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Java > Open Source Codes > org > jibx > binding > model > EmptyList


1 /*
2 Copyright (c) 2004-2005, Dennis M. Sosnoski
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without modification,
6 are permitted provided that the following conditions are met:
7
8  * Redistributions of source code must retain the above copyright notice, this
9    list of conditions and the following disclaimer.
10  * Redistributions in binary form must reproduce the above copyright notice,
11    this list of conditions and the following disclaimer in the documentation
12    and/or other materials provided with the distribution.
13  * Neither the name of JiBX nor the names of its contributors may be used
14    to endorse or promote products derived from this software without specific
15    prior written permission.
16
17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
18 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
21 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 package org.jibx.binding.model;
30
31 import java.util.ArrayList JavaDoc;
32 import java.util.Collection JavaDoc;
33
34 /**
35  * Unmodifiable empty array list. This defines a singleton instance of itself,
36  * which can then be used whereever an empty list is convenient.
37  *
38  * @author Dennis M. Sosnoski
39  * @version 1.0
40  */
41  
42 public class EmptyList extends ArrayList JavaDoc
43 {
44     public static final EmptyList INSTANCE = new EmptyList();
45     
46     private EmptyList() {}
47     
48     /* (non-Javadoc)
49      * @see java.util.List#add(int, java.lang.Object)
50      */
51     public void add(int index, Object JavaDoc element) {
52         throw new UnsupportedOperationException JavaDoc("List is not modifiable");
53     }
54
55     /* (non-Javadoc)
56      * @see java.util.Collection#add(java.lang.Object)
57      */
58     public boolean add(Object JavaDoc o) {
59         throw new UnsupportedOperationException JavaDoc("List is not modifiable");
60     }
61
62     /* (non-Javadoc)
63      * @see java.util.Collection#addAll(java.util.Collection)
64      */
65     public boolean addAll(Collection JavaDoc c) {
66         throw new UnsupportedOperationException JavaDoc("List is not modifiable");
67     }
68
69     /* (non-Javadoc)
70      * @see java.util.List#addAll(int, java.util.Collection)
71      */
72     public boolean addAll(int index, Collection JavaDoc c) {
73         throw new UnsupportedOperationException JavaDoc("List is not modifiable");
74     }
75
76     /* (non-Javadoc)
77      * @see java.util.ArrayList#ensureCapacity(int)
78      */
79     public void ensureCapacity(int minCapacity) {
80         throw new UnsupportedOperationException JavaDoc("List is not modifiable");
81     }
82 }
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