/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.util.containers;
import org.jetbrains.annotations.NotNull;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.SoftReference;
import java.util.Map;
final class WeakKeySoftValueHashMap<K,V> extends RefKeyRefValueHashMap<K,V> implements Map<K,V>{
public WeakKeySoftValueHashMap() {
super(new WeakHashMap<K, ValueReference<K, V>>());
}
private static class SoftValueReference<K,V> extends SoftReference<V> implements ValueReference<K,V> {
@NotNull private final RefHashMap.Key<K> key;
private SoftValueReference(@NotNull WeakHashMap.Key<K> key, V referent, ReferenceQueue<? super V> q) {
super(referent, q);
this.key = key;
}
@NotNull
@Override
public RefHashMap.Key<K> getKey() {
return key;
}
}
@Override
protected ValueReference<K, V> createValueReference(@NotNull RefHashMap.Key<K> key,
V referent,
ReferenceQueue<? super V> q) {
return new SoftValueReference<K, V>(key, referent, q);
}
}