View Javadoc

1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.collections.primitives.adapters;
18  
19  import java.lang.reflect.Array;
20  import java.util.Collection;
21  import java.util.Iterator;
22  
23  import org.apache.commons.collections.primitives.ShortCollection;
24  
25  /**
26   * @since Commons Primitives 1.0
27   * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
28   * @author Rodney Waldhoff 
29   */
30  abstract class AbstractShortCollectionCollection implements Collection {
31      
32      public boolean add(Object element) {
33          return getShortCollection().add(((Number)element).shortValue());
34      }
35  
36      public boolean addAll(Collection c) {
37          return getShortCollection().addAll(CollectionShortCollection.wrap(c));
38      }
39          
40      public void clear() {
41          getShortCollection().clear();
42      }
43  
44      public boolean contains(Object element) {
45          return getShortCollection().contains(((Number)element).shortValue());
46      }
47     
48      
49      public boolean containsAll(Collection c) {
50          return getShortCollection().containsAll(CollectionShortCollection.wrap(c));
51      }        
52          
53      public String toString() {
54          return getShortCollection().toString();
55      }
56      
57      public boolean isEmpty() {
58          return getShortCollection().isEmpty();
59      }
60      
61      /**
62       * {@link ShortIteratorIterator#wrap wraps} the 
63       * {@link org.apache.commons.collections.primitives.ShortIterator ShortIterator}
64       * returned by my underlying 
65       * {@link ShortCollection ShortCollection}, 
66       * if any.
67       */
68      public Iterator iterator() {
69          return ShortIteratorIterator.wrap(getShortCollection().iterator());
70      }
71       
72      public boolean remove(Object element) {
73          return getShortCollection().removeElement(((Number)element).shortValue());
74      }
75      
76      public boolean removeAll(Collection c) {
77          return getShortCollection().removeAll(CollectionShortCollection.wrap(c));
78      }
79      
80      public boolean retainAll(Collection c) {
81          return getShortCollection().retainAll(CollectionShortCollection.wrap(c));
82      }
83      
84      public int size() {
85          return getShortCollection().size();
86      }
87      
88      public Object[] toArray() {
89          short[] a = getShortCollection().toArray();
90          Object[] A = new Object[a.length];
91          for(int i=0;i<a.length;i++) {
92              A[i] = new Short(a[i]);
93          }
94          return A;
95      }
96      
97      public Object[] toArray(Object[] A) {
98          short[] a = getShortCollection().toArray();
99          if(A.length < a.length) {
100             A = (Object[])(Array.newInstance(A.getClass().getComponentType(), a.length));
101         }
102         for(int i=0;i<a.length;i++) {
103             A[i] = new Short(a[i]);
104         }
105         if(A.length > a.length) {
106             A[a.length] = null;
107         }
108 
109         return A;
110     }
111 
112     protected abstract ShortCollection getShortCollection();            
113 }