author | jrose |
Fri, 30 Apr 2010 23:48:23 -0700 | |
changeset 5722 | 4ada807383c8 |
parent 4537 | 7c3c7f8d5195 |
child 5725 | 16c1792b2ee6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2008-2009 Sun Microsystems, Inc. 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. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package sun.dyn.util; |
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import java.dyn.*; |
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import java.dyn.MethodHandles.Lookup; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.EnumMap; |
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import java.util.List; |
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import sun.dyn.Access; |
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import sun.dyn.AdapterMethodHandle; |
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import sun.dyn.MethodHandleImpl; |
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public class ValueConversions { |
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private static final Access IMPL_TOKEN = Access.getToken(); |
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private static final Lookup IMPL_LOOKUP = MethodHandleImpl.getLookup(IMPL_TOKEN); |
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private static EnumMap<Wrapper, MethodHandle>[] newWrapperCaches(int n) { |
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@SuppressWarnings("unchecked") |
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EnumMap<Wrapper, MethodHandle>[] caches |
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= (EnumMap<Wrapper, MethodHandle>[]) new EnumMap[n]; // unchecked warning expected here |
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for (int i = 0; i < n; i++) |
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caches[i] = new EnumMap<Wrapper, MethodHandle>(Wrapper.class); |
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return caches; |
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} |
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/// Converting references to values. |
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static int unboxInteger(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Integer) x).intValue(); |
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} |
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static byte unboxByte(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Byte) x).byteValue(); |
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} |
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static short unboxShort(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Short) x).shortValue(); |
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} |
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static boolean unboxBoolean(Object x) { |
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if (x == null) return false; // never NPE |
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return ((Boolean) x).booleanValue(); |
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} |
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static char unboxCharacter(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Character) x).charValue(); |
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} |
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static long unboxLong(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Long) x).longValue(); |
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} |
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static float unboxFloat(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Float) x).floatValue(); |
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} |
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static double unboxDouble(Object x) { |
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if (x == null) return 0; // never NPE |
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return ((Double) x).doubleValue(); |
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} |
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/// Converting references to "raw" values. |
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/// A raw primitive value is always an int or long. |
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static int unboxByteRaw(Object x) { |
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return unboxByte(x); |
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} |
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static int unboxShortRaw(Object x) { |
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return unboxShort(x); |
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} |
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static int unboxBooleanRaw(Object x) { |
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return unboxBoolean(x) ? 1 : 0; |
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} |
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static int unboxCharacterRaw(Object x) { |
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return unboxCharacter(x); |
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} |
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static int unboxFloatRaw(Object x) { |
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return Float.floatToIntBits(unboxFloat(x)); |
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} |
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static long unboxDoubleRaw(Object x) { |
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return Double.doubleToRawLongBits(unboxDouble(x)); |
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} |
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private static MethodType unboxType(Wrapper wrap, boolean raw) { |
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return MethodType.methodType(rawWrapper(wrap, raw).primitiveType(), wrap.wrapperType()); |
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} |
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private static final EnumMap<Wrapper, MethodHandle>[] |
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UNBOX_CONVERSIONS = newWrapperCaches(4); |
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private static MethodHandle unbox(Wrapper wrap, boolean exact, boolean raw) { |
