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1
9 package org.ozoneDB.DxLib;
10
11 import java.io.*;
12
13
19 public class DxMultiMap extends DxAbstractCollection implements DxMap, Externalizable {
20
21 final static long serialVersionUID = 1L;
22
23 protected transient DxMap map;
24 protected transient DxCollection containerFactory;
25 protected transient int multiItemCount = 0;
26
27
28 public DxMultiMap() {
29 map = new DxHashMap();
30 containerFactory = new DxArrayBag( 8 );
31 }
32
33
34 public DxMultiMap( DxMap _map, DxCollection _containerFactory ) {
35 map = _map;
36 containerFactory = _containerFactory;
37 }
38
39
40 public Object  clone() {
41 try {
42 DxMultiMap answer = (DxMultiMap)getClass().newInstance();
43 answer.map = (DxMap)map.getClass().newInstance();
44 answer.containerFactory = (DxCollection)containerFactory.getClass().newInstance();
45
46 DxIterator it = iterator();
47 Object obj;
48 while ((obj = it.next()) != null) {
49 DxCollection newColl = (DxCollection)((DxCollection)obj).clone();
50 answer.addForKey( newColl, it.key() );
51 }
52 return answer;
53 } catch (Exception e) {
54 throw new RuntimeException ( e.toString() );
55 }
56 }
57
58
59 public DxCollection valueClone() {
60 throw new RuntimeException ( getClass().getName() + ".valueClone() not implemented." );
61 }
62
63
64
67 public boolean equals( Object obj ) {
68 if (obj instanceof DxMultiMap && obj != null) {
69 DxMultiMap rhs = (DxMultiMap)obj;
70
71 if (this == obj) {
72 return true;
73 }
74
75 return false;
77 } else {
78 return false;
79 }
80 }
81
82
83 public DxSet keySet() {
84 return map.keySet();
85 }
86
87
88 public DxSet elementSet() {
89 DxSet answer = new DxHashSet();
90 answer.add( this );
91 return answer;
92 }
93
94
95 public synchronized boolean add( Object obj ) {
96 return addForKey( obj, buildKey( obj ) );
97 }
98
99
100 public Object buildKey( Object obj ) {
101 return obj;
102 }
103
104
105 public synchronized boolean addForKey( Object obj, Object key ) {
106 try {
107 DxCollection coll = (DxCollection)map.elementForKey( key );
108 if (coll == null) {
109 coll = (DxCollection)containerFactory.getClass().newInstance();
110 map.addForKey( coll, key );
111 }
112 coll.add( obj );
113 multiItemCount++;
114 return true;
115 } catch (Exception e) {
116 throw new RuntimeException ( e.toString() );
117 }
118 }
119
120
121 public DxCollection elementsForKey( Object key ) {
122 return (DxCollection)map.elementForKey( key );
123 }
124
125
126 public Object elementForKey( Object key ) {
127 return map.elementForKey( key );
128 }
129
130
131 public Object keyForElement( Object obj ) {
132 DxIterator it = iterator();
133 while (it.next() != null) {
134 DxIterator iit = iterator();
135 while (iit.next() != null) {
136 if (obj.equals( iit.object() )) {
137 return iit.key();
138 }
139 }
140 }
141 return null;
142 }
143
144
145 public synchronized Object removeForKey( Object key ) {
146 DxCollection answer = (DxCollection)map.removeForKey( key );
147 if (answer != null) {
148 multiItemCount--;
149 }
150 return answer;
151 }
152
153
154 public boolean removeAllKeys( DxCollection coll ) {
155 throw new RuntimeException ( getClass().getName() + ".removeAllKeys() not implemented." );
156 }
157
158
159 public boolean containsKey( Object key ) {
160 return map.containsKey( key );
161 }
162
163
164
165 public DxIterator iterator() {
166 return new DxMultiIterator( this );
167 }
168
169
170
171 public int count() {
172 return multiItemCount;
173 }
174
175
176
177 public boolean isEmpty() {
178 return multiItemCount == 0;
179 }
180
181
182 public synchronized void clear() {
183 map.clear();
184 multiItemCount = 0;
185 }
186
187
188 public void writeExternal( ObjectOutput out ) throws IOException {
189 out.writeInt( count() );
190 DxIterator it = iterator();
191 Object obj;
192 while ((obj = it.next()) != null) {
193 out.writeObject( obj );
194 out.writeObject( it.key() );
195 }
196 }
197
198
199 public synchronized void readExternal( ObjectInput in ) throws IOException, ClassNotFoundException {
200 int count = in.readInt();
201 for (; count > 0; count--) {
202 addForKey( in.readObject(), in.readObject() );
203 }
204 }
205
206 }
207 |
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