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/*
 * MultivaluedMap.java
 *
 * Created on February 13, 2007, 2:30 PM
 *
 */

package javax.ws.rs.core;

import java.util.List;
import java.util.Map;

/**
 * A map of key-values pairs. Each key can have zero or more values.
 * 
 */
public interface MultivaluedMap extends Map> {
    
    /**
     * Set the key's value to be a one item list consisting of the supplied value.
     * Any existing values will be replaced.
     * 
     * @param key the key
     * @param value the single value of the key
     */
    void putSingle(K key, V value);
    
    /**
     * Add a value to the current list of values for the supplied key.
     * @param key the key 
     * @param value the value to be added.
     */
    void add(K key, V value);
    
    /**
     * A shortcut to get the first value of the supplied key.
     * @param key the key
     * @return the first value for the specified key or null if the key is
     * not in the map.
     */
    V getFirst(K key);
    
}