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EnumMap<Wrapper, MethodHandle> cache = UNBOX_CONVERSIONS[(exact?1:0)+(raw?2:0)]; |
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MethodHandle mh = cache.get(wrap); |
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if (mh != null) { |
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return mh; |
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} |
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// slow path |
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switch (wrap) { |
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case OBJECT: |
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mh = IDENTITY; break; |
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case VOID: |
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mh = raw ? ALWAYS_ZERO : IGNORE; break; |
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case INT: case LONG: |
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// these guys don't need separate raw channels |
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141 |
if (raw) mh = unbox(wrap, exact, false); |
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|
142 |
break; |
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6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
143 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
144 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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parents:
diff
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|
145 |
cache.put(wrap, mh); |
5a17df307cbc
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parents:
diff
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|
146 |
return mh; |
5a17df307cbc
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diff
changeset
|
147 |
} |
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|
148 |
// look up the method |
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|
149 |
String name = "unbox" + wrap.simpleName() + (raw ? "Raw" : ""); |
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|
150 |
MethodType type = unboxType(wrap, raw); |
5a17df307cbc
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|
151 |
if (!exact) |
5a17df307cbc
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|
152 |
// actually, type is wrong; the Java method takes Object |
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|
153 |
mh = IMPL_LOOKUP.findStatic(ValueConversions.class, name, type.erase()); |
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|
154 |
else |
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|
155 |
mh = retype(type, unbox(wrap, !exact, raw)); |
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|
156 |
if (mh != null) { |
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|
157 |
cache.put(wrap, mh); |
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diff
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|
158 |
return mh; |
5a17df307cbc
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diff
changeset
|
159 |
} |
5a17df307cbc
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|
160 |
throw new IllegalArgumentException("cannot find unbox adapter for " + wrap + (raw ? " (raw)" : "")); |
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|
161 |
} |
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changeset
|
162 |
|
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|
163 |
public static MethodHandle unbox(Wrapper type, boolean exact) { |
5a17df307cbc
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|
164 |
return unbox(type, exact, false); |
5a17df307cbc
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diff
changeset
|
165 |
} |
5a17df307cbc
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jrose
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changeset
|
166 |
|
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|
167 |
public static MethodHandle unboxRaw(Wrapper type, boolean exact) { |
5a17df307cbc
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|
168 |
return unbox(type, exact, true); |
5a17df307cbc
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diff
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|
169 |
} |
5a17df307cbc
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changeset
|
170 |
|
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|
171 |
public static MethodHandle unbox(Class<?> type, boolean exact) { |
5a17df307cbc
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|
172 |
return unbox(Wrapper.forPrimitiveType(type), exact, false); |
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|
173 |
} |
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changeset
|
174 |
|
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|
175 |
public static MethodHandle unboxRaw(Class<?> type, boolean exact) { |
5a17df307cbc
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|
176 |
return unbox(Wrapper.forPrimitiveType(type), exact, true); |
5a17df307cbc
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|
177 |
} |
5a17df307cbc
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jrose
parents:
diff
changeset
|
178 |
|
5a17df307cbc
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diff
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|
179 |
/// Converting primitives to references |
5a17df307cbc
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|
180 |
|
5a17df307cbc
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|
181 |
static Integer boxInteger(int x) { |
5a17df307cbc
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|
182 |
return x; |
5a17df307cbc
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jrose
parents:
diff
changeset
|
183 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
184 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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parents:
diff
changeset
|
185 |
static Byte boxByte(byte x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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parents:
diff
changeset
|
186 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
187 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
188 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
189 |
static Short boxShort(short x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
190 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
191 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
