alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file 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.

Other links

The source code

package org.apache.lucene.index;

/**
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed 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 junit.framework.TestCase;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.document.Document;

import java.io.IOException;
import java.util.Collection;

public class TestSegmentMerger extends TestCase {
  //The variables for the new merged segment
  private Directory mergedDir = new RAMDirectory();
  private String mergedSegment = "test";
  //First segment to be merged
  private Directory merge1Dir = new RAMDirectory();
  private Document doc1 = new Document();
  private String merge1Segment = "test-1";
  private SegmentReader reader1 = null;
  //Second Segment to be merged
  private Directory merge2Dir = new RAMDirectory();
  private Document doc2 = new Document();
  private String merge2Segment = "test-2";
  private SegmentReader reader2 = null;
  

  public TestSegmentMerger(String s) {
    super(s);
  }

  protected void setUp() {
    DocHelper.setupDoc(doc1);
    DocHelper.writeDoc(merge1Dir, merge1Segment, doc1);
    DocHelper.setupDoc(doc2);
    DocHelper.writeDoc(merge2Dir, merge2Segment, doc2);
    try {
      reader1 = new SegmentReader(new SegmentInfo(merge1Segment, 1, merge1Dir));
      reader2 = new SegmentReader(new SegmentInfo(merge2Segment, 1, merge2Dir));
    } catch (IOException e) {
      e.printStackTrace();                                                      
    }

  }

  protected void tearDown() {

  }

  public void test() {
    assertTrue(mergedDir != null);
    assertTrue(merge1Dir != null);
    assertTrue(merge2Dir != null);
    assertTrue(reader1 != null);
    assertTrue(reader2 != null);
  }
  
  public void testMerge() {                             
    //System.out.println("----------------TestMerge------------------");
    SegmentMerger merger = new SegmentMerger(mergedDir, mergedSegment, false);
    merger.add(reader1);
    merger.add(reader2);
    try {
      int docsMerged = merger.merge();
      merger.closeReaders();
      assertTrue(docsMerged == 2);
      //Should be able to open a new SegmentReader against the new directory
      SegmentReader mergedReader = new SegmentReader(new SegmentInfo(mergedSegment, docsMerged, mergedDir));
      assertTrue(mergedReader != null);
      assertTrue(mergedReader.numDocs() == 2);
      Document newDoc1 = mergedReader.document(0);
      assertTrue(newDoc1 != null);
      //There are 2 unstored fields on the document
      assertTrue(DocHelper.numFields(newDoc1) == DocHelper.numFields(doc1) - 2);
      Document newDoc2 = mergedReader.document(1);
      assertTrue(newDoc2 != null);
      assertTrue(DocHelper.numFields(newDoc2) == DocHelper.numFields(doc2) - 2);
      
      TermDocs termDocs = mergedReader.termDocs(new Term(DocHelper.TEXT_FIELD_2_KEY, "field"));
      assertTrue(termDocs != null);
      assertTrue(termDocs.next() == true);
      
      Collection stored = mergedReader.getIndexedFieldNames(true);
      assertTrue(stored != null);
      //System.out.println("stored size: " + stored.size());
      assertTrue(stored.size() == 2);
      
      TermFreqVector vector = mergedReader.getTermFreqVector(0, DocHelper.TEXT_FIELD_2_KEY);
      assertTrue(vector != null);
      String [] terms = vector.getTerms();
      assertTrue(terms != null);
      //System.out.println("Terms size: " + terms.length);
      assertTrue(terms.length == 3);
      int [] freqs = vector.getTermFrequencies();
      assertTrue(freqs != null);
      //System.out.println("Freqs size: " + freqs.length);
      
      for (int i = 0; i < terms.length; i++) {
        String term = terms[i];
        int freq = freqs[i];
        //System.out.println("Term: " + term + " Freq: " + freq);
        assertTrue(DocHelper.FIELD_2_TEXT.indexOf(term) != -1);
        assertTrue(DocHelper.FIELD_2_FREQS[i] == freq);
      }                                                
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
    //System.out.println("---------------------end TestMerge-------------------");
  }    
}
... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.