org.frameworkset.util.LinkedMultiValueMap Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of bboss-util Show documentation
bboss is a j2ee framework include aop/ioc,mvc,persistent,taglib,rpc,event ,bean-xml serializable and so on.http://www.bbossgroups.com
There is a newer version: 6.2.7
Show newest version
/*
 *  Copyright 2008 biaoping.yin
 *
 *  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.frameworkset.util;

import java.io.Serializable;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * Title: LinkedMultiValueMap.java 
 * Description: 
 * bboss workgroup
 * Copyright (c) 2008
 * @Date 2010-11-22
 * @author biaoping.yin
 * @version 1.0
 */
public class LinkedMultiValueMap implements MultiValueMap, Serializable {

	private static final long serialVersionUID = 3801124242820219131L;

	private final Map> targetMap;


	/**
	 * Create a new LinkedMultiValueMap that wraps a {@link LinkedHashMap}.
	 */
	public LinkedMultiValueMap() {
		this.targetMap = new LinkedHashMap>();
	}

	/**
	 * Create a new LinkedMultiValueMap that wraps a {@link LinkedHashMap}
	 * with the given initial capacity.
	 * @param initialCapacity the initial capacity
	 */
	public LinkedMultiValueMap(int initialCapacity) {
		this.targetMap = new LinkedHashMap>(initialCapacity);
	}

	/**
	 * Copy constructor: Create a new LinkedMultiValueMap with the same mappings
	 * as the specified Map.
	 * @param otherMap the Map whose mappings are to be placed in this Map
	 */
	public LinkedMultiValueMap(Map> otherMap) {
		this.targetMap = new LinkedHashMap>(otherMap);
	}


	// MultiValueMap implementation

	public void add(K key, V value) {
		List values = this.targetMap.get(key);
		if (values == null) {
			values = new LinkedList();
			this.targetMap.put(key, values);
		}
		values.add(value);
	}

	public V getFirst(K key) {
		List values = this.targetMap.get(key);
		return (values != null ? values.get(0) : null);
	}

	public void set(K key, V value) {
		List values = new LinkedList();
		values.add(value);
		this.targetMap.put(key, values);
	}

	public void setAll(Map values) {
		for (Entry entry : values.entrySet()) {
			set(entry.getKey(), entry.getValue());
		}
	}

	public Map toSingleValueMap() {
		LinkedHashMap singleValueMap = new LinkedHashMap(this.targetMap.size());
		for (Entry> entry : targetMap.entrySet()) {
			singleValueMap.put(entry.getKey(), entry.getValue().get(0));
		}
		return singleValueMap;
	}


	// Map implementation

	public int size() {
		return this.targetMap.size();
	}

	public boolean isEmpty() {
		return this.targetMap.isEmpty();
	}

	public boolean containsKey(Object key) {
		return this.targetMap.containsKey(key);
	}

	public boolean containsValue(Object value) {
		return this.targetMap.containsValue(value);
	}

	public List get(Object key) {
		return this.targetMap.get(key);
	}

	public List put(K key, List value) {
		return this.targetMap.put(key, value);
	}

	public List remove(Object key) {
		return this.targetMap.remove(key);
	}

	public void putAll(Map> m) {
		this.targetMap.putAll(m);
	}

	public void clear() {
		this.targetMap.clear();
	}

	public Set keySet() {
		return this.targetMap.keySet();
	}

	public Collection> values() {
		return this.targetMap.values();
	}

	public Set>> entrySet() {
		return this.targetMap.entrySet();
	}


	@Override
	public boolean equals(Object obj) {
		return this.targetMap.equals(obj);
	}

	@Override
	public int hashCode() {
		return this.targetMap.hashCode();
	}

	@Override
	public String toString() {
		return this.targetMap.toString();
	}

}