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Lucene example source code file (TestBulgarianAnalyzer.java)

This example Lucene source code file (TestBulgarianAnalyzer.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

analyzer, analyzer, basetokenstreamtestcase, bulgariananalyzer, bulgariananalyzer, chararrayset, collections, exception, io, ioexception, ioexception, string, string, testbulgariananalyzer, util

The Lucene TestBulgarianAnalyzer.java source code

package org.apache.lucene.analysis.bg;

/**
 * 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.io.IOException;
import java.util.Collections;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.CharArraySet;
import org.apache.lucene.util.Version;

/**
 * Test the Bulgarian analyzer
 */
public class TestBulgarianAnalyzer extends BaseTokenStreamTestCase {
  
  /**
   * This test fails with NPE when the stopwords file is missing in classpath
   */
  public void testResourcesAvailable() {
    new BulgarianAnalyzer(TEST_VERSION_CURRENT);
  }
  
  public void testStopwords() throws IOException {
    Analyzer a = new BulgarianAnalyzer(TEST_VERSION_CURRENT);
    assertAnalyzesTo(a, "Как се казваш?", new String[] {"казваш"});
  }
  
  public void testCustomStopwords() throws IOException {
    Analyzer a = new BulgarianAnalyzer(TEST_VERSION_CURRENT, Collections
        .emptySet());
    assertAnalyzesTo(a, "Как се казваш?", 
        new String[] {"как", "се", "казваш"});
  }
  
  public void testReusableTokenStream() throws IOException {
    Analyzer a = new BulgarianAnalyzer(TEST_VERSION_CURRENT);
    assertAnalyzesToReuse(a, "документи", new String[] {"документ"});
    assertAnalyzesToReuse(a, "документ", new String[] {"документ"});
  }
  
  /**
   * Test some examples from the paper
   */
  public void testBasicExamples() throws IOException {
    Analyzer a = new BulgarianAnalyzer(TEST_VERSION_CURRENT);
    assertAnalyzesTo(a, "енергийни кризи", new String[] {"енергийн", "криз"});
    assertAnalyzesTo(a, "Атомната енергия", new String[] {"атомн", "енерг"});
    
    assertAnalyzesTo(a, "компютри", new String[] {"компютр"});
    assertAnalyzesTo(a, "компютър", new String[] {"компютр"});
    
    assertAnalyzesTo(a, "градове", new String[] {"град"});
  }
  
  public void testWithStemExclusionSet() throws IOException {
    CharArraySet set = new CharArraySet(Version.LUCENE_31, 1, true);
    set.add("строеве");
    Analyzer a = new BulgarianAnalyzer(TEST_VERSION_CURRENT, CharArraySet.EMPTY_SET, set);
    assertAnalyzesTo(a, "строевете строеве", new String[] { "строй", "строеве" });
  }
  
  /** blast some random strings through the analyzer */
  public void testRandomStrings() throws Exception {
    checkRandomData(random, new BulgarianAnalyzer(TEST_VERSION_CURRENT), 10000*RANDOM_MULTIPLIER);
  }
}

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