| /* |
| * 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.queries.payloads; |
| |
| import org.apache.lucene.analysis.*; |
| import org.apache.lucene.analysis.tokenattributes.PayloadAttribute; |
| import org.apache.lucene.index.DirectoryReader; |
| import org.apache.lucene.index.IndexWriterConfig; |
| import org.apache.lucene.index.IndexWriter; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.document.TextField; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.English; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.similarities.Similarity; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.MockDirectoryWrapper; |
| import org.apache.lucene.store.RAMDirectory; |
| |
| import java.io.IOException; |
| import java.util.Random; |
| |
| /** |
| * |
| * |
| **/ |
| public class PayloadHelper { |
| |
| private byte[] payloadField = new byte[]{1}; |
| private byte[] payloadMultiField1 = new byte[]{2}; |
| private byte[] payloadMultiField2 = new byte[]{4}; |
| public static final String NO_PAYLOAD_FIELD = "noPayloadField"; |
| public static final String MULTI_FIELD = "multiField"; |
| public static final String FIELD = "field"; |
| |
| public IndexReader reader; |
| |
| public final class PayloadAnalyzer extends Analyzer { |
| |
| public PayloadAnalyzer() { |
| super(PER_FIELD_REUSE_STRATEGY); |
| } |
| |
| @Override |
| public TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer result = new MockTokenizer(MockTokenizer.SIMPLE, true); |
| return new TokenStreamComponents(result, new PayloadFilter(result, fieldName)); |
| } |
| } |
| |
| public final class PayloadFilter extends TokenFilter { |
| private final String fieldName; |
| private int numSeen = 0; |
| private final PayloadAttribute payloadAtt; |
| |
| public PayloadFilter(TokenStream input, String fieldName) { |
| super(input); |
| this.fieldName = fieldName; |
| payloadAtt = addAttribute(PayloadAttribute.class); |
| } |
| |
| @Override |
| public boolean incrementToken() throws IOException { |
| |
| if (input.incrementToken()) { |
| if (fieldName.equals(FIELD)) { |
| payloadAtt.setPayload(new BytesRef(payloadField)); |
| } else if (fieldName.equals(MULTI_FIELD)) { |
| if (numSeen % 2 == 0) { |
| payloadAtt.setPayload(new BytesRef(payloadMultiField1)); |
| } |
| else { |
| payloadAtt.setPayload(new BytesRef(payloadMultiField2)); |
| } |
| numSeen++; |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| super.reset(); |
| this.numSeen = 0; |
| } |
| } |
| |
| /** |
| * Sets up a RAMDirectory, and adds documents (using English.intToEnglish()) with two fields: field and multiField |
| * and analyzes them using the PayloadAnalyzer |
| * @param similarity The Similarity class to use in the Searcher |
| * @param numDocs The num docs to add |
| * @return An IndexSearcher |
| */ |
| // TODO: randomize |
| public IndexSearcher setUp(Random random, Similarity similarity, int numDocs) throws IOException { |
| Directory directory = new MockDirectoryWrapper(random, new RAMDirectory()); |
| PayloadAnalyzer analyzer = new PayloadAnalyzer(); |
| |
| // TODO randomize this |
| IndexWriter writer = new IndexWriter(directory, new IndexWriterConfig( |
| analyzer).setSimilarity(similarity)); |
| // writer.infoStream = System.out; |
| for (int i = 0; i < numDocs; i++) { |
| Document doc = new Document(); |
| doc.add(new TextField(FIELD, English.intToEnglish(i), Field.Store.YES)); |
| doc.add(new TextField(MULTI_FIELD, English.intToEnglish(i) + " " + English.intToEnglish(i), Field.Store.YES)); |
| doc.add(new TextField(NO_PAYLOAD_FIELD, English.intToEnglish(i), Field.Store.YES)); |
| writer.addDocument(doc); |
| } |
| writer.forceMerge(1); |
| reader = DirectoryReader.open(writer); |
| writer.close(); |
| |
| IndexSearcher searcher = LuceneTestCase.newSearcher(LuceneTestCase.getOnlyLeafReader(reader)); |
| searcher.setSimilarity(similarity); |
| return searcher; |
| } |
| |
| public void tearDown() throws Exception { |
| reader.close(); |
| } |
| } |