| /* |
| * 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.payloads; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.MockTokenizer; |
| import org.apache.lucene.analysis.TokenFilter; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.Tokenizer; |
| 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.document.Document; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.index.RandomIndexWriter; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.TermQuery; |
| import org.apache.lucene.search.similarities.ClassicSimilarity; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.LuceneTestCase; |
| |
| public class TestPayloadSpanUtil extends LuceneTestCase { |
| |
| public static final String FIELD = "f"; |
| |
| public void testPayloadSpanUtil() throws Exception { |
| Directory directory = newDirectory(); |
| RandomIndexWriter writer = new RandomIndexWriter(random(), directory, |
| newIndexWriterConfig(new PayloadAnalyzer()).setSimilarity(new ClassicSimilarity())); |
| |
| Document doc = new Document(); |
| doc.add(newTextField(FIELD, "xx rr yy mm pp", Field.Store.YES)); |
| writer.addDocument(doc); |
| |
| IndexReader reader = writer.getReader(); |
| writer.close(); |
| IndexSearcher searcher = newSearcher(reader); |
| |
| PayloadSpanUtil psu = new PayloadSpanUtil(searcher.getTopReaderContext()); |
| |
| Collection<byte[]> payloads = psu.getPayloadsForQuery(new TermQuery(new Term(FIELD, "rr"))); |
| if(VERBOSE) { |
| System.out.println("Num payloads:" + payloads.size()); |
| for (final byte [] bytes : payloads) { |
| System.out.println(new String(bytes, StandardCharsets.UTF_8)); |
| } |
| } |
| reader.close(); |
| directory.close(); |
| } |
| |
| final static class PayloadAnalyzer extends Analyzer { |
| |
| @Override |
| public TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer result = new MockTokenizer(MockTokenizer.SIMPLE, true); |
| return new TokenStreamComponents(result, new PayloadFilter(result)); |
| } |
| } |
| |
| static final class PayloadFilter extends TokenFilter { |
| Set<String> entities = new HashSet<>(); |
| Set<String> nopayload = new HashSet<>(); |
| int pos; |
| PayloadAttribute payloadAtt; |
| CharTermAttribute termAtt; |
| PositionIncrementAttribute posIncrAtt; |
| |
| public PayloadFilter(TokenStream input) { |
| super(input); |
| pos = 0; |
| entities.add("xx"); |
| entities.add("one"); |
| nopayload.add("nopayload"); |
| nopayload.add("np"); |
| termAtt = addAttribute(CharTermAttribute.class); |
| posIncrAtt = addAttribute(PositionIncrementAttribute.class); |
| payloadAtt = addAttribute(PayloadAttribute.class); |
| } |
| |
| @Override |
| public boolean incrementToken() throws IOException { |
| if (input.incrementToken()) { |
| String token = termAtt.toString(); |
| |
| if (!nopayload.contains(token)) { |
| if (entities.contains(token)) { |
| payloadAtt.setPayload(new BytesRef(token + ":Entity:"+ pos )); |
| } else { |
| payloadAtt.setPayload(new BytesRef(token + ":Noise:" + pos )); |
| } |
| } |
| pos += posIncrAtt.getPositionIncrement(); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| super.reset(); |
| this.pos = 0; |
| } |
| } |
| |
| } |