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1
30
31
32 package org.hsqldb.lib;
33
34 import org.hsqldb.store.BaseHashMap;
35
36
43 public class HashMap extends BaseHashMap {
44
45 Set keySet;
46 Collection values;
47
48 public HashMap() {
49 this(16, 0.75f);
50 }
51
52 public HashMap(int initialCapacity) throws IllegalArgumentException  {
53 this(initialCapacity, 0.75f);
54 }
55
56 public HashMap(int initialCapacity,
57 float loadFactor) throws IllegalArgumentException {
58 super(initialCapacity, loadFactor, BaseHashMap.objectKeyOrValue,
59 BaseHashMap.objectKeyOrValue, false);
60 }
61
62 public Object get(Object key) {
63
64 int hash = key.hashCode();
65 int lookup = getLookup(key, hash);
66
67 if (lookup != -1) {
68 return objectValueTable[lookup];
69 }
70
71 return null;
72 }
73
74 public Object put(Object key, Object value) {
75 return super.addOrRemove(0, 0, key, value, false);
76 }
77
78 public Object remove(Object key) {
79 return super.removeObject(key);
80 }
81
82 public boolean containsKey(Object key) {
83 return super.containsKey(key);
84 }
85
86 public boolean containsValue(Object value) {
87 return super.containsValue(value);
88 }
89
90 public void putAll(HashMap t) {
91
92 Iterator it = t.keySet.iterator();
93
94 while (it.hasNext()) {
95 Object key = it.next();
96
97 put(key, t.get(key));
98 }
99 }
100
101 public Set keySet() {
102
103 if (keySet == null) {
104 keySet = new KeySet();
105 }
106
107 return keySet;
108 }
109
110 public Collection values() {
111
112 if (values == null) {
113 values = new Values();
114 }
115
116 return values;
117 }
118
119 class KeySet implements Set {
120
121 public Iterator iterator() {
122 return HashMap.this.new BaseHashIterator(true);
123 }
124
125 public int size() {
126 return HashMap.this.size();
127 }
128
129 public boolean contains(Object o) {
130 return containsKey(o);
131 }
132
133 public Object get(Object key) {
134
135 int lookup = HashMap.this.getLookup(key, key.hashCode());
136
137 if (lookup < 0) {
138 return null;
139 } else {
140 return HashMap.this.objectKeyTable[lookup];
141 }
142 }
143
144 public boolean add(Object value) {
145 throw new RuntimeException ();
146 }
147
148 public boolean addAll(Collection c) {
149 throw new RuntimeException ();
150 }
151
152 public boolean remove(Object o) {
153
154 int oldSize = size();
155
156 HashMap.this.remove(o);
157
158 return size() != oldSize;
159 }
160
161 public boolean isEmpty() {
162 return size() == 0;
163 }
164
165 public void clear() {
166 HashMap.this.clear();
167 }
168 }
169
170 class Values implements Collection {
171
172 public Iterator iterator() {
173 return HashMap.this.new BaseHashIterator(false);
174 }
175
176 public int size() {
177 return HashMap.this.size();
178 }
179
180 public boolean contains(Object o) {
181 throw new RuntimeException ();
182 }
183
184 public boolean add(Object value) {
185 throw new RuntimeException ();
186 }
187
188 public boolean addAll(Collection c) {
189 throw new RuntimeException ();
190 }
191
192 public boolean remove(Object o) {
193 throw new RuntimeException ();
194 }
195
196 public boolean isEmpty() {
197 return size() == 0;
198 }
199
200 public void clear() {
201 HashMap.this.clear();
202 }
203 }
204 }
205 |
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