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Lucene example source code file (TestBinaryDocument.java)

This example Lucene source code file (TestBinaryDocument.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, field, field, fieldable, illegalargumentexception, indexreader, randomindexwriter, randomindexwriter, string, string, testbinarydocument

The Lucene TestBinaryDocument.java source code

package org.apache.lucene.document;

import org.apache.lucene.util.LuceneTestCase;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.store.Directory;

/**
 * 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.
 */

/**
 * Tests {@link Document} class.
 */
public class TestBinaryDocument extends LuceneTestCase {

  String binaryValStored = "this text will be stored as a byte array in the index";
  String binaryValCompressed = "this text will be also stored and compressed as a byte array in the index";
  
  public void testBinaryFieldInIndex()
    throws Exception
  {
    Fieldable binaryFldStored = new Field("binaryStored", binaryValStored.getBytes());
    Fieldable stringFldStored = new Field("stringStored", binaryValStored, Field.Store.YES, Field.Index.NO, Field.TermVector.NO);

    try {
      // binary fields with store off are not allowed
      new Field("fail", binaryValStored.getBytes(), Field.Store.NO);
      fail();
    }
    catch (IllegalArgumentException iae) {
    }
    
    Document doc = new Document();
    
    doc.add(binaryFldStored);
    
    doc.add(stringFldStored);

    /** test for field count */
    assertEquals(2, doc.fields.size());
    
    /** add the doc to a ram index */
    Directory dir = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random, dir);
    writer.addDocument(doc);
    
    /** open a reader and fetch the document */ 
    IndexReader reader = writer.getReader();
    Document docFromReader = reader.document(0);
    assertTrue(docFromReader != null);
    
    /** fetch the binary stored field and compare it's content with the original one */
    String binaryFldStoredTest = new String(docFromReader.getBinaryValue("binaryStored"));
    assertTrue(binaryFldStoredTest.equals(binaryValStored));
    
    /** fetch the string field and compare it's content with the original one */
    String stringFldStoredTest = docFromReader.get("stringStored");
    assertTrue(stringFldStoredTest.equals(binaryValStored));
    
    writer.close();    
    reader.close();
    
    reader = IndexReader.open(dir, false);
    /** delete the document from index */
    reader.deleteDocument(0);
    assertEquals(0, reader.numDocs());
    
    reader.close();
    dir.close();
  }
  
  public void testCompressionTools() throws Exception {
    Fieldable binaryFldCompressed = new Field("binaryCompressed", CompressionTools.compress(binaryValCompressed.getBytes()));
    Fieldable stringFldCompressed = new Field("stringCompressed", CompressionTools.compressString(binaryValCompressed));
    
    Document doc = new Document();
    
    doc.add(binaryFldCompressed);
    doc.add(stringFldCompressed);
    
    /** add the doc to a ram index */
    Directory dir = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random, dir);
    writer.addDocument(doc);
    
    /** open a reader and fetch the document */ 
    IndexReader reader = writer.getReader();
    Document docFromReader = reader.document(0);
    assertTrue(docFromReader != null);
    
    /** fetch the binary compressed field and compare it's content with the original one */
    String binaryFldCompressedTest = new String(CompressionTools.decompress(docFromReader.getBinaryValue("binaryCompressed")));
    assertTrue(binaryFldCompressedTest.equals(binaryValCompressed));
    assertTrue(CompressionTools.decompressString(docFromReader.getBinaryValue("stringCompressed")).equals(binaryValCompressed));

    writer.close();
    reader.close();
    dir.close();
  }
}

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