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/*
* Copyright (C) 2011 The Guava Authors
*
* 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 org.glassfish.jersey.internal.guava;
import java.util.Map.Entry;
import java.util.Objects;
/**
* A notification of the removal of a single entry. The key and/or value may be null if they were
* already garbage collected.
*
*
Like other {@code Map.Entry} instances associated with {@code CacheBuilder}, this class holds
* strong references to the key and value, regardless of the type of references the cache may be
* using.
*
* @author Charles Fry
* @since 10.0
*/
final class RemovalNotification implements Entry {
private static final long serialVersionUID = 0;
private final K key;
private final V value;
RemovalNotification(K key, V value, RemovalCause cause) {
this.key = key;
this.value = value;
}
@Override
public K getKey() {
return key;
}
@Override
public V getValue() {
return value;
}
@Override
public final V setValue(V value) {
throw new UnsupportedOperationException();
}
@Override
public boolean equals(Object object) {
if (object instanceof Entry) {
Entry that = (Entry) object;
return Objects.equals(this.getKey(), that.getKey())
&& Objects.equals(this.getValue(), that.getValue());
}
return false;
}
@Override
public int hashCode() {
K k = getKey();
V v = getValue();
return ((k == null) ? 0 : k.hashCode()) ^ ((v == null) ? 0 : v.hashCode());
}
/**
* Returns a string representation of the form {key}={value}.
*/
@Override
public String toString() {
return getKey() + "=" + getValue();
}
}