org.apache.lucene.benchmark.quality.utils.SimpleQQParser.java Source code

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Here is the source code for org.apache.lucene.benchmark.quality.utils.SimpleQQParser.java

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/*
 * 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.quality.utils;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.benchmark.quality.QualityQuery;
import org.apache.lucene.benchmark.quality.QualityQueryParser;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.queryparser.classic.QueryParserBase;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;

/**
 * Simplistic quality query parser. A Lucene query is created by passing 
 * the value of the specified QualityQuery name-value pair(s) into 
 * a Lucene's QueryParser using StandardAnalyzer. */
public class SimpleQQParser implements QualityQueryParser {

    private String qqNames[];
    private String indexField;
    ThreadLocal<QueryParser> queryParser = new ThreadLocal<>();

    /**
     * Constructor of a simple qq parser.
     * @param qqNames name-value pairs of quality query to use for creating the query
     * @param indexField corresponding index field  
     */
    public SimpleQQParser(String qqNames[], String indexField) {
        this.qqNames = qqNames;
        this.indexField = indexField;
    }

    /**
     * Constructor of a simple qq parser.
     * @param qqName name-value pair of quality query to use for creating the query
     * @param indexField corresponding index field  
     */
    public SimpleQQParser(String qqName, String indexField) {
        this(new String[] { qqName }, indexField);
    }

    /* (non-Javadoc)
     * @see org.apache.lucene.benchmark.quality.QualityQueryParser#parse(org.apache.lucene.benchmark.quality.QualityQuery)
     */
    @Override
    public Query parse(QualityQuery qq) throws ParseException {
        QueryParser qp = queryParser.get();
        if (qp == null) {
            qp = new QueryParser(indexField, new StandardAnalyzer());
            queryParser.set(qp);
        }
        BooleanQuery.Builder bq = new BooleanQuery.Builder();
        for (int i = 0; i < qqNames.length; i++)
            bq.add(qp.parse(QueryParserBase.escape(qq.getValue(qqNames[i]))), BooleanClause.Occur.SHOULD);

        return bq.build();
    }

}