Lucene example source code file (CountingHighlighterTestTask.java)

This example Lucene source code file (CountingHighlighterTestTask.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

benchmarkhighlighter, countinghighlightertesttask, countinghighlightertesttask, document, document, exception, io, ioexception, override, override, queryscorer, searchtravrethighlighttask, string, string, textfragment

The Lucene CountingHighlighterTestTask.java source code

/**
 * 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.
 */

package org.apache.lucene.benchmark.byTask.tasks;

import org.apache.lucene.benchmark.byTask.PerfRunData;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.TextFragment;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.TokenSources;
import org.apache.lucene.search.Query;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexReader;

import java.io.IOException;

/**
 * Test Search task which counts number of searches.
 */
public class CountingHighlighterTestTask extends SearchTravRetHighlightTask {

  public static int numHighlightedResults = 0;
  public static int numDocsRetrieved = 0;

  public CountingHighlighterTestTask(PerfRunData runData) {
    super(runData);
  }

  @Override
  protected Document retrieveDoc(IndexReader ir, int id) throws IOException {
    Document document = ir.document(id);
    if (document != null) {
      numDocsRetrieved++;
    }
    return document;
  }

  @Override
  public BenchmarkHighlighter getBenchmarkHighlighter(Query q) {
    highlighter = new Highlighter(new SimpleHTMLFormatter(), new QueryScorer(q));
    return new BenchmarkHighlighter() {
      @Override
      public int doHighlight(IndexReader reader, int doc, String field, Document document, Analyzer analyzer, String text) throws Exception {
        TokenStream ts = TokenSources.getAnyTokenStream(reader, doc, field, document, analyzer);
        TextFragment[] frag = highlighter.getBestTextFragments(ts, text, mergeContiguous, maxFrags);
        numHighlightedResults += frag != null ? frag.length : 0;
        return frag != null ? frag.length : 0;
      }
    };
  }
}