1 /*
2 * Copyright (C) 2012 Jean-Christophe Gay (contact@jeanchristophegay.com)
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.codehaus.mojo.buildplan.util;
17
18 import java.util.Collection;
19 import java.util.Map;
20 import java.util.Set;
21
22 public interface Multimap<K, V> {
23
24 Set<K> keySet();
25
26 Collection<V> get(K key);
27
28 boolean put(K key, V value);
29
30 Map<K, Collection<V>> asMap();
31
32 boolean isEmpty();
33
34 Collection<V> values();
35 }