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Lucene example source code file (TypeAsPayloadTokenFilterTest.java)

This example Lucene source code file (TypeAsPayloadTokenFilterTest.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

chartermattribute, io, ioexception, ioexception, mocktokenizer, override, string, string, tokenfilter, typeaspayloadtokenfilter, typeattribute, typeattribute, utf-8, wordtokenfilter, wordtokenfilter

The Lucene TypeAsPayloadTokenFilterTest.java source code

package org.apache.lucene.analysis.payloads;

/**
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed 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.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.MockTokenizer;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.PayloadAttribute;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.TypeAttribute;

import java.io.IOException;
import java.io.StringReader;

public class TypeAsPayloadTokenFilterTest extends BaseTokenStreamTestCase {

  public void test() throws IOException {
    String test = "The quick red fox jumped over the lazy brown dogs";

    TypeAsPayloadTokenFilter nptf = new TypeAsPayloadTokenFilter(new WordTokenFilter(new MockTokenizer(new StringReader(test), MockTokenizer.WHITESPACE, false)));
    int count = 0;
    CharTermAttribute termAtt = nptf.getAttribute(CharTermAttribute.class);
    TypeAttribute typeAtt = nptf.getAttribute(TypeAttribute.class);
    PayloadAttribute payloadAtt = nptf.getAttribute(PayloadAttribute.class);
    nptf.reset();
    while (nptf.incrementToken()) {
      assertTrue(typeAtt.type() + " is not null and it should be", typeAtt.type().equals(String.valueOf(Character.toUpperCase(termAtt.buffer()[0]))));
      assertTrue("nextToken.getPayload() is null and it shouldn't be", payloadAtt.getPayload() != null);
      String type = new String(payloadAtt.getPayload().getData(), "UTF-8");
      assertTrue(type + " is not equal to " + typeAtt.type(), type.equals(typeAtt.type()) == true);
      count++;
    }

    assertTrue(count + " does not equal: " + 10, count == 10);
  }

  private final class WordTokenFilter extends TokenFilter {
    private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
    private final TypeAttribute typeAtt = addAttribute(TypeAttribute.class);
    
    private WordTokenFilter(TokenStream input) {
      super(input);
    }

    @Override
    public boolean incrementToken() throws IOException {
      if (input.incrementToken()) {
        typeAtt.setType(String.valueOf(Character.toUpperCase(termAtt.buffer()[0])));
        return true;
      } else {
        return false;
      }
    }
  }

}

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