aos.lucene.search.advanced.IndexSearcherTest.java Source code

Introduction

Here is the source code for aos.lucene.search.advanced.IndexSearcherTest.java

Source

/****************************************************************
 * Licensed to the AOS Community (AOS) under one or more        *
 * contributor license agreements.  See the NOTICE file         *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The AOS 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 aos.lucene.search.advanced;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import junit.framework.TestCase;

// From chapter 5
public class IndexSearcherTest extends TestCase {
    private IndexSearcher[] searchers;

    public void setUp() throws Exception {
        String[] animals = { "aardvark", "beaver", "coati", "dog", "elephant", "frog", "gila monster", "horse",
                "iguana", "javelina", "kangaroo", "lemur", "moose", "nematode", "orca", "python", "quokka", "rat",
                "scorpion", "tarantula", "uromastyx", "vicuna", "walrus", "xiphias", "yak", "zebra" };

        Analyzer analyzer = new WhitespaceAnalyzer(Version.LUCENE_46);

        Directory aTOmDirectory = new RAMDirectory(); //
        Directory nTOzDirectory = new RAMDirectory(); //

        IndexWriter aTOmWriter = new IndexWriter(aTOmDirectory, analyzer, IndexWriter.MaxFieldLength.UNLIMITED);
        IndexWriter nTOzWriter = new IndexWriter(nTOzDirectory, analyzer, IndexWriter.MaxFieldLength.UNLIMITED);

        for (int i = animals.length - 1; i >= 0; i--) {
            Document doc = new Document();
            String animal = animals[i];
            doc.add(new Field("animal", animal, Field.Store.YES, Field.Index.NOT_ANALYZED));
            if (animal.charAt(0) < 'n') {
                aTOmWriter.addDocument(doc); //
            } else {
                nTOzWriter.addDocument(doc); //
            }
        }

        aTOmWriter.close();
        nTOzWriter.close();

        searchers = new IndexSearcher[2];
        searchers[0] = new IndexSearcher(aTOmDirectory);
        searchers[1] = new IndexSearcher(nTOzDirectory);
    }

    public void testMulti() throws Exception {

        IndexSearcher searcher = new IndexSearcher(searchers);

        TermRangeQuery query = new TermRangeQuery("animal", //
                "h", //
                "t", //
                true, true);// #3

        TopDocs hits = searcher.search(query, 10);
        assertEquals("tarantula not included", 12, hits.totalHits);
    }

    /*
      #1 Create two directories
      #2 Index halves of the alphabet
      #3 Search both indexes
    */
}