192 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
193 |
static Boolean boxBoolean(boolean x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
194 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
195 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
196 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
197 |
static Character boxCharacter(char x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
198 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
199 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
200 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
201 |
static Long boxLong(long x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
202 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
203 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
204 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
205 |
static Float boxFloat(float x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
206 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
207 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
208 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
209 |
static Double boxDouble(double x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
210 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
211 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
212 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
213 |
/// Converting raw primitives to references |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
214 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
215 |
static Byte boxByteRaw(int x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
216 |
return boxByte((byte)x); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
217 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
218 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
219 |
static Short boxShortRaw(int x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
220 |
return boxShort((short)x); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
221 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
222 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
223 |
static Boolean boxBooleanRaw(int x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
224 |
return boxBoolean(x != 0); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
225 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
226 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
227 |
static Character boxCharacterRaw(int x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
228 |
return boxCharacter((char)x); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
229 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
230 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
231 |
static Float boxFloatRaw(int x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
232 |
return boxFloat(Float.intBitsToFloat(x)); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
233 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
234 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
235 |
static Double boxDoubleRaw(long x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
236 |
return boxDouble(Double.longBitsToDouble(x)); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
237 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
238 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
239 |
// a raw void value is (arbitrarily) a garbage int |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
240 |
static Void boxVoidRaw(int x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
241 |
return null; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
242 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
243 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
244 |
private static MethodType boxType(Wrapper wrap, boolean raw) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
245 |
// be exact, since return casts are hard to compose |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
246 |
Class<?> boxType = wrap.wrapperType(); |
4537 | 247 |
return MethodType.methodType(boxType, rawWrapper(wrap, raw).primitiveType()); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
248 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
249 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
250 |
private static Wrapper rawWrapper(Wrapper wrap, boolean raw) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
251 |
if (raw) return wrap.isDoubleWord() ? Wrapper.LONG : Wrapper.INT; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
252 |
return wrap; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
253 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
254 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
255 |
private static final EnumMap<Wrapper, MethodHandle>[] |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
256 |
BOX_CONVERSIONS = newWrapperCaches(4); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
257 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
258 |
private static MethodHandle box(Wrapper wrap, boolean exact, boolean raw) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
259 |
EnumMap<Wrapper, MethodHandle> cache = BOX_CONVERSIONS[(exact?1:0)+(raw?2:0)]; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
260 |
MethodHandle mh = cache.get(wrap); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
261 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
262 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
263 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
264 |
// slow path |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
265 |
switch (wrap) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
266 |
case OBJECT: |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
267 |
mh = IDENTITY; break; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
268 |
case VOID: |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
269 |
if (!raw) mh = ZERO_OBJECT; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
270 |
break; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
271 |
case INT: case LONG: |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
272 |
// these guys don't need separate raw channels |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
273 |
if (raw) mh = box(wrap, exact, false); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
274 |
break; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
