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Lucene example source code file (TestSpanRegexQuery.java)

This example Lucene source code file (TestSpanRegexQuery.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

directory, document, document, exception, indexsearcher, indexsearcher, indexwriter, indexwriter, io, spanfirstquery, spannearquery, spanquery, spanregexquery, term, term

The Lucene TestSpanRegexQuery.java source code

package org.apache.lucene.search.regex;

/**
 * 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.
 */

import java.io.IOException;

import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MultiSearcher;
import org.apache.lucene.search.spans.SpanFirstQuery;
import org.apache.lucene.search.spans.SpanMultiTermQueryWrapper;
import org.apache.lucene.search.spans.SpanNearQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.util.LuceneTestCase;

public class TestSpanRegexQuery extends LuceneTestCase {
  
  Directory indexStoreA;
  Directory indexStoreB;
  
  @Override
  public void setUp() throws Exception {
    super.setUp();
    indexStoreA = newDirectory();
    indexStoreB = newDirectory();
  }
  
  @Override
  public void tearDown() throws Exception {
    indexStoreA.close();
    indexStoreB.close();
    super.tearDown();
  }
  
  public void testSpanRegex() throws Exception {
    Directory directory = newDirectory();
    IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random)));
    Document doc = new Document();
    // doc.add(newField("field", "the quick brown fox jumps over the lazy dog",
    // Field.Store.NO, Field.Index.ANALYZED));
    // writer.addDocument(doc);
    // doc = new Document();
    doc.add(newField("field", "auto update", Field.Store.NO,
        Field.Index.ANALYZED));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(newField("field", "first auto update", Field.Store.NO,
        Field.Index.ANALYZED));
    writer.addDocument(doc);
    writer.optimize();
    writer.close();

    IndexSearcher searcher = new IndexSearcher(directory, true);
    SpanQuery srq = new SpanMultiTermQueryWrapper<RegexQuery>(new RegexQuery(new Term("field", "aut.*")));
    SpanFirstQuery sfq = new SpanFirstQuery(srq, 1);
    // SpanNearQuery query = new SpanNearQuery(new SpanQuery[] {srq, stq}, 6,
    // true);
    int numHits = searcher.search(sfq, null, 1000).totalHits;
    assertEquals(1, numHits);
    searcher.close();
    directory.close();
  }
  
  public void testSpanRegexBug() throws CorruptIndexException, IOException {
    createRAMDirectories();

    SpanQuery srq = new SpanMultiTermQueryWrapper<RegexQuery>(new RegexQuery(new Term("field", "a.*")));
    SpanQuery stq = new SpanMultiTermQueryWrapper<RegexQuery>(new RegexQuery(new Term("field", "b.*")));
    SpanNearQuery query = new SpanNearQuery(new SpanQuery[] { srq, stq }, 6,
        true);

    // 1. Search the same store which works
    IndexSearcher[] arrSearcher = new IndexSearcher[2];
    arrSearcher[0] = new IndexSearcher(indexStoreA, true);
    arrSearcher[1] = new IndexSearcher(indexStoreB, true);
    MultiSearcher searcher = new MultiSearcher(arrSearcher);
    int numHits = searcher.search(query, null, 1000).totalHits;
    arrSearcher[0].close();
    arrSearcher[1].close();

    // Will fail here
    // We expect 2 but only one matched
    // The rewriter function only write it once on the first IndexSearcher
    // So it's using term: a1 b1 to search on the second IndexSearcher
    // As a result, it won't match the document in the second IndexSearcher
    assertEquals(2, numHits);
  }
  
  /** remove in lucene 4.0 */
  @Deprecated
  public void testSpanRegexOld() throws Exception {
    Directory directory = newDirectory();
    IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random)));
    Document doc = new Document();
    // doc.add(newField("field", "the quick brown fox jumps over the lazy dog",
    // Field.Store.NO, Field.Index.ANALYZED));
    // writer.addDocument(doc);
    // doc = new Document();
    doc.add(newField("field", "auto update", Field.Store.NO,
        Field.Index.ANALYZED));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(newField("field", "first auto update", Field.Store.NO,
        Field.Index.ANALYZED));
    writer.addDocument(doc);
    writer.optimize();
    writer.close();

    IndexSearcher searcher = new IndexSearcher(directory, true);
    SpanRegexQuery srq = new SpanRegexQuery(new Term("field", "aut.*"));
    SpanFirstQuery sfq = new SpanFirstQuery(srq, 1);
    // SpanNearQuery query = new SpanNearQuery(new SpanQuery[] {srq, stq}, 6,
    // true);
    int numHits = searcher.search(sfq, null, 1000).totalHits;
    assertEquals(1, numHits);
    searcher.close();
    directory.close();
  }

  /** remove in lucene 4.0 */
  @Deprecated
  public void testSpanRegexBugOld() throws CorruptIndexException, IOException {
    createRAMDirectories();

    SpanRegexQuery srq = new SpanRegexQuery(new Term("field", "a.*"));
    SpanRegexQuery stq = new SpanRegexQuery(new Term("field", "b.*"));
    SpanNearQuery query = new SpanNearQuery(new SpanQuery[] { srq, stq }, 6,
        true);

    // 1. Search the same store which works
    IndexSearcher[] arrSearcher = new IndexSearcher[2];
    arrSearcher[0] = new IndexSearcher(indexStoreA, true);
    arrSearcher[1] = new IndexSearcher(indexStoreB, true);
    MultiSearcher searcher = new MultiSearcher(arrSearcher);
    int numHits = searcher.search(query, null, 1000).totalHits;
    arrSearcher[0].close();
    arrSearcher[1].close();

    // Will fail here
    // We expect 2 but only one matched
    // The rewriter function only write it once on the first IndexSearcher
    // So it's using term: a1 b1 to search on the second IndexSearcher
    // As a result, it won't match the document in the second IndexSearcher
    assertEquals(2, numHits);
  }

  private void createRAMDirectories() throws CorruptIndexException,
      LockObtainFailedException, IOException {
    // creating a document to store
    Document lDoc = new Document();
    lDoc.add(newField("field", "a1 b1", Field.Store.NO,
        Field.Index.ANALYZED_NO_NORMS));

    // creating a document to store
    Document lDoc2 = new Document();
    lDoc2.add(newField("field", "a2 b2", Field.Store.NO,
        Field.Index.ANALYZED_NO_NORMS));

    // creating first index writer
    IndexWriter writerA = new IndexWriter(indexStoreA, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random)).setOpenMode(OpenMode.CREATE));
    writerA.addDocument(lDoc);
    writerA.optimize();
    writerA.close();

    // creating second index writer
    IndexWriter writerB = new IndexWriter(indexStoreB, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random)).setOpenMode(OpenMode.CREATE));
    writerB.addDocument(lDoc2);
    writerB.optimize();
    writerB.close();
  }
}

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