FileDocCategorySizeDatePackage
SearchFiles.javaAPI DocApache Lucene 2.0.05635Fri May 26 09:54:20 BST 2006org.apache.lucene.demo

SearchFiles

public class SearchFiles extends Object
Simple command-line based search demo.

Fields Summary
Constructors Summary
private SearchFiles()

Methods Summary
public static voidmain(java.lang.String[] args)
Simple command-line based search demo.

    String usage =
      "Usage: java org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-raw] [-norms field]";
    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 normsField = null;
    
    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 ("-repeat".equals(args[i])) {
        repeat = Integer.parseInt(args[i+1]);
        i++;
      } else if ("-raw".equals(args[i])) {
        raw = true;
      } else if ("-norms".equals(args[i])) {
        normsField = args[i+1];
        i++;
      }
    }
    
    IndexReader reader = IndexReader.open(index);

    if (normsField != null)
      reader = new OneNormsReader(reader, normsField);

    Searcher searcher = new IndexSearcher(reader);
    Analyzer analyzer = new StandardAnalyzer();

    BufferedReader in = null;
    if (queries != null) {
      in = new BufferedReader(new FileReader(queries));
    } else {
      in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
    }
      QueryParser parser = new QueryParser(field, analyzer);
    while (true) {
      if (queries == null)                        // prompt the user
        System.out.print("Query: ");

      String line = in.readLine();

      if (line == null || line.length() == -1)
        break;

      Query query = parser.parse(line);
      System.out.println("Searching for: " + query.toString(field));

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

      System.out.println(hits.length() + " total matching documents");

      final int HITS_PER_PAGE = 10;
      for (int start = 0; start < hits.length(); start += HITS_PER_PAGE) {
        int end = Math.min(hits.length(), start + HITS_PER_PAGE);
        for (int i = start; i < end; i++) {

          if (raw) {                              // output raw format
            System.out.println("doc="+hits.id(i)+" score="+hits.score(i));
            continue;
          }

          Document doc = hits.doc(i);
          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 (queries != null)                      // non-interactive
          break;
        
        if (hits.length() > end) {
          System.out.print("more (y/n) ? ");
          line = in.readLine();
          if (line.length() == 0 || line.charAt(0) == 'n")
            break;
        }
      }
    }
    reader.close();