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8336926: jdk/internal/util/ReferencedKeyTest.java can fail with ConcurrentModificationException

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Reviewed-by: bpb, shade, dfuchs
This commit is contained in:
Roger Riggs 2024-08-08 16:53:38 +00:00
parent 53c9f037fb
commit bfb75b9626
1 changed files with 10 additions and 4 deletions
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14
src/java.base/share/classes/jdk/internal/util/ReferencedKeyMap.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2023, 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
@ -219,8 +219,14 @@ public final class ReferencedKeyMap<K, V> implements Map<K, V> {
@Override
public V get(Object key) {
Objects.requireNonNull(key, "key must not be null");
removeStaleReferences();
return getNoCheckStale(key);
}
// Internal get(key) without removing stale references that would modify the keyset.
// Use when iterating or streaming over the keys to avoid ConcurrentModificationException.
private V getNoCheckStale(Object key) {
Objects.requireNonNull(key, "key must not be null");
return map.get(lookupKey(key));
}
@ -291,7 +297,7 @@ public final class ReferencedKeyMap<K, V> implements Map<K, V> {
public Set<Entry<K, V>> entrySet() {
removeStaleReferences();
return filterKeySet()
.map(k -> new AbstractMap.SimpleEntry<>(k, get(k)))
.map(k -> new AbstractMap.SimpleEntry<>(k, getNoCheckStale(k)))
.collect(Collectors.toSet());
}
@ -335,7 +341,7 @@ public final class ReferencedKeyMap<K, V> implements Map<K, V> {
public String toString() {
removeStaleReferences();
return filterKeySet()
.map(k -> k + "=" + get(k))
.map(k -> k + "=" + getNoCheckStale(k))
.collect(Collectors.joining(", ", "{", "}"));
}