1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.io.Serializable;
26  
27  import java.util.Collection;
28  import java.util.HashSet;
29  import java.util.Map;
30  import java.util.Set;
31  
32  /**
33   * <a href="MultiValueMap.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Alexander Chow
36   *
37   */
38  public abstract class MultiValueMap
39      <K extends Serializable, V extends Serializable> implements Map<K, V> {
40  
41      public Set<Map.Entry<K, V>> entrySet() {
42          throw new UnsupportedOperationException();
43      }
44  
45      public V get(Object key) {
46          throw new UnsupportedOperationException();
47      }
48  
49      public abstract Set<V> getAll(Object key);
50  
51      public abstract Set<V> putAll(K key, Collection<? extends V> values);
52  
53      public void putAll(Map<? extends K, ? extends V> map) {
54          MultiValueMap<? extends K, ? extends V> multiValueMap = null;
55  
56          if (map instanceof MultiValueMap) {
57              multiValueMap = (MultiValueMap<? extends K, ? extends V>)map;
58          }
59  
60          for (K key : map.keySet()) {
61              if (multiValueMap != null) {
62                  putAll(key, multiValueMap.getAll(key));
63              }
64              else {
65                  put(key, map.get(key));
66              }
67          }
68      }
69  
70      public int size() {
71          int size = 0;
72  
73          for (K key : keySet()) {
74              size += size(key);
75          }
76  
77          return size;
78      }
79  
80      public int size(Object key) {
81          int size = 0;
82  
83          Collection<V> values = getAll(key);
84  
85          if (values != null) {
86              size = values.size();
87          }
88  
89          return size;
90      }
91  
92      public Collection<V> values() {
93          Set<V> values = new HashSet<V>();
94  
95          Set<K> keys = keySet();
96  
97          for (K key : keys) {
98              values.addAll(getAll(key));
99          }
100 
101         return values;
102     }
103 
104 }