blendeddatesorting.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: 1.9 $ $Date: 2006/01/25 16:56:17 $
 *
 *  Copyright (c) 2002-2003 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 com.ultraseek.xpa.search.*;
import com.ultraseek.xpa.server.UltraseekServer;

/**
 *  A simple demo application that searches 
 *  several Ultraseek collections
 *  and sorts the results by date and relevance.
 *
 * The order of results in the <code>SearchResultList</code> 
 * is different depending on how
 * Date sorting is blended with Relevance sorting.
 */
public class BlendedDateSorting {

  public BlendedDateSorting() {}

  static void printList(String label,
                        SearchResultList searchResultList,
                        int count) {
    System.out.println();
    System.out.println(label);
    try {
      System.out.print("size()="+searchResultList.size() + " " +
                       "getResultCount()="+searchResultList.getResultCount());
    } catch (IOException e) {
      System.out.println("Exception on getResultCount()"+ e );
    }
    System.out.println();
    int counter = 1;
    if (!searchResultList.isEmpty()) {
      Iterator iterator = searchResultList.iterator();
      while (iterator.hasNext() && count-- > 0) {
        SearchResult searchResult = (SearchResult)iterator.next();
        System.out.println();
        try {
          System.out.println(counter++ + ": " + searchResult.getURL());
          System.out.println("   " + searchResult.getTitle());
          System.out.println("   " + searchResult.getDate());
        } catch (IOException e) {
          System.out.println("Exception: "+e);
        }
      }
    } else {
      System.out.println("There are no search results.");
    }
    System.out.println("-------------------------------------------");
  };

  /**
   * Display the name of each search collection supported by a server
   */
  static void showCollections(SearchServer searchServer)
    throws IOException {
    Collection collections = searchServer.getSearchCollections();
    Iterator collection = collections.iterator();
    System.out.println( searchServer.toString() 
                        + " has the following collections:" );
    while (collection.hasNext()) {
      SearchCollection col = (SearchCollection) collection.next();
      System.out.println( col.getID() + " (" + col.getName() + ")" );
    }
    System.out.println();
  }

  /**
   * Return the first count collections from the given searchServer.
   */
  static SearchCollection[] getCollections(SearchServer searchServer,
                                           int count)
    throws IOException {
    Collection collections = searchServer.getSearchCollections();
    SearchCollection[] result;
    result = new SearchCollection[Math.min(collections.size(),count)];
    Iterator collection = collections.iterator();
    int i = 0;
    while (collection.hasNext() && count-- > 0) {
      SearchCollection col = (SearchCollection) collection.next();
      result[i++] = col;
    };
    return result;
  };

  static final int SORT_SIZE = 5;         // Number of results to collect
  static final int NUM_COLLECTIONS = 3;   // Number of collections to search
  static final int DISPLAY_SIZE = 4;      // Number of results to display

  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 is a simple demo application that searches");
    System.out.println("several Ultraseek collections");
    System.out.println("and sorts the results by date and relevance using several methods.");
    System.out.println();
    SearchServer searchServer = new UltraseekServer("software-search.ultraseek.com",80);

    SearchCollection[] collections = getCollections(searchServer, NUM_COLLECTIONS);
    System.out.println("Searching the following collections on " 
                       + searchServer.toString());
    for (int i = 0; i < collections.length; i++)
      System.out.println( "   " + collections[i].getName() );

    // Method 1
    /* Blend the results from the collections, 
       Sort the blended results by date */
    DateSortingSearchable method1;
    {
      CompositeSearchable blended = new CompositeSearchable( collections );
      method1 = new DateSortingSearchable(blended);
      method1.setSortSize(SORT_SIZE);
    }

    // Method 2
    /* Sort the results from each collection by date,
       blend the results into a single list by relevance. */
    CompositeSearchable method2;
    {
      DateSortingSearchable[] sorted = new DateSortingSearchable[collections.length];
      for (int i = 0; i < collections.length; i++) {
        sorted[i] = new DateSortingSearchable(collections[i]);
        sorted[i].setSortSize(SORT_SIZE);
      }
      method2 = new CompositeSearchable(sorted);
    }


    // Method 3
    /* Sort the results from each collection by date.
       Blend the results into a single list by relevance.
       Sort the resulting list by date. */
    DateSortingSearchable method3;
    {
      DateSortingSearchable[] sorted = new DateSortingSearchable[collections.length];
      for (int i = 0; i < collections.length; i++) {
        sorted[i] = new DateSortingSearchable(collections[i]);
      }
      CompositeSearchable blended = new CompositeSearchable(sorted);
      method3 = new DateSortingSearchable(blended);
      method3.setSortSize(SORT_SIZE);
    }

    Searchable searchables[] = new Searchable[] {
      method1,
      method2,
      method3 };
    String labels[] = new String[] {
      "blend, then DateSort",
      "DateSort each collection, then blend",
      "DateSort each collection, then blend, then DateSort" };
                                                          
    for (;;) {
      System.out.println();
      System.out.println("Enter a query. (control-c to end)");
      System.out.print("search: ");
      String line = bufferedReader.readLine();
      if (line==null) break;

      Query query = Query.parse(line);
      for (int i = 0; i < searchables.length; i++) {
        SearchResultList list = searchables[i].search(query);
        printList( labels[i], list, DISPLAY_SIZE);
      };

    }
  }
}