lucene.Access.java Source code

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Here is the source code for lucene.Access.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 lucene;

import java.io.File;

import lridx.Builder;
import org.apache.jena.atlas.lib.FileOps;
import org.apache.jena.atlas.logging.LogCtl;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.core.KeywordAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Access {
    static Logger log = LoggerFactory.getLogger(Access.class);
    static {
        LogCtl.setCmdLogging();
    }

    public static void main(String... argv) throws Exception {
        if (Builder.INDEX == null) {
            log.error("Null index");
            System.exit(1);
        }

        if (!FileOps.exists(Builder.INDEX)) {
            log.error("No index");
            System.exit(1);
        }

        if (argv.length != 1) {
            log.error("Usage : \"lucene_query\"");
            System.exit(2);
        }

        String queryString = argv[0];

        try (Directory dir = FSDirectory.open(new File(Builder.INDEX))) {
            read(dir, queryString);
        }
    }

    public static void read(Directory dir, String qs) throws Exception {
        Analyzer analyzer = new KeywordAnalyzer();
        IndexReader indexReader = DirectoryReader.open(dir);
        IndexSearcher indexSearcher = new IndexSearcher(indexReader);

        QueryParser queryParser = new QueryParser(Version.LUCENE_46, "uri", analyzer);
        queryParser.setAllowLeadingWildcard(true);
        org.apache.lucene.search.Query query = queryParser.parse(qs);

        // There are 19M transaction records.
        int limit = 50 * 1000 * 1000;
        if (limit <= 0)
            limit = 100000;
        ScoreDoc[] sDocs = indexSearcher.search(query, limit).scoreDocs;
        //        if ( sDocs.length == 0 )
        //            log.info("No hits"); 
        for (ScoreDoc sd : sDocs) {
            Document doc2 = indexSearcher.doc(sd.doc);
            //String[] values = doc2.getValues("uri") ;
            log.info(doc2.get("uri") + "  " + doc2.get("transactionDate") + "  " + doc2.get("pricePaid"));
        }
    }

}