Lucene example source code file (SimpleQueryMaker.java)

This example Lucene source code file (SimpleQueryMaker.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

abstractquerymaker, analyzer, arraylist, arraylist, booleanquery, booleanquery, exception, override, query, query, queryparser, simplequerymaker, termquery, termquery, util

The Lucene SimpleQueryMaker.java source code

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

/**
 * 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 org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.benchmark.byTask.tasks.NewAnalyzerTask;
import org.apache.lucene.util.Version;

import java.util.ArrayList;

/**
 * A QueryMaker that makes queries for a collection created 
 * using {@link org.apache.lucene.benchmark.byTask.feeds.SingleDocSource}.
 */
public class SimpleQueryMaker extends AbstractQueryMaker implements QueryMaker {


  /**
   * Prepare the queries for this test.
   * Extending classes can override this method for preparing different queries. 
   * @return prepared queries.
   * @throws Exception if cannot prepare the queries.
   */
  @Override
  protected Query[] prepareQueries() throws Exception {
    // analyzer (default is standard analyzer)
    Analyzer anlzr= NewAnalyzerTask.createAnalyzer(config.get("analyzer",
        "org.apache.lucene.analysis.standard.StandardAnalyzer")); 
    
    QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, DocMaker.BODY_FIELD,anlzr);
    ArrayList<Query> qq = new ArrayList();
    Query q1 = new TermQuery(new Term(DocMaker.ID_FIELD,"doc2"));
    qq.add(q1);
    Query q2 = new TermQuery(new Term(DocMaker.BODY_FIELD,"simple"));
    qq.add(q2);
    BooleanQuery bq = new BooleanQuery();
    bq.add(q1,Occur.MUST);
    bq.add(q2,Occur.MUST);
    qq.add(bq);
    qq.add(qp.parse("synthetic body"));
    qq.add(qp.parse("\"synthetic body\""));
    qq.add(qp.parse("synthetic text"));
    qq.add(qp.parse("\"synthetic text\""));
    qq.add(qp.parse("\"synthetic text\"~3"));
    qq.add(qp.parse("zoom*"));
    qq.add(qp.parse("synth*"));
    return  qq.toArray(new Query[0]);
  }

}