com.github.datalking.common.LinkedMultiValueMap Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of play-mvc Show documentation
simple mvc framework based on java servlet.
The newest version!
package com.github.datalking.common;

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;

/**
 * 支持多个值的map，将多个值存在 LinkedList 中
 * 
 * 非线程安全
 */
public class LinkedMultiValueMap implements MultiValueMap, Serializable {

    private static final long serialVersionUID = 3801124242820219131L;

    private final Map> targetMap;

    public LinkedMultiValueMap() {
        this.targetMap = new LinkedHashMap<>();
    }

    public LinkedMultiValueMap(int initialCapacity) {
        this.targetMap = new LinkedHashMap<>(initialCapacity);
    }

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

    public Map toSingleValueMap() {
        LinkedHashMap singleValueMap = new LinkedHashMap(this.targetMap.size());
        for (Map.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();
    }

}