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18 package org.apache.activemq.kaha.impl.container;
19
20 import java.util.ArrayList  ;
21 import java.util.Collection ;
22 import java.util.Iterator ;
23 import java.util.List ;
24 import java.util.Set ;
25 import org.apache.activemq.kaha.impl.index.IndexItem;
26 import org.apache.activemq.kaha.impl.index.IndexLinkedList;
27
28
33 public class ContainerKeySet extends ContainerCollectionSupport implements Set {
34
35
36 ContainerKeySet(MapContainerImpl container){
37 super(container);
38 }
39
40
41 public boolean contains(Object o){
42 return container.containsKey(o);
43 }
44
45 public Iterator iterator(){
46 return new ContainerKeySetIterator(container);
47 }
48
49 public Object [] toArray(){
50 List list = new ArrayList ();
51 IndexItem item = container.getInternalList().getRoot();
52 while ((item = container.getInternalList().getNextEntry(item)) != null) {
53 list.add(container.getKey(item));
54 }
55 return list.toArray();
56 }
57
58 public Object [] toArray(Object [] a){
59 List list = new ArrayList ();
60 IndexItem item = container.getInternalList().getRoot();
61 while ((item = container.getInternalList().getNextEntry(item)) != null) {
62 list.add(container.getKey(item));
63 }
64 return list.toArray(a);
65 }
66
67 public boolean add(Object o){
68 throw new UnsupportedOperationException ("Cannot add here");
69 }
70
71 public boolean remove(Object o){
72 return container.remove(o) != null;
73 }
74
75 public boolean containsAll(Collection c){
76 boolean result = true;
77 for (Object key:c) {
78 if (!(result&=container.containsKey(key))) {
79 break;
80 }
81 }
82 return result;
83 }
84
85 public boolean addAll(Collection c){
86 throw new UnsupportedOperationException ("Cannot add here");
87 }
88
89 public boolean retainAll(Collection c){
90 List tmpList = new ArrayList ();
91 for (Iterator i = c.iterator(); i.hasNext(); ){
92 Object o = i.next();
93 if (!contains(o)){
94 tmpList.add(o);
95 }
96 }
97 for(Iterator i = tmpList.iterator(); i.hasNext();){
98 remove(i.next());
99 }
100 return !tmpList.isEmpty();
101 }
102
103 public boolean removeAll(Collection c){
104 boolean result = true;
105 for (Iterator i = c.iterator(); i.hasNext(); ){
106 if (!remove(i.next())){
107 result = false;
108 }
109 }
110 return result;
111 }
112
113 public void clear(){
114 container.clear();
115 }
116
117 public String toString() {
118 String result ="ContainerKeySet[";
119 IndexItem item = container.getInternalList().getRoot();
120 while ((item = container.getInternalList().getNextEntry(item)) != null) {
121 result += container.getKey(item);
122 result += ",";
123 }
124 result +="]";
125 return result;
126 }
127 }
128 |
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