mm.SearchFiles.java Source code

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Here is the source code for mm.SearchFiles.java

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package mm;

/*
 * 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.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Date;
import java.util.List;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
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;

/** Simple command-line based search demo. */
public class SearchFiles {

    private static String index = "C:\\Users\\mnorhamizan\\Documents\\index";
    private static String field = "contents";
    private static String queries = null;
    private static int repeat = 0;
    private static boolean raw = false;

    public SearchFiles(String[] args) {
        String usage = "Usage:\tjava org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-query string] [-raw] [-paging hitsPerPage]\n\nSee http://lucene.apache.org/core/4_1_0/demo/ for details.";
        if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) {
            System.out.println(usage);
            System.exit(0);
        }
        // regular search
        //       String queryString = "computer";

        //wildcard query
        //       String queryString = "te*t";

        //fuzzy query
        //       String queryString = "roam~2";

        //phrase query 
        //       String queryString = "\"apache lucene\"~5";

        //boolean search
        //       String queryString = "\"networks\" AND \"protocol\"";

        //boosted search
    }

    public static int searchQuery(String q) throws Exception {
        List<String> result = null;
        int hits = 0;
        String queryString = q;

        int hitsPerPage = 100;
        IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(index)));
        IndexSearcher searcher = new IndexSearcher(reader);
        Analyzer analyzer = new StandardAnalyzer();

        BufferedReader in = null;
        QueryParser parser = new QueryParser(field, analyzer);

        Query query = parser.parse(queryString);

        System.out.println("Searching for: " + query.toString(field));
        searcher.search(query, 100);
        hits = doSearch(in, searcher, query, hitsPerPage, raw, queries == null && queryString == null);
        reader.close();

        return hits;
    }

    /** Simple command-line based search demo. */

    /**
     * This demonstrates a typical paging search scenario, where the search engine presents 
     * pages of size n to the user. The user can then go to the next page if interested in
     * the next hits.
     * 
     * When the query is executed for the first time, then only enough results are collected
     * to fill 5 result pages. If the user wants to page beyond this limit, then the query
     * is executed another time and all hits are collected.
     * 
     */
    public static int doSearch(BufferedReader in, IndexSearcher searcher, Query query, int hitsPerPage, boolean raw,
            boolean interactive) throws IOException {

        // Collect enough docs to show 5 pages
        TopDocs results = searcher.search(query, 5 * hitsPerPage);
        ScoreDoc[] hits = results.scoreDocs;

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

        int start = 0;
        int end = Math.min(numTotalHits, hitsPerPage);

        for (int i = start; i < end; i++) {
            Document doc = searcher.doc(hits[i].doc);
            String path = doc.get("path");
            if (path != null) {
                System.out.println((i + 1) + ". " + path);
                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");
            }

        }
        return numTotalHits;
    }
}