package org.etk.core.rest;
import java.util.List;
import javax.ws.rs.core.MultivaluedMap;
/**
* Extension of {@link MultivaluedMap} that allows to get not null value (empty
* list) even there is no mapping value to supplied key.
*
* @param <K> key
* @param <V> value
* @see #getList(Object)
*/
public interface ExtMultivaluedMap<K, V> extends MultivaluedMap<K, V> {
/**
* @param key key
* @return never null even any value not found in the map, return empty list
* instead
*/
List<V> getList(K key);
}