275 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
276 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
277 |
cache.put(wrap, mh); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
278 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
279 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
280 |
// look up the method |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
281 |
String name = "box" + wrap.simpleName() + (raw ? "Raw" : ""); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
282 |
MethodType type = boxType(wrap, raw); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
283 |
if (exact) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
284 |
mh = IMPL_LOOKUP.findStatic(ValueConversions.class, name, type); |
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285 |
else |
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286 |
mh = retype(type.erase(), box(wrap, !exact, raw)); |
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287 |
if (mh != null) { |
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288 |
cache.put(wrap, mh); |
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289 |
return mh; |
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290 |
} |
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291 |
throw new IllegalArgumentException("cannot find box adapter for " + wrap + (raw ? " (raw)" : "")); |
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292 |
} |
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293 |
|
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294 |
public static MethodHandle box(Class<?> type, boolean exact) { |
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295 |
return box(Wrapper.forPrimitiveType(type), exact, false); |
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296 |
} |
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|
297 |
|
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298 |
public static MethodHandle boxRaw(Class<?> type, boolean exact) { |
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299 |
return box(Wrapper.forPrimitiveType(type), exact, true); |
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300 |
} |
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301 |
|
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|
302 |
public static MethodHandle box(Wrapper type, boolean exact) { |
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303 |
return box(type, exact, false); |
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|
304 |
} |
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|
305 |
|
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|
306 |
public static MethodHandle boxRaw(Wrapper type, boolean exact) { |
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|
307 |
return box(type, exact, true); |
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|
308 |
} |
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|
309 |
|
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310 |
/// Kludges for when raw values get accidentally boxed. |
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311 |
|
4537 | 312 |
static int unboxRawInteger(Object x) { |
313 |
if (x instanceof Integer) |
|
314 |
return unboxInteger(x); |
|
315 |
else |
|
316 |
return (int) unboxLong(x); |
|
317 |
} |
|
318 |
||
319 |
static Integer reboxRawInteger(Object x) { |
|
320 |
if (x instanceof Integer) |
|
321 |
return (Integer) x; |
|
322 |
else |
|
323 |
return (int) unboxLong(x); |
|
324 |
} |
|
325 |
||
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326 |
static Byte reboxRawByte(Object x) { |
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327 |
if (x instanceof Byte) return (Byte) x; |
4537 | 328 |
return boxByteRaw(unboxRawInteger(x)); |
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329 |
} |
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|
330 |
|
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|
331 |
static Short reboxRawShort(Object x) { |
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|
332 |
if (x instanceof Short) return (Short) x; |
4537 | 333 |
return boxShortRaw(unboxRawInteger(x)); |
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|
334 |
} |
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|
335 |
|
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|
336 |
static Boolean reboxRawBoolean(Object x) { |
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|
337 |
if (x instanceof Boolean) return (Boolean) x; |
4537 | 338 |
return boxBooleanRaw(unboxRawInteger(x)); |
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|
339 |
} |
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|
340 |
|
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|
341 |
static Character reboxRawCharacter(Object x) { |
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|
342 |
if (x instanceof Character) return (Character) x; |
4537 | 343 |
return boxCharacterRaw(unboxRawInteger(x)); |
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|
344 |
} |
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|
345 |
|
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|
346 |
static Float reboxRawFloat(Object x) { |
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|
347 |
if (x instanceof Float) return (Float) x; |
4537 | 348 |
return boxFloatRaw(unboxRawInteger(x)); |
349 |
} |
|
350 |
||
351 |
static Long reboxRawLong(Object x) { |
|
352 |
return (Long) x; //never a rebox |
|
2707
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|
353 |
} |
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|
354 |
|
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|
355 |
static Double reboxRawDouble(Object x) { |
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|
356 |
if (x instanceof Double) return (Double) x; |
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|
357 |
return boxDoubleRaw(unboxLong(x)); |
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|
358 |
} |
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changeset
|
359 |
|
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|
360 |
private static MethodType reboxType(Wrapper wrap) { |
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|
361 |
Class<?> boxType = wrap.wrapperType(); |
4537 | 362 |
return MethodType.methodType(boxType, Object.class); |
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|
363 |
} |
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|
