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Java > Open Source Codes > com > sun > xml > fastinfoset > util > FixedEntryStringIntMap


1 /*
2  * Fast Infoset ver. 0.1 software ("Software")
3  *
4  * Copyright, 2004-2005 Sun Microsystems, Inc. All Rights Reserved.
5  *
6  * Software is licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License. You may
8  * obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
14  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
15  * License for the specific language governing permissions and limitations.
16  *
17  * Sun supports and benefits from the global community of open source
18  * developers, and thanks the community for its important contributions and
19  * open standards-based technology, which Sun has adopted into many of its
20  * products.
21  *
22  * Please note that portions of Software may be provided with notices and
23  * open source licenses from such communities and third parties that govern the
24  * use of those portions, and any licenses granted hereunder do not alter any
25  * rights and obligations you may have under such open source licenses,
26  * however, the disclaimer of warranty and limitation of liability provisions
27  * in this License will apply to all Software in this distribution.
28  *
29  * You acknowledge that the Software is not designed, licensed or intended
30  * for use in the design, construction, operation or maintenance of any nuclear
31  * facility.
32  *
33  * Apache License
34  * Version 2.0, January 2004
35  * http://www.apache.org/licenses/
36  *
37  */
38
39
40 package com.sun.xml.fastinfoset.util;
41
42 import java.util.HashMap JavaDoc;
43 import java.util.Map JavaDoc;
44 import com.sun.xml.fastinfoset.CommonResourceBundle;
45
46 public class FixedEntryStringIntMap extends StringIntMap {
47     
48     private Entry _fixedEntry;
49
50     public FixedEntryStringIntMap(String JavaDoc fixedEntry, int initialCapacity, float loadFactor) {
51         super(initialCapacity, loadFactor);
52         
53         // Add the fixed entry
54 final int hash = hashHash(fixedEntry.hashCode());
55         final int tableIndex = indexFor(hash, _table.length);
56         _table[tableIndex] = _fixedEntry = new Entry(fixedEntry, hash, 0, null);
57         if (_size++ >= _threshold) {
58             resize(2 * _table.length);
59         }
60     }
61     
62     public FixedEntryStringIntMap(String JavaDoc fixedEntry, int initialCapacity) {
63         this(fixedEntry, initialCapacity, DEFAULT_LOAD_FACTOR);
64     }
65
66     public FixedEntryStringIntMap(String JavaDoc fixedEntry) {
67         this(fixedEntry, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR);
68     }
69
70     public final void clear() {
71         for (int i = 0; i < _table.length; i++) {
72             _table[i] = null;
73         }
74         if (_fixedEntry != null) {
75             final int tableIndex = indexFor(_fixedEntry._hash, _table.length);
76             _table[tableIndex] = _fixedEntry;
77             _fixedEntry._next = null;
78             _size = 1;
79         }
80     }
81
82     public final void setReadOnlyMap(KeyIntMap readOnlyMap, boolean clear) {
83         if (!(readOnlyMap instanceof FixedEntryStringIntMap)) {
84             throw new IllegalArgumentException JavaDoc(CommonResourceBundle.getInstance().
85                     getString("message.illegalClass", new Object JavaDoc[]{readOnlyMap}));
86         }
87         
88         setReadOnlyMap((FixedEntryStringIntMap)readOnlyMap, clear);
89     }
90     
91     public final void setReadOnlyMap(FixedEntryStringIntMap readOnlyMap, boolean clear) {
92         _readOnlyMap = readOnlyMap;
93         if (_readOnlyMap != null) {
94             readOnlyMap.removeFixedEntry();
95             _readOnlyMapSize = readOnlyMap.size();
96             if (clear) {
97                 clear();
98             }
99         } else {
100             _readOnlyMapSize = 0;
101         }
102     }
103     
104     private final void removeFixedEntry() {
105         if (_fixedEntry != null) {
106             final int tableIndex = indexFor(_fixedEntry._hash, _table.length);
107             final Entry firstEntry = _table[tableIndex];
108             if (firstEntry == _fixedEntry) {
109                 _table[tableIndex] = _fixedEntry._next;
110             } else {
111                 Entry previousEntry = firstEntry;
112                 while (previousEntry._next != _fixedEntry) {
113                     previousEntry = previousEntry._next;
114                 }
115                 previousEntry._next = _fixedEntry._next;
116             }
117             
118             _fixedEntry = null;
119             _size--;
120         }
121     }
122 }
123
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