SearchFilesTest.java Source code

Introduction

Here is the source code for SearchFilesTest.java

Source

/*
 * 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 java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.util.CharArraySet;
import org.apache.lucene.analysis.util.WordlistLoader;
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.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;

public class SearchFilesTest {

    private static final String codification = "UTF-8";

    private SearchFilesTest() {
    }

    /** Simple command-line based search demo. */
    public static void main(String[] args) throws Exception {
        String index = args[0];
        String field = "contents";
        String queries = "resources/query.txt";
        String queryString = null;
        int hitsPerPage = 10;

        IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index)));
        IndexSearcher searcher = new IndexSearcher(reader);
        File stopWordsFile = new File("resources/stop.txt");
        CharArraySet stopWordsCharArraySet = WordlistLoader.getWordSet(new FileReader(stopWordsFile),
                Version.LUCENE_47);
        Analyzer analyzer = new RomanianAnalyzerUsingAnotherConstructorForStopwordAnalyzer(Version.LUCENE_47,
                stopWordsCharArraySet);

        BufferedReader in = null;
        in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), codification));
        QueryParser parser = new QueryParser(Version.LUCENE_47, field, analyzer);
        while (true) {
            String line = in.readLine();
            if (line == null || line.length() == -1) {
                break;
            }
            line = line.trim();
            if (line.length() == 0) {
                break;
            }

            Query query = parser.parse(line);
            System.out.println("Looking for: " + query.toString(field));
            doPagingSearch(in, searcher, query);

            if (queryString != null) {
                break;
            }
        }
        reader.close();
    }

    public static void doPagingSearch(BufferedReader in, IndexSearcher searcher, Query query) throws IOException {

        TopDocs results = searcher.search(query, 100);
        ScoreDoc[] hits = results.scoreDocs;

        int numTotalHits = results.totalHits;
        System.out.println(numTotalHits + " total matching documents");

        for (int i = 0; i < hits.length; i++) {
            Document doc = searcher.doc(hits[i].doc);
            String path = doc.get("path");
            if (path != null) {
                System.out.println((i + 1) + ". " + path + " score = " + hits[i].score);
                String title = doc.get("title");
                if (title != null) {
                    System.out.println("   Title: " + doc.get("title"));
                }

            } else {
                System.out.println((i + 1) + ". " + "No path for this document");
            }
        }
    }
}