com.leavesfly.lia.extsearch.queryparser.NumericQueryParserTest.java Source code

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Here is the source code for com.leavesfly.lia.extsearch.queryparser.NumericQueryParserTest.java

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package com.leavesfly.lia.extsearch.queryparser;

/**
 * Copyright Manning Publications Co.
 *
 * 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 lan      
 */

import junit.framework.TestCase;

import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.Query;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.document.DateTools;
import org.apache.lucene.util.Version;

import com.leavesfly.lia.commom.TestUtil;

import java.util.Locale;

// From chapter 6
public class NumericQueryParserTest extends TestCase {
    private Analyzer analyzer;
    private IndexSearcher searcher;
    private Directory dir;

    protected void setUp() throws Exception {
        analyzer = new WhitespaceAnalyzer();
        dir = TestUtil.getBookIndexDirectory();
        searcher = new IndexSearcher(dir, true);
    }

    protected void tearDown() throws Exception {
        searcher.close();
        dir.close();
    }

    static class NumericRangeQueryParser extends QueryParser {
        public NumericRangeQueryParser(Version matchVersion, String field, Analyzer a) {
            super(matchVersion, field, a);
        }

        public Query getRangeQuery(String field, String part1, String part2, boolean inclusive)
                throws ParseException {
            TermRangeQuery query = (TermRangeQuery) // A
            super.getRangeQuery(field, part1, part2, // A
                    inclusive); // A
            if ("price".equals(field)) {
                return NumericRangeQuery.newDoubleRange( // B
                        "price", // B
                        Double.parseDouble( // B
                                query.getLowerTerm()), // B
                        Double.parseDouble( // B
                                query.getUpperTerm()), // B
                        query.includesLower(), // B
                        query.includesUpper()); // B
            } else {
                return query; // C
            }
        }
    }

    /*
     * #A Get super()'s default TermRangeQuery #B Create matching
     * NumericRangeQuery #C Return default TermRangeQuery
     */

    public void testNumericRangeQuery() throws Exception {
        String expression = "price:[10 TO 20]";

        QueryParser parser = new NumericRangeQueryParser(Version.LUCENE_30, "subject", analyzer);

        Query query = parser.parse(expression);
        System.out.println(expression + " parsed to " + query);
    }

    public static class NumericDateRangeQueryParser extends QueryParser {
        public NumericDateRangeQueryParser(Version matchVersion, String field, Analyzer a) {
            super(matchVersion, field, a);
        }

        public Query getRangeQuery(String field, String part1, String part2, boolean inclusive)
                throws ParseException {
            TermRangeQuery query = (TermRangeQuery) super.getRangeQuery(field, part1, part2, inclusive);

            if ("pubmonth".equals(field)) {
                return NumericRangeQuery.newIntRange("pubmonth", Integer.parseInt(query.getLowerTerm()),
                        Integer.parseInt(query.getUpperTerm()), query.includesLower(), query.includesUpper());
            } else {
                return query;
            }
        }
    }

    public void testDefaultDateRangeQuery() throws Exception {
        QueryParser parser = new QueryParser(Version.LUCENE_30, "subject", analyzer);
        Query query = parser.parse("pubmonth:[1/1/04 TO 12/31/04]");
        System.out.println("default date parsing: " + query);
    }

    public void testDateRangeQuery() throws Exception {
        String expression = "pubmonth:[01/01/2010 TO 06/01/2010]";

        QueryParser parser = new NumericDateRangeQueryParser(Version.LUCENE_30, "subject", analyzer);

        parser.setDateResolution("pubmonth", DateTools.Resolution.MONTH); // 1
        parser.setLocale(Locale.US);

        Query query = parser.parse(expression);
        System.out.println(expression + " parsed to " + query);

        TopDocs matches = searcher.search(query, 10);
        assertTrue("expecting at least one result !", matches.totalHits > 0);
    }
    /*
     * 1 Tell QueryParser date resolution
     */
}