01: package org.apache.lucene.analysis.payloads;
02:
03: /**
04: * Licensed to the Apache Software Foundation (ASF) under one or more
05: * contributor license agreements. See the NOTICE file distributed with
06: * this work for additional information regarding copyright ownership.
07: * The ASF licenses this file to You under the Apache License, Version 2.0
08: * (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: *
11: * http://www.apache.org/licenses/LICENSE-2.0
12: *
13: * Unless required by applicable law or agreed to in writing, software
14: * distributed under the License is distributed on an "AS IS" BASIS,
15: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16: * See the License for the specific language governing permissions and
17: * limitations under the License.
18: */
19:
20: import org.apache.lucene.analysis.Token;
21: import org.apache.lucene.analysis.TokenFilter;
22: import org.apache.lucene.analysis.TokenStream;
23: import org.apache.lucene.index.Payload;
24:
25: import java.io.IOException;
26:
27: /**
28: * Adds the {@link org.apache.lucene.analysis.Token#setStartOffset(int)}
29: * and {@link org.apache.lucene.analysis.Token#setEndOffset(int)}
30: * First 4 bytes are the start
31: *
32: **/
33: public class TokenOffsetPayloadTokenFilter extends TokenFilter {
34:
35: public TokenOffsetPayloadTokenFilter(TokenStream input) {
36: super (input);
37: }
38:
39: public Token next(Token result) throws IOException {
40: result = input.next(result);
41: if (result != null) {
42: byte[] data = new byte[8];
43: PayloadHelper.encodeInt(result.startOffset(), data, 0);
44: PayloadHelper.encodeInt(result.endOffset(), data, 4);
45: Payload payload = new Payload(data);
46: result.setPayload(payload);
47: }
48: return result;
49: }
50: }
|