package lia.meetlucene;
/**
* 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 org.apache.lucene.document.Document;
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.store.Directory;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.util.Version;
import java.io.File;
import java.io.IOException;
// From chapter 1
/**
* This code was originally written for
* Erik's Lucene intro java.net article
*/
public class Searcher {
public static void main(String[] args) throws IllegalArgumentException,
IOException, ParseException {
if (args.length != 2) {
throw new IllegalArgumentException("Usage: java " + Searcher.class.getName()
+ " <index dir> <query>");
}
String indexDir = args[0]; //1
String q = args[1]; //2
search(indexDir, q);
}
public static void search(String indexDir, String q)
throws IOException, ParseException {
Directory dir = FSDirectory.open(new File(indexDir)); //3
IndexSearcher is = new IndexSearcher(dir); //3
QueryParser parser = new QueryParser(Version.LUCENE_30, // 4
"contents", //4
new StandardAnalyzer( //4
Version.LUCENE_30)); //4
Query query = parser.parse(q); //4
long start = System.currentTimeMillis();
TopDocs hits = is.search(query, 10); //5
long end = System.currentTimeMillis();
System.err.println("Found " + hits.totalHits + //6
" document(s) (in " + (end - start) + // 6
" milliseconds) that matched query '" + // 6
q + "':"); // 6
for(ScoreDoc scoreDoc : hits.scoreDocs) {
Document doc = is.doc(scoreDoc.doc); //7
System.out.println(doc.get("fullpath")); //8
}
is.close(); //9
}
}
/*
#1 Parse provided index directory
#2 Parse provided query string
#3 Open index
#4 Parse query
#5 Search index
#6 Write search stats
#7 Retrieve matching document
#8 Display filename
#9 Close IndexSearcher
*/