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Lucene example source code file (TestCollationKeyAnalyzer.java)

This example Lucene source code file (TestCollationKeyAnalyzer.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, bfjdh, bfjhd, bjdhf, collationkeyanalyzer, collator, exception, exception, locale, locale, string, string, text, u, util

The Lucene TestCollationKeyAnalyzer.java source code

package org.apache.lucene.collation;

/**
 * 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 org.apache.lucene.analysis.Analyzer;

import java.text.Collator;
import java.util.Locale;


public class TestCollationKeyAnalyzer extends CollationTestBase {
  // the sort order of Ø versus U depends on the version of the rules being used
  // for the inherited root locale: Ø's order isnt specified in Locale.US since 
  // its not used in english.
  private boolean oStrokeFirst = Collator.getInstance(new Locale("")).compare("Ø", "U") < 0;
  
  // Neither Java 1.4.2 nor 1.5.0 has Farsi Locale collation available in
  // RuleBasedCollator.  However, the Arabic Locale seems to order the Farsi
  // characters properly.
  private Collator collator = Collator.getInstance(new Locale("ar"));
  private Analyzer analyzer = new CollationKeyAnalyzer(collator);

  private String firstRangeBeginning = encodeCollationKey
    (collator.getCollationKey(firstRangeBeginningOriginal).toByteArray());
  private String firstRangeEnd = encodeCollationKey
    (collator.getCollationKey(firstRangeEndOriginal).toByteArray());
  private String secondRangeBeginning = encodeCollationKey
    (collator.getCollationKey(secondRangeBeginningOriginal).toByteArray());
  private String secondRangeEnd = encodeCollationKey
    (collator.getCollationKey(secondRangeEndOriginal).toByteArray());
  
  public void testFarsiRangeFilterCollating() throws Exception {
    testFarsiRangeFilterCollating
      (analyzer, firstRangeBeginning, firstRangeEnd, 
       secondRangeBeginning, secondRangeEnd);
  }
 
  public void testFarsiRangeQueryCollating() throws Exception {
    testFarsiRangeQueryCollating
      (analyzer, firstRangeBeginning, firstRangeEnd, 
       secondRangeBeginning, secondRangeEnd);
  }

  public void testFarsiTermRangeQuery() throws Exception {
    testFarsiTermRangeQuery
      (analyzer, firstRangeBeginning, firstRangeEnd, 
       secondRangeBeginning, secondRangeEnd);
  }
  
  public void testCollationKeySort() throws Exception {
    Analyzer usAnalyzer 
      = new CollationKeyAnalyzer(Collator.getInstance(Locale.US));
    Analyzer franceAnalyzer 
      = new CollationKeyAnalyzer(Collator.getInstance(Locale.FRANCE));
    Analyzer swedenAnalyzer 
      = new CollationKeyAnalyzer(Collator.getInstance(new Locale("sv", "se")));
    Analyzer denmarkAnalyzer 
      = new CollationKeyAnalyzer(Collator.getInstance(new Locale("da", "dk")));
    
    // The ICU Collator and Sun java.text.Collator implementations differ in their
    // orderings - "BFJDH" is the ordering for java.text.Collator for Locale.US.
    testCollationKeySort
    (usAnalyzer, franceAnalyzer, swedenAnalyzer, denmarkAnalyzer, 
     oStrokeFirst ? "BFJHD" : "BFJDH", "EACGI", "BJDFH", "BJDHF");
  }
  
  public void testThreadSafe() throws Exception {
    int iters = 20 * RANDOM_MULTIPLIER;
    for (int i = 0; i < iters; i++) {
      Collator collator = Collator.getInstance(Locale.GERMAN);
      collator.setStrength(Collator.PRIMARY);
      assertThreadSafe(new CollationKeyAnalyzer(collator));
    }
  }
}

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