|
1
28
29 package com.caucho.xml.stream;
30
31 import javax.xml.namespace.QName  ;
32
33
36 public class StaxIntern {
37 private static final int SIZE = 203;
38
39 private final Entry []_entries = new Entry[SIZE];
40
41 private final NamespaceReaderContext _namespaceContext;
42
43 StaxIntern(NamespaceReaderContext namespaceContext)
44 {
45 _namespaceContext = namespaceContext;
46 }
47
48 Entry add(char []buffer, int offset, int length, int colon,
49 boolean isAttribute)
50 {
51 int hash = 0;
52
53 for (int i = length - 1; i >= 0; i--) {
54 hash = 37 * hash + buffer[offset + i];
55 }
56
57 int bucket = (hash & 0x7fffffff) % SIZE;
58
59 Entry entry;
60
61 for (entry = _entries[bucket];
62 entry != null;
63 entry = entry._next) {
64 if (entry.match(buffer, offset, length, isAttribute))
65 return entry;
66 }
67
68 entry = new Entry(_entries[bucket],
69 buffer, offset, length,
70 colon,
71 isAttribute);
72 _entries[bucket] = entry;
73
74 return entry;
75 }
76
77 final class Entry {
78 final Entry _next;
79
80 final char []_buf;
81 final boolean _isAttribute;
82
83 final String _prefix;
84 final String _localName;
85
86 NamespaceBinding _namespace;
87 int _version;
88 QName _qName;
89
90 Entry(Entry next,
91 char []buf, int offset, int length,
92 int colon,
93 boolean isAttribute)
94 {
95 _next = next;
96
97 _buf = new char[length];
98 System.arraycopy(buf, offset, _buf, 0, length);
99
100 _isAttribute = isAttribute;
101
102 if (colon > 0) {
103 _prefix = new String (buf, 0, colon);
104 _localName = new String (buf, colon + 1, length - colon - 1);
105 }
106 else {
107 _prefix = null;
108 _localName = new String (buf, 0, length);
109 }
110
111 if (_isAttribute)
112 _namespace = _namespaceContext.getAttributeNamespace(_prefix);
113 else
114 _namespace = _namespaceContext.getElementNamespace(_prefix);
115
116 fillQName();
117 }
118
119 public final boolean match(char []buf, int offset, int length,
120 boolean isAttribute)
121 {
122 if (length != _buf.length || _isAttribute != isAttribute)
123 return false;
124
125 char []entryBuf = _buf;
126
127 for (length--; length >= 0; length--) {
128 if (entryBuf[length] != buf[offset + length])
129 return false;
130 }
131
132 return true;
133 }
134
135 String getLocalName()
136 {
137 return _localName;
138 }
139
140 String getPrefix()
141 {
142 return _prefix;
143 }
144
145 QName getQName()
146 {
147 if (_version != _namespace.getVersion())
148 fillQName();
149
150 return _qName;
151 }
152
153 private void fillQName()
154 {
155 _version = _namespace.getVersion();
156
157 String prefix = _prefix;
158
159 if (prefix == null)
160 prefix = "";
161
162 _qName = new QName (_namespace.getUri(), _localName, prefix);
163 }
164 }
165 }
166 |
Popular Tags |
Java API By Example, From Geeks To Geeks.