cn.ipokerface.weixin.collections.MultiValueMap Maven / Gradle / Ivy
package cn.ipokerface.weixin.collections;
import java.util.List;
import java.util.Map;
/**
* Created by PokerFace
* Create Date 2019-12-27.
* Email: [email protected]
* Version 1.0.0
*
* Description:
*/
public interface MultiValueMap extends Map> {
/**
* Return the first value for the given key.
*
* @param key
* the key
* @return the first value for the specified key, or {@code null}
*/
V getFirst(K key);
/**
* Add the given single value to the current list of values for the given
* key.
*
* @param key
* the key
* @param value
* the value to be added
*/
void add(K key, V value);
/**
* Set the given single value under the given key.
*
* @param key
* the key
* @param value
* the value to set
*/
void set(K key, V value);
/**
* Set the given values under.
*
* @param values
* the values.
*/
void setAll(Map values);
/**
* Returns the first values contained in this {@code MultiValueMap}.
*
* @return a single value representation of this map
*/
Map toSingleValueMap();
}