364 |
|
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|
365 |
private static final EnumMap<Wrapper, MethodHandle>[] |
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|
366 |
REBOX_CONVERSIONS = newWrapperCaches(2); |
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|
367 |
|
4537 | 368 |
/** |
369 |
* Becase we normalize primitive types to reduce the number of signatures, |
|
370 |
* primitives are sometimes manipulated under an "erased" type, |
|
371 |
* either int (for types other than long/double) or long (for all types). |
|
372 |
* When the erased primitive value is then boxed into an Integer or Long, |
|
373 |
* the final boxed primitive is sometimes required. This transformation |
|
374 |
* is called a "rebox". It takes an Integer or Long and produces some |
|
375 |
* other boxed value. |
|
376 |
*/ |
|
2707
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|
377 |
public static MethodHandle rebox(Wrapper wrap, boolean exact) { |
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|
378 |
EnumMap<Wrapper, MethodHandle> cache = REBOX_CONVERSIONS[exact?1:0]; |
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|
379 |
MethodHandle mh = cache.get(wrap); |
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changeset
|
380 |
if (mh != null) { |
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changeset
|
381 |
return mh; |
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parents:
diff
changeset
|
382 |
} |
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parents:
diff
changeset
|
383 |
// slow path |
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parents:
diff
changeset
|
384 |
switch (wrap) { |
5a17df307cbc
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parents:
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|
385 |
case OBJECT: |
5a17df307cbc
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parents:
diff
changeset
|
386 |
mh = IDENTITY; break; |
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parents:
diff
changeset
|
387 |
case VOID: |
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parents:
diff
changeset
|
388 |
throw new IllegalArgumentException("cannot rebox a void"); |
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jrose
parents:
diff
changeset
|
389 |
} |
5a17df307cbc
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jrose
parents:
diff
changeset
|
390 |
if (mh != null) { |
5a17df307cbc
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jrose
parents:
diff
changeset
|
391 |
cache.put(wrap, mh); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
392 |
return mh; |
5a17df307cbc
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jrose
parents:
diff
changeset
|
393 |
} |
5a17df307cbc
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jrose
parents:
diff
changeset
|
394 |
// look up the method |
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parents:
diff
changeset
|
395 |
String name = "reboxRaw" + wrap.simpleName(); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
396 |
MethodType type = reboxType(wrap); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
397 |
if (exact) |
5a17df307cbc
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jrose
parents:
diff
changeset
|
398 |
mh = IMPL_LOOKUP.findStatic(ValueConversions.class, name, type); |
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jrose
parents:
diff
changeset
|
399 |
else |
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jrose
parents:
diff
changeset
|
400 |
mh = retype(IDENTITY.type(), rebox(wrap, !exact)); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
401 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
402 |
cache.put(wrap, mh); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
403 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
404 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
405 |
throw new IllegalArgumentException("cannot find rebox adapter for " + wrap); |
5a17df307cbc
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jrose
parents:
diff
changeset
|
406 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
407 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
408 |
public static MethodHandle rebox(Class<?> type, boolean exact) { |
5a17df307cbc
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parents:
diff
changeset
|
409 |
return rebox(Wrapper.forPrimitiveType(type), exact); |
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6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
410 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
411 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
412 |
/// Width-changing conversions between int and long. |
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jrose
parents:
diff
changeset
|
413 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
414 |
static long widenInt(int x) { |
4537 | 415 |
return (long) x; |
416 |
} |
|
417 |
||
418 |
static Long widenBoxedInt(Integer x) { |
|
419 |
return (long)(int)x; |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
420 |
} |
5a17df307cbc
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jrose
parents:
diff
changeset
|
421 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
422 |
static int narrowLong(long x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
423 |
return (int) x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
424 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
425 |
|
4537 | 426 |
static Integer narrowBoxedLong(Long x) { |
427 |
return (int)(long) x; |
|
428 |
} |
|
429 |
||
2707
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changeset
|
430 |
/// Constant functions |
5a17df307cbc
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jrose
parents:
diff
changeset
|
431 |
|
5a17df307cbc
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jrose
parents:
diff
changeset
|
432 |
static void ignore(Object x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
433 |
// no value to return; this is an unbox of null |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
434 |
return; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
435 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
436 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
437 |
static void empty() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
438 |
return; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
439 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
