodHandle THROW_AMBIGUOUS_METHOD = Lookup.findOwnSpecial(MethodHandles.lookup(), |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
221 |
"throwAmbiguousMethod", void.class, Class[].class, List.class); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
222 |
|
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
223 |
@SuppressWarnings("unused") |
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parents:
24719
diff
changeset
|
224 |
private void throwAmbiguousMethod(final Class<?>[] argTypes, final List<MethodHandle> methods) throws NoSuchMethodException { |
16234
86cb162cec6c
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attila
parents:
diff
changeset
|
225 |
final String arity = methods.get(0).isVarargsCollector() ? "variable" : "fixed"; |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
226 |
throw new NoSuchMethodException("Can't unambiguously select between " + arity + " arity signatures " + |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
227 |
getSignatureList(methods) + " of the method " + parent.getName() + " for argument types " + |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
228 |
argTypesString(argTypes)); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
229 |
} |
86cb162cec6c
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attila
parents:
diff
changeset
|
230 |
|
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changeset
|
231 |
private static String argTypesString(final Class<?>[] classes) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
232 |
final StringBuilder b = new StringBuilder().append('['); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
233 |
appendTypes(b, classes, false); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
234 |
return b.append(']').toString(); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
235 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
236 |
|
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parents:
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diff
changeset
|
237 |
private static String getSignatureList(final List<MethodHandle> methods) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
238 |
final StringBuilder b = new StringBuilder().append('['); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
239 |
final Iterator<MethodHandle> it = methods.iterator(); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
240 |
if(it.hasNext()) { |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
241 |
appendSig(b, it.next()); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
242 |
while(it.hasNext()) { |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
243 |
appendSig(b.append(", "), it.next()); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
244 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
245 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
246 |
return b.append(']').toString(); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
247 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
248 |
|
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parents:
24719
diff
changeset
|
249 |
private static void appendSig(final StringBuilder b, final MethodHandle m) { |
16234
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
250 |
b.append('('); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
251 |
appendTypes(b, m.type().parameterArray(), m.isVarargsCollector()); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
252 |
b.append(')'); |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
253 |
} |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
parents:
diff
changeset
|
254 |
|
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attila
parents:
24719
diff
changeset
|
255 |
private static void appendTypes(final StringBuilder b, final Class<?>[] classes, final boolean varArg) { |
16234
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attila
parents:
diff
changeset
|
256 |
final int l = classes.length; |
86cb162cec6c
8008085: Integrate Dynalink source code into Nashorn codebase
attila
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if(!varArg) { |
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if(l > 1) { |
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b.append(classes[1].getCanonicalName()); |
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for(int i = 2; i < l; ++i) { |
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b.append(", ").append(classes[i].getCanonicalName()); |
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} |
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} |
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} else { |
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for(int i = 1; i < l - 1; ++i) { |
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b.append(classes[i].getCanonicalName()).append(", "); |
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} |
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b.append(classes[l - 1].getComponentType().getCanonicalName()).append("..."); |
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} |
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} |
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private static Class<?> getCommonReturnType(final List<MethodHandle> methodHandles) { |
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final Iterator<MethodHandle> it = methodHandles.iterator(); |
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Class<?> retType = it.next().type().returnType(); |
|
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while(it.hasNext()) { |
|
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retType = TypeUtilities.getCommonLosslessConversionType(retType, it.next().type().returnType()); |
|
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} |
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return retType; |
|
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} |
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} |