java.util.MapEntry Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 java.util;
/**
* MapEntry is an internal class which provides an implementation of Map.Entry.
*/
class MapEntry implements Map.Entry, Cloneable {
K key;
V value;
interface Type {
RT get(MapEntry entry);
}
MapEntry(K theKey) {
key = theKey;
}
MapEntry(K theKey, V theValue) {
key = theKey;
value = theValue;
}
@Override
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException e) {
throw new AssertionError(e);
}
}
@Override
public boolean equals(Object object) {
if (this == object) {
return true;
}
if (object instanceof Map.Entry) {
Map.Entry entry = (Map.Entry) object;
return (key == null ? entry.getKey() == null : key.equals(entry
.getKey()))
&& (value == null ? entry.getValue() == null : value
.equals(entry.getValue()));
}
return false;
}
public K getKey() {
return key;
}
public V getValue() {
return value;
}
@Override
public int hashCode() {
return (key == null ? 0 : key.hashCode())
^ (value == null ? 0 : value.hashCode());
}
public V setValue(V object) {
V result = value;
value = object;
return result;
}
@Override
public String toString() {
return key + "=" + value;
}
}