440 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
441 |
static Object zeroObject() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
442 |
return null; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
443 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
444 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
445 |
static int zeroInteger() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
446 |
return 0; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
447 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
448 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
449 |
static long zeroLong() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
450 |
return 0; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
451 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
452 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
453 |
static float zeroFloat() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
454 |
return 0; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
455 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
456 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
457 |
static double zeroDouble() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
458 |
return 0; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
459 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
460 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
461 |
private static final EnumMap<Wrapper, MethodHandle>[] |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
462 |
ZERO_CONSTANT_FUNCTIONS = newWrapperCaches(1); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
463 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
464 |
public static MethodHandle zeroConstantFunction(Wrapper wrap) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
465 |
EnumMap<Wrapper, MethodHandle> cache = ZERO_CONSTANT_FUNCTIONS[0]; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
466 |
MethodHandle mh = cache.get(wrap); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
467 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
468 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
469 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
470 |
// slow path |
4537 | 471 |
MethodType type = MethodType.methodType(wrap.primitiveType()); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
472 |
switch (wrap) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
473 |
case VOID: |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
474 |
mh = EMPTY; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
475 |
break; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
476 |
case INT: case LONG: case FLOAT: case DOUBLE: |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
477 |
mh = IMPL_LOOKUP.findStatic(ValueConversions.class, "zero"+wrap.simpleName(), type); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
478 |
break; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
479 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
480 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
481 |
cache.put(wrap, mh); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
482 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
483 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
484 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
485 |
// use the raw method |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
486 |
Wrapper rawWrap = wrap.rawPrimitive(); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
487 |
if (rawWrap != wrap) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
488 |
mh = retype(type, zeroConstantFunction(rawWrap)); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
489 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
490 |
if (mh != null) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
491 |
cache.put(wrap, mh); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
492 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
493 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
494 |
throw new IllegalArgumentException("cannot find zero constant for " + wrap); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
495 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
496 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
497 |
/// Converting references to references. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
498 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
499 |
/** |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
500 |
* Value-killing function. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
501 |
* @param x an arbitrary reference value |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
502 |
* @return a null |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
503 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
504 |
static Object alwaysNull(Object x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
505 |
return null; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
506 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
507 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
508 |
/** |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
509 |
* Value-killing function. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
510 |
* @param x an arbitrary reference value |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
511 |
* @return a zero |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
512 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
513 |
static int alwaysZero(Object x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
514 |
return 0; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
515 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
516 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
517 |
/** |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
518 |
* Identity function. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
519 |
* @param x an arbitrary reference value |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
520 |
* @return the same value x |
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 |
static <T> T identity(T x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
523 |
return x; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
524 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
525 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
526 |
/** |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
