lucene/demo/src/java/org/apache/lucene/demo/SearchFiles.java - lucene-solr - Git at Google

 /*
  * 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 org.apache.lucene.demo;


 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 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 SearchFiles() {}

   /** Simple command-line based search demo. */
   public static void main(String[] args) throws Exception {
     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);
     }

     String index = "index";
     String field = "contents";
     String queries = null;
     int repeat = 0;
     boolean raw = false;
     String queryString = null;
     int hitsPerPage = 10;

     for(int i = 0;i < args.length;i++) {
       if ("-index".equals(args[i])) {
         index = args[i+1];
         i++;
       } else if ("-field".equals(args[i])) {
         field = args[i+1];
         i++;
       } else if ("-queries".equals(args[i])) {
         queries = args[i+1];
         i++;
       } else if ("-query".equals(args[i])) {
         queryString = args[i+1];
         i++;
       } else if ("-repeat".equals(args[i])) {
         repeat = Integer.parseInt(args[i+1]);
         i++;
       } else if ("-raw".equals(args[i])) {
         raw = true;
       } else if ("-paging".equals(args[i])) {
         hitsPerPage = Integer.parseInt(args[i+1]);
         if (hitsPerPage <= 0) {
           System.err.println("There must be at least 1 hit per page.");
           System.exit(1);
         }
         i++;
       }
     }

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

     BufferedReader in = null;
     if (queries != null) {
       in = Files.newBufferedReader(Paths.get(queries), StandardCharsets.UTF_8);
     } else {
       in = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
     }
     QueryParser parser = new QueryParser(field, analyzer);
     while (true) {
       if (queries == null && queryString == null) {                        // prompt the user
         System.out.println("Enter query: ");
       }

       String line = queryString != null ? queryString : 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("Searching for: " + query.toString(field));

       if (repeat > 0) {                           // repeat & time as benchmark
         Date start = new Date();
         for (int i = 0; i < repeat; i++) {
           searcher.search(query, 100);
         }
         Date end = new Date();
         System.out.println("Time: "+(end.getTime()-start.getTime())+"ms");
       }

       doPagingSearch(in, searcher, query, hitsPerPage, raw, queries == null && queryString == null);

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

   /**
    * 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 void doPagingSearch(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 = Math.toIntExact(results.totalHits.value);
     System.out.println(numTotalHits + " total matching documents");

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

     while (true) {
       if (end > hits.length) {
         System.out.println("Only results 1 - " + hits.length +" of " + numTotalHits + " total matching documents collected.");
         System.out.println("Collect more (y/n) ?");
         String line = in.readLine();
         if (line.length() == 0 || line.charAt(0) == 'n') {
           break;
         }

         hits = searcher.search(query, numTotalHits).scoreDocs;
       }

       end = Math.min(hits.length, start + hitsPerPage);

       for (int i = start; i < end; i++) {
         if (raw) {                              // output raw format
           System.out.println("doc="+hits[i].doc+" score="+hits[i].score);
           continue;
         }

         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");
         }

       }

       if (!interactive || end == 0) {
         break;
       }

       if (numTotalHits >= end) {
         boolean quit = false;
         while (true) {
           System.out.print("Press ");
           if (start - hitsPerPage >= 0) {
             System.out.print("(p)revious page, ");
           }
           if (start + hitsPerPage < numTotalHits) {
             System.out.print("(n)ext page, ");
           }
           System.out.println("(q)uit or enter number to jump to a page.");

           String line = in.readLine();
           if (line.length() == 0 || line.charAt(0)=='q') {
             quit = true;
             break;
           }
           if (line.charAt(0) == 'p') {
             start = Math.max(0, start - hitsPerPage);
             break;
           } else if (line.charAt(0) == 'n') {
             if (start + hitsPerPage < numTotalHits) {
               start+=hitsPerPage;
             }
             break;
           } else {
             int page = Integer.parseInt(line);
             if ((page - 1) * hitsPerPage < numTotalHits) {
               start = (page - 1) * hitsPerPage;
               break;
             } else {
               System.out.println("No such page");
             }
           }
         }
         if (quit) break;
         end = Math.min(numTotalHits, start + hitsPerPage);
       }
     }
   }
 }
	/*
	* 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 org.apache.lucene.demo;


