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view src/goodjava/util/SoftCacheMap.java @ 1674:af18eacf187c
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 29 May 2022 23:38:34 -0600 |
parents | 1b809d2fdf03 |
children |
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package goodjava.util; import java.lang.ref.ReferenceQueue; import java.lang.ref.SoftReference; public final class SoftCacheMap<K,V> extends CacheMap<K,V> { static final class MySoftReference<K,V> extends SoftReference<V> implements MyReference<K,V> { private final K key; MySoftReference(K key,V value,ReferenceQueue<V> q) { super(value,q); this.key = key; } public K key() { return key; } public boolean equals(Object obj) { Object o = this.get(); if( o==null ) return false; SoftReference ref = (SoftReference)obj; return o.equals(ref.get()); } } protected MyReference<K,V> newReference(K key,V value,ReferenceQueue<V> q) { return new MySoftReference<K,V>(key,value,q); } }