net.hasor.utils.ref.AbstractMapEntry 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 net.hasor.utils.ref;
import java.util.Map;
/**
* Abstract pair class to assist with creating KeyValue
* and {@link Map.Entry Map.Entry} implementations.
*
* @since Commons Collections 3.0
* @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
*
* @author James Strachan
* @author Michael A. Smith
* @author Neil O'Toole
* @author Stephen Colebourne
*/
abstract class AbstractMapEntry implements Map.Entry {
/** The key */
protected T key;
/** The value */
protected V value;
/**
* Constructs a new pair with the specified key and given value.
* @param key the key for the entry, may be null
* @param value the value for the entry, may be null
*/
protected AbstractMapEntry(T key, V value) {
super();
this.key = key;
this.value = value;
}
/**
* Gets the key from the pair.
* @return the key
*/
public T getKey() {
return key;
}
/**
* Gets the value from the pair.
* @return the value
*/
public V getValue() {
return value;
}
/**
* Gets a debugging String view of the pair.
* @return a String view of the entry
*/
public String toString() {
return String.valueOf(getKey()) + '=' + getValue();
}
}