Lucene example source code file (TestAnalyzingQueryParser.java)

This example Lucene source code file (TestAnalyzingQueryParser.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

asciianalyzer, cr, io, m, m, parseexception, parseexception, ren, ren, string, string, testing, to, tokenstream, zellweger

The Lucene TestAnalyzingQueryParser.java source code

package org.apache.lucene.queryParser.analyzing;

/**
 * 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.Reader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.ASCIIFoldingFilter;
import org.apache.lucene.analysis.LowerCaseFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardFilter;
import org.apache.lucene.analysis.standard.StandardTokenizer;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.Version;

/**
 * @version $Revision$, $Date$
 */
public class TestAnalyzingQueryParser extends LuceneTestCase {

  private Analyzer a;

  private String[] wildcardInput;
  private String[] wildcardExpected;
  private String[] prefixInput;
  private String[] prefixExpected;
  private String[] rangeInput;
  private String[] rangeExpected;
  private String[] fuzzyInput;
  private String[] fuzzyExpected;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    wildcardInput = new String[] { "übersetzung über*ung",
        "Mötley Cr\u00fce Mötl?* Crü?", "Renée Zellweger Ren?? Zellw?ger" };
    wildcardExpected = new String[] { "ubersetzung uber*ung", "motley crue motl?* cru?",
        "renee zellweger ren?? zellw?ger" };

    prefixInput = new String[] { "übersetzung übersetz*",
        "Mötley Crüe Mötl* crü*", "René? Zellw*" };
    prefixExpected = new String[] { "ubersetzung ubersetz*", "motley crue motl* cru*",
        "rene? zellw*" };

    rangeInput = new String[] { "[aa TO bb]", "{Anaïs TO Zoé}" };
    rangeExpected = new String[] { "[aa TO bb]", "{anais TO zoe}" };

    fuzzyInput = new String[] { "Übersetzung Übersetzung~0.9",
        "Mötley Crüe Mötley~0.75 Crüe~0.5",
        "Renée Zellweger Renée~0.9 Zellweger~" };
    fuzzyExpected = new String[] { "ubersetzung ubersetzung~0.9",
        "motley crue motley~0.75 crue~0.5", "renee zellweger renee~0.9 zellweger~0.5" };

    a = new ASCIIAnalyzer();
  }

  public void testWildCardQuery() throws ParseException {
    for (int i = 0; i < wildcardInput.length; i++) {
      assertEquals("Testing wildcards with analyzer " + a.getClass() + ", input string: "
          + wildcardInput[i], wildcardExpected[i], parseWithAnalyzingQueryParser(wildcardInput[i], a));
    }
  }

  public void testPrefixQuery() throws ParseException {
    for (int i = 0; i < prefixInput.length; i++) {
      assertEquals("Testing prefixes with analyzer " + a.getClass() + ", input string: "
          + prefixInput[i], prefixExpected[i], parseWithAnalyzingQueryParser(prefixInput[i], a));
    }
  }

  public void testRangeQuery() throws ParseException {
    for (int i = 0; i < rangeInput.length; i++) {
      assertEquals("Testing ranges with analyzer " + a.getClass() + ", input string: "
          + rangeInput[i], rangeExpected[i], parseWithAnalyzingQueryParser(rangeInput[i], a));
    }
  }

  public void testFuzzyQuery() throws ParseException {
    for (int i = 0; i < fuzzyInput.length; i++) {
      assertEquals("Testing fuzzys with analyzer " + a.getClass() + ", input string: "
          + fuzzyInput[i], fuzzyExpected[i], parseWithAnalyzingQueryParser(fuzzyInput[i], a));
    }
  }

  private String parseWithAnalyzingQueryParser(String s, Analyzer a) throws ParseException {
    AnalyzingQueryParser qp = new AnalyzingQueryParser(TEST_VERSION_CURRENT, "field", a);
    org.apache.lucene.search.Query q = qp.parse(s);
    return q.toString("field");
  }

}

final class ASCIIAnalyzer extends org.apache.lucene.analysis.Analyzer {
  public ASCIIAnalyzer() {
  }

  @Override
  public TokenStream tokenStream(String fieldName, Reader reader) {
    TokenStream result = new StandardTokenizer(LuceneTestCase.TEST_VERSION_CURRENT, reader);
    result = new StandardFilter(Version.LUCENE_31, result);
    result = new ASCIIFoldingFilter(result);
    result = new LowerCaseFilter(LuceneTestCase.TEST_VERSION_CURRENT, result);
    return result;
  }
}