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1
11
12 package org.eclipse.jface.internal.databinding.provisional.observable.set;
13
14 import java.util.Collection  ;
15 import java.util.Collections ;
16 import java.util.HashSet ;
17 import java.util.Iterator ;
18 import java.util.Set ;
19
20 import org.eclipse.jface.internal.databinding.provisional.observable.Diffs;
21
22
26 public class WritableSet extends ObservableSet {
27
28
31 public WritableSet() {
32 this(Object .class);
33 }
34
35
38 public WritableSet(Collection c) {
39 this(c, Object .class);
40 }
41
42
46 public WritableSet(Collection c, Object elementType) {
47 super(new HashSet (c), elementType);
48 this.elementType = elementType;
49 }
50
51
54 public WritableSet(Object elementType) {
55 super(new HashSet (), elementType);
56 }
57
58 public boolean add(Object o) {
59 boolean added = wrappedSet.add(o);
60 if (added) {
61 fireSetChange(Diffs.createSetDiff(Collections.singleton(o), Collections.EMPTY_SET));
62 }
63 return added;
64 }
65
66 public boolean addAll(Collection c) {
67 Set adds = new HashSet ();
68 Iterator it = c.iterator();
69 while (it.hasNext()) {
70 Object element = it.next();
71 if (wrappedSet.add(element)) {
72 adds.add(element);
73 }
74 }
75 if (adds.size() > 0) {
76 fireSetChange(Diffs.createSetDiff(adds, Collections.EMPTY_SET));
77 return true;
78 }
79 return false;
80 }
81
82 public boolean remove(Object o) {
83 boolean removed = wrappedSet.remove(o);
84 if (removed) {
85 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, Collections
86 .singleton(o)));
87 }
88 return removed;
89 }
90
91 public boolean removeAll(Collection c) {
92 Set removes = new HashSet ();
93 Iterator it = c.iterator();
94 while (it.hasNext()) {
95 Object element = it.next();
96 if (wrappedSet.remove(element)) {
97 removes.add(element);
98 }
99 }
100 if (removes.size() > 0) {
101 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removes));
102 return true;
103 }
104 return false;
105 }
106
107 public boolean retainAll(Collection c) {
108 Set removes = new HashSet ();
109 Iterator it = wrappedSet.iterator();
110 while (it.hasNext()) {
111 Object element = it.next();
112 if (!c.contains(element)) {
113 it.remove();
114 removes.add(element);
115 }
116 }
117 if (removes.size() > 0) {
118 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removes));
119 return true;
120 }
121 return false;
122 }
123
124 public void clear() {
125 Set removes = new HashSet (wrappedSet);
126 wrappedSet.clear();
127 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removes));
128 }
129
130 }
131 |
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