	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 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 SearchFiles() {}

	/** Simple command-line based search demo. */
	public static void main(String[] args) throws Exception {
	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);
	}

	String index = "index";
	String field = "contents";
	String queries = null;
	int repeat = 0;
	boolean raw = false;
	String queryString = null;
	int hitsPerPage = 10;

	for(int i = 0;i < args.length;i++) {
	if ("-index".equals(args[i])) {
	index = args[i+1];
	i++;
	} else if ("-field".equals(args[i])) {
	field = args[i+1];
	i++;
	} else if ("-queries".equals(args[i])) {
	queries = args[i+1];
	i++;
	} else if ("-query".equals(args[i])) {
	queryString = args[i+1];
	i++;
	} else if ("-repeat".equals(args[i])) {
	repeat = Integer.parseInt(args[i+1]);
	i++;
	} else if ("-raw".equals(args[i])) {
	raw = true;
	} else if ("-paging".equals(args[i])) {
	hitsPerPage = Integer.parseInt(args[i+1]);
	if (hitsPerPage <= 0) {
	System.err.println("There must be at least 1 hit per page.");
	System.exit(1);
	}
	i++;
	}
	}

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

	BufferedReader in = null;
	if (queries != null) {
	in = Files.newBufferedReader(Paths.get(queries), StandardCharsets.UTF_8);
	} else {
	in = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
	}
	QueryParser parser = new QueryParser(field, analyzer);
	while (true) {
	if (queries == null && queryString == null) { // prompt the user
	System.out.println("Enter query: ");
	}

	String line = queryString != null ? queryString : 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("Searching for: " + query.toString(field));

	if (repeat > 0) { // repeat & time as benchmark
	Date start = new Date();
	for (int i = 0; i < repeat; i++) {
	searcher.search(query, 100);
	}
	Date end = new Date();
	System.out.println("Time: "+(end.getTime()-start.getTime())+"ms");
	}

	doPagingSearch(in, searcher, query, hitsPerPage, raw, queries == null && queryString == null);

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

	/**
	* 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 void doPagingSearch(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 = Math.toIntExact(results.totalHits.value);
	System.out.println(numTotalHits + " total matching documents");

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

	while (true) {
	if (end > hits.length) {
	System.out.println("Only results 1 - " + hits.length +" of " + numTotalHits + " total matching documents collected.");
	System.out.println("Collect more (y/n) ?");
	String line = in.readLine();
	if (line.length() == 0 \|\| line.charAt(0) == 'n') {
	break;
	}

	hits = searcher.search(query, numTotalHits).scoreDocs;
	}

	end = Math.min(hits.length, start + hitsPerPage);

	for (int i = start; i < end; i++) {
	if (raw) { // output raw format
	System.out.println("doc="+hits[i].doc+" score="+hits[i].score);
	continue;
	}

	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");
	}

	}

	if (!interactive \|\| end == 0) {
	break;
	}

	if (numTotalHits >= end) {
	boolean quit = false;
	while (true) {
	System.out.print("Press ");
	if (start - hitsPerPage >= 0) {
	System.out.print("(p)revious page, ");
	}
	if (start + hitsPerPage < numTotalHits) {
	System.out.print("(n)ext page, ");
	}
	System.out.println("(q)uit or enter number to jump to a page.");

	String line = in.readLine();
	if (line.length() == 0 \|\| line.charAt(0)=='q') {
	quit = true;
	break;
	}
	if (line.charAt(0) == 'p') {
	start = Math.max(0, start - hitsPerPage);
	break;
	} else if (line.charAt(0) == 'n') {
	if (start + hitsPerPage < numTotalHits) {
	start+=hitsPerPage;
	}
	break;
	} else {
	int page = Integer.parseInt(line);
	if ((page - 1) * hitsPerPage < numTotalHits) {
	start = (page - 1) * hitsPerPage;
	break;
	} else {
	System.out.println("No such page");
	}
	}
	}
	if (quit) break;
	end = Math.min(numTotalHits, start + hitsPerPage);
	}
	}
	}
	}