| /* |
| * 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.lucene.analysis; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PayloadAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute; |
| import org.apache.lucene.util.BytesRef; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| |
| |
| /** |
| * Wraps a whitespace tokenizer with a filter that sets |
| * the first token, and odd tokens to posinc=1, and all others |
| * to 0, encoding the position as pos: XXX in the payload. |
| **/ |
| public final class MockPayloadAnalyzer extends Analyzer { |
| |
| @Override |
| public TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer result = new MockTokenizer( MockTokenizer.WHITESPACE, true); |
| return new TokenStreamComponents(result, new MockPayloadFilter(result, fieldName)); |
| } |
| } |
| |
| /** |
| * |
| * |
| **/ |
| final class MockPayloadFilter extends TokenFilter { |
| String fieldName; |
| |
| int pos; |
| |
| int i; |
| |
| final PositionIncrementAttribute posIncrAttr; |
| final PayloadAttribute payloadAttr; |
| final CharTermAttribute termAttr; |
| |
| public MockPayloadFilter(TokenStream input, String fieldName) { |
| super(input); |
| this.fieldName = fieldName; |
| pos = 0; |
| i = 0; |
| posIncrAttr = input.addAttribute(PositionIncrementAttribute.class); |
| payloadAttr = input.addAttribute(PayloadAttribute.class); |
| termAttr = input.addAttribute(CharTermAttribute.class); |
| } |
| |
| @Override |
| public boolean incrementToken() throws IOException { |
| if (input.incrementToken()) { |
| payloadAttr.setPayload(new BytesRef(("pos: " + pos).getBytes(StandardCharsets.UTF_8))); |
| int posIncr; |
| if (pos == 0 || i % 2 == 1) { |
| posIncr = 1; |
| } else { |
| posIncr = 0; |
| } |
| posIncrAttr.setPositionIncrement(posIncr); |
| pos += posIncr; |
| i++; |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| super.reset(); |
| i = 0; |
| pos = 0; |
| } |
| } |
| |