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Lucene example source code file (OffsetLimitTokenFilterTest.java)

This example Lucene source code file (OffsetLimitTokenFilterTest.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, exception, io, mocktokenizer, mocktokenizer, offsetlimittokenfilter, offsetlimittokenfilter, offsetlimittokenfiltertest, override, reader, string, string, stringreader, stringreader, tokenstream

The Lucene OffsetLimitTokenFilterTest.java source code

package org.apache.lucene.search.highlight;

/**
 * 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 java.io.StringReader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.MockTokenizer;
import org.apache.lucene.analysis.WhitespaceAnalyzer;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.util.Version;

public class OffsetLimitTokenFilterTest extends BaseTokenStreamTestCase {
  
  public void testFilter() throws Exception {
    // we disable MockTokenizer checks because we will forcefully limit the 
    // tokenstream and call end() before incrementToken() returns false.
    MockTokenizer stream = new MockTokenizer(new StringReader(
        "short toolong evenmuchlongertext a ab toolong foo"),
        MockTokenizer.WHITESPACE, false);
    stream.setEnableChecks(false);
    OffsetLimitTokenFilter filter = new OffsetLimitTokenFilter(stream, 10);
    assertTokenStreamContents(filter, new String[] {"short", "toolong"});
    
    stream = new MockTokenizer(new StringReader(
    "short toolong evenmuchlongertext a ab toolong foo"),
    MockTokenizer.WHITESPACE, false);
    stream.setEnableChecks(false);
    filter = new OffsetLimitTokenFilter(stream, 12);
    assertTokenStreamContents(filter, new String[] {"short", "toolong"});
  
    stream = new MockTokenizer(new StringReader(
    "short toolong evenmuchlongertext a ab toolong foo"),
    MockTokenizer.WHITESPACE, false);
    stream.setEnableChecks(false);
    filter = new OffsetLimitTokenFilter(stream, 30);
    assertTokenStreamContents(filter, new String[] {"short", "toolong",
        "evenmuchlongertext"});
    
    // TODO: This is not actually testing reuse! (reusableTokenStream is not implemented)
    checkOneTermReuse(new Analyzer() {
      
      @Override
      public TokenStream tokenStream(String fieldName, Reader reader) {
        MockTokenizer tokenizer = new MockTokenizer(reader, MockTokenizer.WHITESPACE, false);
        tokenizer.setEnableChecks(false);
        return new OffsetLimitTokenFilter(tokenizer, 10);
      }
    }, "llenges", "llenges");
  }
}

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