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.Collection;
36 import java.util.Iterator;
37
38 /***
39 * A Set which wraps another Set. Intended mainly to
40 * be used as a superclass.
41 */
42 public class ProxySet implements Set {
43
44 private Set set;
45
46 public ProxySet(Set set) {
47 this.set = set;
48 }
49
50 public boolean add(Object obj) {
51 // Adds the specified element to this set if it is not already present (optional operation).
52 return this.set.add(obj);
53 }
54
55 public boolean addAll(Collection c) {
56 // Adds all of the elements in the specified collection to this set if they're not already present (optional operation).
57 return this.set.addAll(c);
58 }
59
60 public void clear() {
61 // Removes all of the elements from this set (optional operation).
62 this.set.clear();
63 }
64
65 public boolean contains(Object obj) {
66 // Returns true if this set contains the specified element.
67 return this.set.contains(obj);
68 }
69
70 public boolean containsAll(Collection c) {
71 // Returns true if this set contains all of the elements of the specified collection.
72 return this.set.containsAll(c);
73 }
74
75 public boolean equals(Object obj) {
76 // Compares the specified object with this set for equality.
77 return this.set.equals(obj);
78 }
79
80 public int hashCode() {
81 // Returns the hash code value for this this.set.
82 return this.set.hashCode();
83 }
84
85 public boolean isEmpty() {
86 // Returns true if this set contains no elements.
87 return this.set.isEmpty();
88 }
89
90 public Iterator iterator() {
91 // Returns an iterator over the elements in this this.set.
92 return this.set.iterator();
93 }
94
95 public boolean remove(Object obj) {
96 // Removes the specified element from this set if it is present (optional operation).
97 return this.set.remove(obj);
98 }
99
100 public boolean removeAll(Collection c) {
101 // Removes from this set all of its elements that are contained in the specified collection (optional operation).
102 return this.set.removeAll(c);
103 }
104
105 public boolean retainAll(Collection c) {
106 // Retains only the elements in this set that are contained in the specified collection (optional operation).
107 return this.set.retainAll(c);
108 }
109
110 public int size() {
111 // Returns the number of elements in this set (its cardinality).
112 return this.set.size();
113 }
114
115 public Object[] toArray() {
116 // Returns an array containing all of the elements in this this.set.
117 return this.set.toArray();
118 }
119
120 public Object[] toArray(Object[] arr) {
121 // Returns an array containing all of the elements in this set whose runtime type is that of the specified array.
122 return this.set.toArray(arr);
123 }
124
125 }