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Lucene example source code file (ChainedFilterTest.java)

This example Lucene source code file (ChainedFilterTest.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

cachingwrapperfilter, chainedfilter, chainedfilter, exception, exception, filter, filter, max, max, querywrapperfilter, randomindexwriter, term, termquery, topdocs, util

The Lucene ChainedFilterTest.java source code

package org.apache.lucene.search;

/**
 * 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.util.Calendar;
import java.util.GregorianCalendar;

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.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.CachingWrapperFilter;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryWrapperFilter;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TermRangeFilter;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;

public class ChainedFilterTest extends LuceneTestCase {
  public static final int MAX = 500;

  private Directory directory;
  private IndexSearcher searcher;
  private IndexReader reader;
  private Query query;
  // private DateFilter dateFilter;   DateFilter was deprecated and removed
  private TermRangeFilter dateFilter;
  private QueryWrapperFilter bobFilter;
  private QueryWrapperFilter sueFilter;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    directory = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random, directory);
    Calendar cal = new GregorianCalendar();
    cal.clear();
    cal.setTimeInMillis(1041397200000L); // 2003 January 01

    for (int i = 0; i < MAX; i++) {
      Document doc = new Document();
      doc.add(newField("key", "" + (i + 1), Field.Store.YES, Field.Index.NOT_ANALYZED));
      doc.add(newField("owner", (i < MAX / 2) ? "bob" : "sue", Field.Store.YES, Field.Index.NOT_ANALYZED));
      doc.add(newField("date", cal.getTime().toString(), Field.Store.YES, Field.Index.NOT_ANALYZED));
      writer.addDocument(doc);

      cal.add(Calendar.DATE, 1);
    }
    reader = writer.getReader();
    writer.close();

    searcher = newSearcher(reader);

    // query for everything to make life easier
    BooleanQuery bq = new BooleanQuery();
    bq.add(new TermQuery(new Term("owner", "bob")), BooleanClause.Occur.SHOULD);
    bq.add(new TermQuery(new Term("owner", "sue")), BooleanClause.Occur.SHOULD);
    query = bq;

    // date filter matches everything too
    //Date pastTheEnd = parseDate("2099 Jan 1");
    // dateFilter = DateFilter.Before("date", pastTheEnd);
    // just treat dates as strings and select the whole range for now...
    dateFilter = new TermRangeFilter("date","","ZZZZ",true,true);

    bobFilter = new QueryWrapperFilter(
        new TermQuery(new Term("owner", "bob")));
    sueFilter = new QueryWrapperFilter(
        new TermQuery(new Term("owner", "sue")));
  }

  @Override
  public void tearDown() throws Exception {
    searcher.close();
    reader.close();
    directory.close();
    super.tearDown();
  }

  private ChainedFilter getChainedFilter(Filter[] chain, int[] logic) {
    if (logic == null) {
      return new ChainedFilter(chain);
    } else {
      return new ChainedFilter(chain, logic);
    }
  }

  private ChainedFilter getChainedFilter(Filter[] chain, int logic) {
    return new ChainedFilter(chain, logic);
  }

  
  public void testSingleFilter() throws Exception {
    ChainedFilter chain = getChainedFilter(new Filter[] {dateFilter}, null);

    int numHits = searcher.search(query, chain, 1000).totalHits;
    assertEquals(MAX, numHits);

    chain = new ChainedFilter(new Filter[] {bobFilter});
    numHits = searcher.search(query, chain, 1000).totalHits;
    assertEquals(MAX / 2, numHits);
    
    chain = getChainedFilter(new Filter[] {bobFilter}, new int[] {ChainedFilter.AND});
    TopDocs hits = searcher.search(query, chain, 1000);
    numHits = hits.totalHits;
    assertEquals(MAX / 2, numHits);
    assertEquals("bob", searcher.doc(hits.scoreDocs[0].doc).get("owner"));
    
    chain = getChainedFilter(new Filter[] {bobFilter}, new int[] {ChainedFilter.ANDNOT});
    hits = searcher.search(query, chain, 1000);
    numHits = hits.totalHits;
    assertEquals(MAX / 2, numHits);
    assertEquals("sue", searcher.doc(hits.scoreDocs[0].doc).get("owner"));
  }

  public void testOR() throws Exception {
    ChainedFilter chain = getChainedFilter(
      new Filter[] {sueFilter, bobFilter}, null);

    int numHits = searcher.search(query, chain, 1000).totalHits;
    assertEquals("OR matches all", MAX, numHits);
  }

  public void testAND() throws Exception {
    ChainedFilter chain = getChainedFilter(
      new Filter[] {dateFilter, bobFilter}, ChainedFilter.AND);

    TopDocs hits = searcher.search(query, chain, 1000);
    assertEquals("AND matches just bob", MAX / 2, hits.totalHits);
    assertEquals("bob", searcher.doc(hits.scoreDocs[0].doc).get("owner"));
  }

  public void testXOR() throws Exception {
    ChainedFilter chain = getChainedFilter(
      new Filter[]{dateFilter, bobFilter}, ChainedFilter.XOR);

    TopDocs hits = searcher.search(query, chain, 1000);
    assertEquals("XOR matches sue", MAX / 2, hits.totalHits);
    assertEquals("sue", searcher.doc(hits.scoreDocs[0].doc).get("owner"));
  }

  public void testANDNOT() throws Exception {
    ChainedFilter chain = getChainedFilter(
      new Filter[]{dateFilter, sueFilter},
        new int[] {ChainedFilter.AND, ChainedFilter.ANDNOT});

    TopDocs hits = searcher.search(query, chain, 1000);
    assertEquals("ANDNOT matches just bob",
        MAX / 2, hits.totalHits);
    assertEquals("bob", searcher.doc(hits.scoreDocs[0].doc).get("owner"));
    
    chain = getChainedFilter(
        new Filter[]{bobFilter, bobFilter},
          new int[] {ChainedFilter.ANDNOT, ChainedFilter.ANDNOT});

      hits = searcher.search(query, chain, 1000);
      assertEquals("ANDNOT bob ANDNOT bob matches all sues",
          MAX / 2, hits.totalHits);
      assertEquals("sue", searcher.doc(hits.scoreDocs[0].doc).get("owner"));
  }

  /*
  private Date parseDate(String s) throws ParseException {
    return new SimpleDateFormat("yyyy MMM dd", Locale.US).parse(s);
  }
  */
  
  public void testWithCachingFilter() throws Exception {
    Directory dir = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random, dir);
    IndexReader reader = writer.getReader();
    writer.close();
  
    IndexSearcher searcher = newSearcher(reader);
  
    Query query = new TermQuery(new Term("none", "none"));
  
    QueryWrapperFilter queryFilter = new QueryWrapperFilter(query);
    CachingWrapperFilter cachingFilter = new CachingWrapperFilter(queryFilter);
  
    searcher.search(query, cachingFilter, 1);
  
    CachingWrapperFilter cachingFilter2 = new CachingWrapperFilter(queryFilter);
    Filter[] chain = new Filter[2];
    chain[0] = cachingFilter;
    chain[1] = cachingFilter2;
    ChainedFilter cf = new ChainedFilter(chain);
  
    // throws java.lang.ClassCastException: org.apache.lucene.util.OpenBitSet cannot be cast to java.util.BitSet
    searcher.search(new MatchAllDocsQuery(), cf, 1);
    searcher.close();
    reader.close();
    dir.close();
  }

}

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