/*
* JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.com)
*
* 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 jef.common;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import jef.tools.StringUtils;
import com.google.common.base.Objects;
/**
* 描述由两个值构成的值对
* @author Administrator
*
* @param <K>
* @param <V>
*/
public class Entry<K,V> implements Serializable,java.util.Map.Entry<K,V>{
private static final long serialVersionUID = 2805658306682403737L;
private K key;
private V value;
public String toString() {
return StringUtils.toString(key)+":"+StringUtils.toString(value);
}
public K getKey() {
return key;
}
public V getValue() {
return value;
}
public V setValue(V value) {
V old=this.value;
this.value=value;
return old;
}
public final void setKey(K key) {
this.key = key;
}
public Entry(){};
public Entry(K k,V v){
this.key=k;
this.value=v;
}
public static <K,V> List<Entry<K,V>> fromMap(Map<K,V> map){
List<Entry<K,V>> list=new ArrayList<Entry<K,V>>();
for(K k:map.keySet()){
list.add(new Entry<K,V>(k,map.get(k)));
}
return list;
}
@Override
public int hashCode() {
int i=0;
if(key!=null)i+=key.hashCode();
if(value!=null)i+=value.hashCode();
return i;
}
@SuppressWarnings("rawtypes")
@Override
public boolean equals(Object obj) {
if(obj instanceof Entry){
if(!Objects.equal(((Entry) obj).getKey(), key))return false;
if(!Objects.equal(((Entry) obj).getValue(), value))return false;
return true;
}else{
return false;
}
}
}