1 /*
2 * Copyright (c) 2003, Henri Yandell
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or
6 * without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * + Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * + Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * + Neither the name of Genjava-Core nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32 package com.generationjava.collections;
33
34 import java.util.Set;
35 import java.util.HashSet;
36 import java.util.Collection;
37 import java.util.Iterator;
38
39 /***
40 * A Set which wraps another Set. Intended mainly to
41 * be used as a superclass.
42 */
43 public class ProxySet implements Set {
44
45 private Set set;
46
47 public ProxySet(Set set) {
48 this.set = set;
49 }
50
51 public boolean add(Object obj) {
52 // Adds the specified element to this set if it is not already present (optional operation).
53 return this.set.add(obj);
54 }
55
56 public boolean addAll(Collection c) {
57 // Adds all of the elements in the specified collection to this set if they're not already present (optional operation).
58 return this.set.addAll(c);
59 }
60
61 public void clear() {
62 // Removes all of the elements from this set (optional operation).
63 this.set.clear();
64 }
65
66 public boolean contains(Object obj) {
67 // Returns true if this set contains the specified element.
68 return this.set.contains(obj);
69 }
70
71 public boolean containsAll(Collection c) {
72 // Returns true if this set contains all of the elements of the specified collection.
73 return this.set.containsAll(c);
74 }
75
76 public boolean equals(Object obj) {
77 // Compares the specified object with this set for equality.
78 return this.set.equals(obj);
79 }
80
81 public int hashCode() {
82 // Returns the hash code value for this this.set.
83 return this.set.hashCode();
84 }
85
86 public boolean isEmpty() {
87 // Returns true if this set contains no elements.
88 return this.set.isEmpty();
89 }
90
91 public Iterator iterator() {
92 // Returns an iterator over the elements in this this.set.
93 return this.set.iterator();
94 }
95
96 public boolean remove(Object obj) {
97 // Removes the specified element from this set if it is present (optional operation).
98 return this.set.remove(obj);
99 }
100
101 public boolean removeAll(Collection c) {
102 // Removes from this set all of its elements that are contained in the specified collection (optional operation).
103 return this.set.removeAll(c);
104 }
105
106 public boolean retainAll(Collection c) {
107 // Retains only the elements in this set that are contained in the specified collection (optional operation).
108 return this.set.retainAll(c);
109 }
110
111 public int size() {
112 // Returns the number of elements in this set (its cardinality).
113 return this.set.size();
114 }
115
116 public Object[] toArray() {
117 // Returns an array containing all of the elements in this this.set.
118 return this.set.toArray();
119 }
120
121 public Object[] toArray(Object[] arr) {
122 // Returns an array containing all of the elements in this set whose runtime type is that of the specified array.
123 return this.set.toArray(arr);
124 }
125
126 }
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