527 |
* Identity function, with reference cast. |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
528 |
* @param t an arbitrary reference type |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
529 |
* @param x an arbitrary reference value |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
530 |
* @return the same value x |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
531 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
532 |
static <T,U> T castReference(Class<? extends T> t, U x) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
533 |
return t.cast(x); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
534 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
535 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
536 |
private static final MethodHandle IDENTITY, CAST_REFERENCE, ALWAYS_NULL, ALWAYS_ZERO, ZERO_OBJECT, IGNORE, EMPTY; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
537 |
static { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
538 |
try { |
4537 | 539 |
MethodType idType = MethodType.genericMethodType(1); |
540 |
MethodType castType = idType.insertParameterTypes(0, Class.class); |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
541 |
MethodType alwaysZeroType = idType.changeReturnType(int.class); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
542 |
MethodType ignoreType = idType.changeReturnType(void.class); |
4537 | 543 |
MethodType zeroObjectType = MethodType.genericMethodType(0); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
544 |
IDENTITY = IMPL_LOOKUP.findStatic(ValueConversions.class, "identity", idType); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
545 |
//CAST_REFERENCE = IMPL_LOOKUP.findVirtual(Class.class, "cast", idType); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
546 |
CAST_REFERENCE = IMPL_LOOKUP.findStatic(ValueConversions.class, "castReference", castType); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
547 |
ALWAYS_NULL = IMPL_LOOKUP.findStatic(ValueConversions.class, "alwaysNull", idType); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
548 |
ALWAYS_ZERO = IMPL_LOOKUP.findStatic(ValueConversions.class, "alwaysZero", alwaysZeroType); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
549 |
ZERO_OBJECT = IMPL_LOOKUP.findStatic(ValueConversions.class, "zeroObject", zeroObjectType); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
550 |
IGNORE = IMPL_LOOKUP.findStatic(ValueConversions.class, "ignore", ignoreType); |
4537 | 551 |
EMPTY = IMPL_LOOKUP.findStatic(ValueConversions.class, "empty", ignoreType.dropParameterTypes(0, 1)); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
552 |
} catch (RuntimeException ex) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
553 |
throw ex; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
554 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
555 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
556 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
557 |
private static final EnumMap<Wrapper, MethodHandle> WRAPPER_CASTS |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
558 |
= new EnumMap<Wrapper, MethodHandle>(Wrapper.class); |
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 |
private static final EnumMap<Wrapper, MethodHandle> EXACT_WRAPPER_CASTS |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
561 |
= new EnumMap<Wrapper, MethodHandle>(Wrapper.class); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
562 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
563 |
/** Return a method that casts its sole argument (an Object) to the given type |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
564 |
* and returns it as the given type (if exact is true), or as plain Object (if erase is true). |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
565 |
*/ |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
566 |
public static MethodHandle cast(Class<?> type, boolean exact) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
567 |
if (type.isPrimitive()) throw new IllegalArgumentException("cannot cast primitive type "+type); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
568 |
MethodHandle mh = null; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
569 |
Wrapper wrap = null; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
570 |
EnumMap<Wrapper, MethodHandle> cache = null; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
571 |
if (Wrapper.isWrapperType(type)) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
572 |
wrap = Wrapper.forWrapperType(type); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
573 |
cache = (exact ? EXACT_WRAPPER_CASTS : WRAPPER_CASTS); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
574 |
mh = cache.get(wrap); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
575 |
if (mh != null) return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
576 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
577 |
if (VerifyType.isNullReferenceConversion(Object.class, type)) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
578 |
mh = IDENTITY; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
579 |
else if (VerifyType.isNullType(type)) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
580 |
mh = ALWAYS_NULL; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
581 |
else |
4537 | 582 |
mh = MethodHandles.insertArguments(CAST_REFERENCE, 0, type); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
583 |
if (exact) { |
4537 | 584 |
MethodType xmt = MethodType.methodType(type, Object.class); |
585 |
mh = AdapterMethodHandle.makeRetypeRaw(IMPL_TOKEN, xmt, mh); |
|
2707
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 |
if (cache != null) |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
588 |
cache.put(wrap, mh); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
589 |
return mh; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
590 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
591 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
592 |
public static MethodHandle identity() { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
593 |
return IDENTITY; |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
594 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
595 |
|
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
596 |
private static MethodHandle retype(MethodType type, MethodHandle mh) { |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
