searchkeywords.java

关于Ultraseek的一些用法,刚初学,所以都是比较简单

/* -*- mode:java; indent-tabs-mode:nil; c-basic-offset:2 -*-
 *
 *  $RCSFile$ $Revision: 1.7 $ $Date: 2006/02/01 00:20:29 $
 *
 *  Copyright (c) 2002-2004 Autonomy Corp.  All Rights Reserved.
 *  Permission to use, copy, modify, and distribute this file is hereby
 *  granted without fee, provided that the above copyright notice appear
 *  in all copies.
 */

import java.io.*;
import java.util.*;
import java.net.URL;

import com.ultraseek.xpa.search.*;

/**
 *  A simple demo application that searches 
 *  an in-memory keyword list for matches.
 *  This is useful for "editorially picked" search
 *  results.
 *
 * @see KeywordSearchable
 * @see EditorialSearchable
 */
public class SearchKeywords {
  SearchKeywords() { }

  /**
   * Number of results to print as part of the sample output.
   */
  static final int MAX_RESULTS = 4;
  public final static boolean VERBOSE = false;


  /** Utility function to print out verbose messages */
  public static void VerbosePrint(String msg) {
    if (VERBOSE) System.out.println(msg);
  }

  /** Utility function to input a keyword string */
  public static String inputKeyword(BufferedReader in, String prompt) 
    throws IOException {
    System.out.print(prompt +": ");
    String keyword = in.readLine().trim();
    return keyword;
  }

  /** Utility function to input y/n response */
  public static boolean inputYesNo(BufferedReader in, String prompt)
    throws IOException {
    while (true) {
      System.out.print(prompt + " (y/n): ");
      String response = in.readLine();
      if (response != null) {
        response = response.trim().toUpperCase();
        if (response.length() > 0) {
          char answer = response.charAt(0);
          if (answer == 'Y') return true;
          if (answer == 'N') return false;
        }
      }
      System.out.println("Must enter y or n" );
    }
  }

  /**
   * For demo purposes, create a search result to return for a keyword.
   * In actual use this would be your editorially picked result
   * to return for the keyword.
   */
  public static FixedSearchResult makeKeywordResult(String title) {
    Date now = new Date();
    URL url = null;
    try {
      url = new URL("http://www.yourcorp.com/"+title );
    } catch (java.net.MalformedURLException e) { /*ignore*/ };
    return new FixedSearchResult((float)1.0,      // score
                                 (float)0.0,      // quality
                                 url,             // url
                                 "Title: " + title,           // title
                                 "Description: " + title,     // description
                                 "",              // publisher
                                 "",              // fsKeywords
                                 0,               // size
                                 now,             // date
                                 now,             // indexed
                                 (short)0,        // remoteLinkCount
                                 (short)0,        // flags
                                 null,            // topics
                                 null,            // termTFs
                                 null,            // extra
                                 null,            // SearchServer
                                 null             // SearchCollection
                                 );
  }

  /**
   * Show the results from a search
   */
  public static void showResults(String prompt,
                                 SearchResultList searchResultList) {
    System.out.println(prompt);
    System.out.println();
    VerbosePrint("Here is the SearchResultList object:\n"+ 
                 searchResultList);
    try {
      Collection relatedTopics = searchResultList.getRelatedTopics();
      System.out.println();
      if (relatedTopics != null || !relatedTopics.isEmpty()) {
        System.out.println("Here are the SearchTopic objects:");
        Iterator iterator = relatedTopics.iterator();
        while (iterator.hasNext()) {
          SearchTopic searchTopic = (SearchTopic)iterator.next();
          System.out.println(searchTopic);
        }
      } else {
        System.out.println("There are no SearchTopic objects.");
      }
      System.out.println();
      if (!searchResultList.isEmpty()) {
        System.out.println("There are about " + searchResultList.getResultCount() 
                           + " search results.");
        System.out.println("Here are the SearchResult objects:");
        Iterator iterator = searchResultList.iterator();
        int counter = 0;
        try {
          while (iterator.hasNext() && counter++ < MAX_RESULTS) {
            SearchResult searchResult = (SearchResult)iterator.next();
            System.out.println();
            System.out.println("" + counter + "  " + searchResult.getTitle() + "\n" +
                               "   " + searchResult.getDescription() );
            VerbosePrint(searchResult.toString());
        }
        } catch (NoSuchElementException e) {
          /* No more results from server, not an error. */
        }
      } else {
        System.out.println("There are no SearchResult objects.");
      }
    } catch (IOException e) {
      System.out.println( "Exception while printing results: "+ e.toString());
    }
  }


  public static void main(String[] args) throws Exception {
    InputStreamReader inputStreamReader = new InputStreamReader(System.in);
    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
    System.out.println();
    System.out.println("This demo application searches");
    System.out.println("in a program defined keyword list.");

    KeywordSearchable kwSearchable = new KeywordSearchable();
    if (inputYesNo(bufferedReader,"Y for Exact match, N for any terms match"))
      kwSearchable.setExact(true);
    else
      kwSearchable.setExact(false);

    // Collect a title for a dummy search result.  
    // Then collect a series of keywords to associate with the title.
    System.out.println();
    System.out.println("The application will now collect 'Search Results'");
    System.out.println("and keywords to associate with each result.");
    System.out.println();
    for (int count = 1;;count++) {
      String title = inputKeyword(bufferedReader, 
                                  "Enter Title for search result " +
                                  count + ": RETURN to end");
      if ((title == null) || title.length() <= 0) break;
      List keywords = new ArrayList(5);
      for (;;) {
        String keyword = inputKeyword(bufferedReader, "Enter keyword for '" + 
                                      title + "', RETURN to end" );
        if ((keyword == null) || keyword.length() <= 0) break;
        keywords.add(keyword);
      }
      FixedSearchResult res = makeKeywordResult(title);
      kwSearchable.add((String [])keywords.toArray(new String[keywords.size()]),res);
    }

    VerbosePrint("Here is the KeywordSearchable object:\n"+
                 kwSearchable);

    for (;;) {
      System.out.println();
      System.out.println("Enter a query.");
      System.out.print("search: ");
      String line = bufferedReader.readLine();
      if (line==null) break;

      Query query = Query.parse(line);
      System.out.println();
      VerbosePrint("Here is the Query object:\n"+
                   query);

      /* Start the searches running */
      SearchResultList keywordResults = kwSearchable.search(query);

      /* Now display the results */
      showResults( "Keyword Matches", keywordResults );
    }
  }
}