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Lucene example source code file (TestStemmerOverrideFilter.java)

This example Lucene source code file (TestStemmerOverrideFilter.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

basetokenstreamtestcase, hashmap, io, ioexception, ioexception, map, porterstemfilter, porterstemfilter, stemmeroverridefilter, string, stringreader, stringreader, teststemmeroverridefilter, tokenizer, tokenstream, util

The Lucene TestStemmerOverrideFilter.java source code

package org.apache.lucene.analysis.miscellaneous;

import java.io.IOException;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;

import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.KeywordTokenizer;
import org.apache.lucene.analysis.PorterStemFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;

 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

public class TestStemmerOverrideFilter extends BaseTokenStreamTestCase {
  public void testOverride() throws IOException {
    // lets make booked stem to books
    // the override filter will convert "booked" to "books",
    // but also mark it with KeywordAttribute so Porter will not change it.
    Map<String,String> dictionary = new HashMap();
    dictionary.put("booked", "books");
    Tokenizer tokenizer = new KeywordTokenizer(new StringReader("booked"));
    TokenStream stream = new PorterStemFilter(
        new StemmerOverrideFilter(TEST_VERSION_CURRENT, tokenizer, dictionary));
    assertTokenStreamContents(stream, new String[] { "books" });

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