597 |
return AdapterMethodHandle.makeRetypeOnly(IMPL_TOKEN, type, mh); |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
598 |
} |
4537 | 599 |
|
600 |
private static final Object[] NO_ARGS_ARRAY = {}; |
|
601 |
private static Object[] makeArray(Object... args) { return args; } |
|
602 |
private static Object[] array() { return NO_ARGS_ARRAY; } |
|
603 |
private static Object[] array(Object a0) |
|
604 |
{ return makeArray(a0); } |
|
605 |
private static Object[] array(Object a0, Object a1) |
|
606 |
{ return makeArray(a0, a1); } |
|
607 |
private static Object[] array(Object a0, Object a1, Object a2) |
|
608 |
{ return makeArray(a0, a1, a2); } |
|
609 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3) |
|
610 |
{ return makeArray(a0, a1, a2, a3); } |
|
611 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3, |
|
612 |
Object a4) |
|
613 |
{ return makeArray(a0, a1, a2, a3, a4); } |
|
614 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3, |
|
615 |
Object a4, Object a5) |
|
616 |
{ return makeArray(a0, a1, a2, a3, a4, a5); } |
|
617 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3, |
|
618 |
Object a4, Object a5, Object a6) |
|
619 |
{ return makeArray(a0, a1, a2, a3, a4, a5, a6); } |
|
620 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3, |
|
621 |
Object a4, Object a5, Object a6, Object a7) |
|
622 |
{ return makeArray(a0, a1, a2, a3, a4, a5, a6, a7); } |
|
623 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3, |
|
624 |
Object a4, Object a5, Object a6, Object a7, |
|
625 |
Object a8) |
|
626 |
{ return makeArray(a0, a1, a2, a3, a4, a5, a6, a7, a8); } |
|
627 |
private static Object[] array(Object a0, Object a1, Object a2, Object a3, |
|
628 |
Object a4, Object a5, Object a6, Object a7, |
|
629 |
Object a8, Object a9) |
|
630 |
{ return makeArray(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); } |
|
631 |
static MethodHandle[] makeArrays() { |
|
632 |
ArrayList<MethodHandle> arrays = new ArrayList<MethodHandle>(); |
|
633 |
MethodHandles.Lookup lookup = IMPL_LOOKUP; |
|
634 |
for (;;) { |
|
635 |
int nargs = arrays.size(); |
|
636 |
MethodType type = MethodType.genericMethodType(nargs).changeReturnType(Object[].class); |
|
637 |
String name = "array"; |
|
638 |
MethodHandle array = null; |
|
639 |
try { |
|
640 |
array = lookup.findStatic(ValueConversions.class, name, type); |
|
641 |
} catch (NoAccessException ex) { |
|
642 |
} |
|
643 |
if (array == null) break; |
|
644 |
arrays.add(array); |
|
645 |
} |
|
646 |
assert(arrays.size() == 11); // current number of methods |
|
647 |
return arrays.toArray(new MethodHandle[0]); |
|
648 |
} |
|
649 |
static final MethodHandle[] ARRAYS = makeArrays(); |
|
650 |
||
651 |
/** Return a method handle that takes the indicated number of Object |
|
652 |
* arguments and returns an Object array of them, as if for varargs. |
|
653 |
*/ |
|
654 |
public static MethodHandle varargsArray(int nargs) { |
|
655 |
if (nargs < ARRAYS.length) |
|
656 |
return ARRAYS[nargs]; |
|
657 |
// else need to spin bytecode or do something else fancy |
|
5722
4ada807383c8
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
4537
diff
changeset
|
658 |
throw new UnsupportedOperationException("NYI: cannot form a varargs array of length "+nargs); |
4537 | 659 |
} |
660 |
||
661 |
private static final List<Object> NO_ARGS_LIST = Arrays.asList(NO_ARGS_ARRAY); |
|
662 |
private static List<Object> makeList(Object... args) { return Arrays.asList(args); } |
|
663 |
private static List<Object> list() { return NO_ARGS_LIST; } |
|
664 |
private static List<Object> list(Object a0) |
|
665 |
{ return makeList(a0); } |
|
666 |
private static List<Object> list(Object a0, Object a1) |
|
667 |
{ return makeList(a0, a1); } |
|
668 |
private static List<Object> list(Object a0, Object a1, Object a2) |
|
669 |
{ return makeList(a0, a1, a2); } |
|
670 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3) |
|
671 |
{ return makeList(a0, a1, a2, a3); } |
|
672 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3, |
|
673 |
Object a4) |
|
674 |
{ return makeList(a0, a1, a2, a3, a4); } |
|
675 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3, |
|
676 |
Object a4, Object a5) |
|
677 |
{ return makeList(a0, a1, a2, a3, a4, a5); } |
|
678 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3, |
|
679 |
Object a4, Object a5, Object a6) |
|
680 |
{ return makeList(a0, a1, a2, a3, a4, a5, a6); } |
|
681 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3, |
|
682 |
Object a4, Object a5, Object a6, Object a7) |
|
683 |
{ return makeList(a0, a1, a2, a3, a4, a5, a6, a7); } |
|
684 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3, |
|
685 |
Object a4, Object a5, Object a6, Object a7, |
|
686 |
Object a8) |
|
687 |
{ return makeList(a0, a1, a2, a3, a4, a5, a6, a7, a8); } |
|
688 |
private static List<Object> list(Object a0, Object a1, Object a2, Object a3, |
|
689 |
Object a4, Object a5, Object a6, Object a7, |
|
690 |
Object a8, Object a9) |
|
691 |
{ return makeList(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); } |
|
692 |
static MethodHandle[] makeLists() { |
|
693 |
ArrayList<MethodHandle> arrays = new ArrayList<MethodHandle>(); |
|
694 |
MethodHandles.Lookup lookup = IMPL_LOOKUP; |
|
695 |
for (;;) { |
|
696 |
int nargs = arrays.size(); |
|
697 |
MethodType type = MethodType.genericMethodType(nargs).changeReturnType(List.class); |
|
698 |
String name = "list"; |
|
699 |
MethodHandle array = null; |
|
700 |
try { |
|
701 |
array = lookup.findStatic(ValueConversions.class, name, type); |
|
702 |
} catch (NoAccessException ex) { |
|
703 |
} |
|
704 |
if (array == null) break; |
|
705 |
arrays.add(array); |
|
706 |
} |
|
707 |
assert(arrays.size() == 11); // current number of methods |
|
708 |
return arrays.toArray(new MethodHandle[0]); |
|
709 |
} |
|
710 |
static final MethodHandle[] LISTS = makeLists(); |
|
711 |
||
712 |
/** Return a method handle that takes the indicated number of Object |
|
713 |
* arguments and returns List. |
|
714 |
*/ |
|
715 |
public static MethodHandle varargsList(int nargs) { |
|
716 |
if (nargs < LISTS.length) |
|
717 |
return LISTS[nargs]; |
|
718 |
// else need to spin bytecode or do something else fancy |
|
719 |
throw new UnsupportedOperationException("NYI"); |
|
720 |
} |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
721 |
} |
4537 | 722 |