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8332614: Type-checked ConstantPool.entryByIndex and ClassReader.readEntryOrNull

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Reviewed-by: asotona
This commit is contained in:
Chen Liang 2024-05-30 11:51:49 +00:00 • committed by Adam Sotona
parent 1b04f6487c
commit f608918df3
15 changed files with 230 additions and 90 deletions
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18
src/java.base/share/classes/java/lang/classfile/constantpool/ConstantPool.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2022, 2024, 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
@ -46,6 +46,10 @@ public sealed interface ConstantPool extends Iterable<PoolEntry>
/**
* {@return the entry at the specified index}
*
* @apiNote
* If only a particular type of entry is expected, use {@link #entryByIndex(
* int, Class) entryByIndex(int, Class)}.
*
* @param index the index within the pool of the desired entry
* @throws ConstantPoolException if the index is out of range of the
* constant pool, or is considered unusable
@ -57,6 +61,18 @@ public sealed interface ConstantPool extends Iterable<PoolEntry>
*/
int size();
/**
* {@return the entry of a given type at the specified index}
*
* @param <T> the entry type
* @param index the index within the pool of the desired entry
* @param cls the entry type
* @throws ConstantPoolException if the index is out of range of the
* constant pool, or the entry is not of the given type
* @since 24
*/
<T extends PoolEntry> T entryByIndex(int index, Class<T> cls);
/**
* {@return an iterator over pool entries}
*/