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8283470: Update java.lang.invoke.VarHandle to use sealed classes

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Reviewed-by: darcy, psandoz
This commit is contained in:
Mandy Chung 2022-03-30 17:37:42 +00:00
parent e85fa2f04b
commit e61ccfba7f
5 changed files with 53 additions and 16 deletions
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43
src/java.base/share/classes/java/lang/invoke/VarHandle.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -31,15 +31,10 @@ import java.lang.constant.ConstantDesc;
import java.lang.constant.ConstantDescs;
import java.lang.constant.DirectMethodHandleDesc;
import java.lang.constant.DynamicConstantDesc;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.BiFunction;
import java.util.function.Function;
import jdk.internal.util.Preconditions;
import jdk.internal.vm.annotation.DontInline;
import jdk.internal.vm.annotation.ForceInline;
import jdk.internal.vm.annotation.IntrinsicCandidate;
@ -476,7 +471,41 @@ import static java.lang.invoke.MethodHandleStatics.UNSAFE;
* @see MethodType
* @since 9
*/
public abstract class VarHandle implements Constable {
public abstract sealed class VarHandle implements Constable
permits IndirectVarHandle, MemoryAccessVarHandleBase,
VarHandleByteArrayAsChars.ByteArrayViewVarHandle,
VarHandleByteArrayAsDoubles.ByteArrayViewVarHandle,
VarHandleByteArrayAsFloats.ByteArrayViewVarHandle,
VarHandleByteArrayAsInts.ByteArrayViewVarHandle,
VarHandleByteArrayAsLongs.ByteArrayViewVarHandle,
VarHandleByteArrayAsShorts.ByteArrayViewVarHandle,
VarHandleBooleans.Array,
VarHandleBooleans.FieldInstanceReadOnly,
VarHandleBooleans.FieldStaticReadOnly,
VarHandleBytes.Array,
VarHandleBytes.FieldInstanceReadOnly,
VarHandleBytes.FieldStaticReadOnly,
VarHandleChars.Array,
VarHandleChars.FieldInstanceReadOnly,
VarHandleChars.FieldStaticReadOnly,
VarHandleDoubles.Array,
VarHandleDoubles.FieldInstanceReadOnly,
VarHandleDoubles.FieldStaticReadOnly,
VarHandleFloats.Array,
VarHandleFloats.FieldInstanceReadOnly,
VarHandleFloats.FieldStaticReadOnly,
VarHandleInts.Array,
VarHandleInts.FieldInstanceReadOnly,
VarHandleInts.FieldStaticReadOnly,
VarHandleLongs.Array,
VarHandleLongs.FieldInstanceReadOnly,
VarHandleLongs.FieldStaticReadOnly,
VarHandleReferences.Array,
VarHandleReferences.FieldInstanceReadOnly,
VarHandleReferences.FieldStaticReadOnly,
VarHandleShorts.Array,
VarHandleShorts.FieldInstanceReadOnly,
VarHandleShorts.FieldStaticReadOnly {
final VarForm vform;
final boolean exact;