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.RAMDirectory;

import java.io.IOException;

public class TestTermVectorsWriter extends TestCase {

  private String[] testTerms = {"this", "is", "a", "test"};
  private String [] testFields = {"f1", "f2", "f3"};
  private int[][] positions = new int[testTerms.length][];
  private RAMDirectory dir = new RAMDirectory();
  private String seg = "testSegment";
  private FieldInfos fieldInfos = new FieldInfos();

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

  protected void setUp() {

    for (int i = 0; i < testFields.length; i++) {
      fieldInfos.add(testFields[i], true, true);
    }
    

    for (int i = 0; i < testTerms.length; i++) {
      positions[i] = new int[5];
      for (int j = 0; j < positions[i].length; j++) {
        positions[i][j] = i * 100;
      }
    }
  }

  protected void tearDown() {
  }

  public void test() {
    assertTrue(dir != null);
    assertTrue(positions != null);
  }
  
  /*public void testWriteNoPositions() {
    try {
      TermVectorsWriter writer = new TermVectorsWriter(dir, seg, 50);
      writer.openDocument();
      assertTrue(writer.isDocumentOpen() == true);
      writer.openField(0);
      assertTrue(writer.isFieldOpen() == true);
      for (int i = 0; i < testTerms.length; i++) {
        writer.addTerm(testTerms[i], i);
      }
      writer.closeField();
      
      writer.closeDocument();
      writer.close();
      assertTrue(writer.isDocumentOpen() == false);
      //Check to see the files were created
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVD_EXTENSION));
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVX_EXTENSION));
      //Now read it back in
      TermVectorsReader reader = new TermVectorsReader(dir, seg);
      assertTrue(reader != null);
      checkTermVector(reader, 0, 0);
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
  }  */  

  public void testWriter() {
    try {
      TermVectorsWriter writer = new TermVectorsWriter(dir, seg, fieldInfos);
      writer.openDocument();
      assertTrue(writer.isDocumentOpen() == true);
      writeField(writer, testFields[0]);
      writer.closeDocument();
      writer.close();
      assertTrue(writer.isDocumentOpen() == false);
      //Check to see the files were created
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVD_EXTENSION));
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVX_EXTENSION));
      //Now read it back in
      TermVectorsReader reader = new TermVectorsReader(dir, seg, fieldInfos);
      assertTrue(reader != null);
      checkTermVector(reader, 0, testFields[0]);
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
  }
  private void checkTermVector(TermVectorsReader reader, int docNum, String field) throws IOException {
    TermFreqVector vector = reader.get(docNum, field);
    assertTrue(vector != null);
    String[] terms = vector.getTerms();
    assertTrue(terms != null);
    assertTrue(terms.length == testTerms.length);
    for (int i = 0; i < terms.length; i++) {
      String term = terms[i];
      assertTrue(term.equals(testTerms[i]));
    }
  }

  /**
   * Test one document, multiple fields
   */
  public void testMultipleFields() {
    try {
      TermVectorsWriter writer = new TermVectorsWriter(dir, seg, fieldInfos);
      writeDocument(writer, testFields.length);

      writer.close();

      assertTrue(writer.isDocumentOpen() == false);
      //Check to see the files were created
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVD_EXTENSION));
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVX_EXTENSION));
      //Now read it back in
      TermVectorsReader reader = new TermVectorsReader(dir, seg, fieldInfos);
      assertTrue(reader != null);

      for (int j = 0; j < testFields.length; j++) {
        checkTermVector(reader, 0, testFields[j]);
      }
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
  }

  private void writeDocument(TermVectorsWriter writer, int numFields) throws IOException {
    writer.openDocument();
    assertTrue(writer.isDocumentOpen() == true);

    for (int j = 0; j < numFields; j++) {
      writeField(writer, testFields[j]);
    }
    writer.closeDocument();
    assertTrue(writer.isDocumentOpen() == false);
  }

  /**
   * 
   * @param writer The writer to write to
   * @param j The field number
   * @throws IOException
   */
  private void writeField(TermVectorsWriter writer, String f) throws IOException {
    writer.openField(f);
    assertTrue(writer.isFieldOpen() == true);
    for (int i = 0; i < testTerms.length; i++) {
      writer.addTerm(testTerms[i], i);
    }
    writer.closeField();
  }


  public void testMultipleDocuments() {

    try {
      TermVectorsWriter writer = new TermVectorsWriter(dir, seg, fieldInfos);
      assertTrue(writer != null);
      for (int i = 0; i < 10; i++) {
        writeDocument(writer, testFields.length);
      }
      writer.close();
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }      
    //Do some arbitrary tests
    try {
      TermVectorsReader reader = new TermVectorsReader(dir, seg, fieldInfos);
      for (int i = 0; i < 10; i++) {        
        assertTrue(reader != null);
        checkTermVector(reader, 5, testFields[0]);
        checkTermVector(reader, 2, testFields[2]);
      }
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
  }

}
... 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.