1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.domain.search.impl;
import java.io.IOException;
import java.io.Reader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
/**
*
* @version $Rev$ $Date$
*/
public class DomainPathAnalyzer extends Analyzer {
final public static char PATH_START = '\u0001';
final public static char PATH_SEPARATOR = '\u0002';
final public static char TYPE_SEPARATOR = '\u0003';
final public static char URI_SEPARATOR = '\u0004';
final public static char ARCHIVE_SEPARATOR = '!';
static class DomainPathTokenizer extends Tokenizer {
private int offset = 0, bufferIndex = 0, dataLen = 0;
private static final int MAX_WORD_LEN = 1024;
private static final int IO_BUFFER_SIZE = 4096;
private final char[] ioBuffer = new char[IO_BUFFER_SIZE];
private boolean typeCharFound = false;
private boolean uriCharFound = false;
public DomainPathTokenizer(Reader reader) {
super(reader);
}
@Override
public void reset() throws IOException {
super.reset();
typeCharFound = false;
uriCharFound = false;
}
@Override
public void reset(Reader input) throws IOException {
super.reset(input);
uriCharFound = false;
typeCharFound = false;
}
@Override
public Token next(Token reusableToken) throws IOException {
assert reusableToken != null;
reusableToken.clear();
int length = 0;
int start = bufferIndex;
char[] buffer = reusableToken.termBuffer();
boolean lowercaseCharFound = false;
boolean digitFound = false;
while (true) {
if (bufferIndex >= dataLen) {
offset += dataLen;
int incr;
if (lowercaseCharFound || length == 0) {
incr = 0;
} else {
incr = 2;
ioBuffer[0] = ioBuffer[bufferIndex - 1];
ioBuffer[1] = ioBuffer[bufferIndex];
}
dataLen = input.read(ioBuffer, incr, ioBuffer.length - incr);
if (dataLen == -1) {
if (length > 0)
break;
else
return null;
}
bufferIndex = incr;
dataLen += incr;
}
final char c = ioBuffer[bufferIndex++];
boolean breakChar = true;
boolean includeChar = false;
if (c == PATH_START || c == PATH_SEPARATOR) {
if (length == 0) {
includeChar = true;
} else {
bufferIndex--;
}
typeCharFound = false;
uriCharFound = false;
} else if (c == TYPE_SEPARATOR && !typeCharFound || c == URI_SEPARATOR && !uriCharFound) {
length = 0;
breakChar = false;
lowercaseCharFound = false;
digitFound = false;
} else {
if (Character.isDigit(c)) {
if (digitFound || length == 0) {
breakChar = false;
digitFound = true;
} else {
bufferIndex--;
}
// TODO: normalize accent, it does not index accents for
// now
} else if (c >= 65 && c <= 90 || c >= 97 && c <= 122) {
if (digitFound) {
bufferIndex--;
} else if (Character.isLowerCase(c)) {
if (!(lowercaseCharFound || length <= 1)) {
length--;
bufferIndex -= 2;
} else {
lowercaseCharFound = true;
breakChar = false;
}
} else if (!lowercaseCharFound) { // && uppercase
breakChar = false;
} else {
bufferIndex--;
}
}
}
if (!breakChar || includeChar) {
if (length == 0) // start of token
start = offset + bufferIndex - 1;
else if (length == buffer.length)
buffer = reusableToken.resizeTermBuffer(1 + length);
if (c == TYPE_SEPARATOR && !typeCharFound) {
typeCharFound = true;
} else if (c == URI_SEPARATOR && !uriCharFound) {
typeCharFound = true;
} else {
buffer[length++] = Character.toLowerCase(c); // buffer
// it,
// normalized
}
if (length == MAX_WORD_LEN || (breakChar && length > 0)) // buffer
// overflow!
break;
} else if (length > 0) {// at non-Letter w/ chars
break; // return 'em
}
}
reusableToken.setTermLength(length);
reusableToken.setStartOffset(start);
reusableToken.setEndOffset(start + length);
return reusableToken;
}
}
public TokenStream tokenStream(String fieldName, Reader reader) {
return new DomainPathTokenizer(reader);
}
public TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException {
Tokenizer tokenizer = (Tokenizer)getPreviousTokenStream();
if (tokenizer == null) {
tokenizer = new DomainPathTokenizer(reader);
setPreviousTokenStream(tokenizer);
} else
tokenizer.reset(reader);
return tokenizer;
}
}
|
