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8284036: Make ConcurrentHashMap.CollectionView a sealed hierarchy

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Reviewed-by: smarks
This commit is contained in:
Jaikiran Pai 2022-04-11 01:24:18 +00:00
parent 92f5e42696
commit eb3ead96b3
1 changed files with 3 additions and 3 deletions
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6
src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
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@ -4416,8 +4416,8 @@ public class ConcurrentHashMap<K,V> extends AbstractMap<K,V>
/**
* Base class for views.
*/
abstract static class CollectionView<K,V,E>
implements Collection<E>, java.io.Serializable {
abstract static sealed class CollectionView<K,V,E>
implements Collection<E>, java.io.Serializable permits EntrySetView, KeySetView, ValuesView {
private static final long serialVersionUID = 7249069246763182397L;
final ConcurrentHashMap<K,V> map;
CollectionView(ConcurrentHashMap<K,V> map) { this.map = map; }
@ -4589,7 +4589,7 @@ public class ConcurrentHashMap<K,V> extends AbstractMap<K,V>
*
* @since 1.8
*/
public static class KeySetView<K,V> extends CollectionView<K,V,K>
public static final class KeySetView<K,V> extends CollectionView<K,V,K>
implements Set<K>, java.io.Serializable {
private static final long serialVersionUID = 7249069246763182397L;
@SuppressWarnings("serial") // Conditionally serializable