beagled/Queryable.cs

   1 //
   2 // Queryable.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27
  28 using System;
  29 using System.Collections;
  30
  31 using Beagle.Util;
  32 using Beagle;
  33
  34 namespace Beagle.Daemon {
  35
  36         public class Queryable {
  37
  38                 private QueryableFlavor flavor;
  39                 private IQueryable iqueryable;
  40
  41                 public Queryable (QueryableFlavor _flavor,
  42                                   IQueryable _iqueryable)
  43                 {
  44                         flavor = _flavor;
  45                         iqueryable = _iqueryable;
  46                 }
  47
  48                 public void Start ()
  49                 {
  50                         iqueryable.Start ();
  51                 }
  52
  53                 public string Name {
  54                         get { return flavor.Name; }
  55                 }
  56
  57                 public QueryDomain Domain {
  58                         get { return flavor.Domain; }
  59                 }
  60
  61                 public bool AcceptQuery (Query query)
  62                 {
  63                         return query != null
  64                                 && (query.IsIndexListener || ! query.IsEmpty)
  65                                 && query.AllowsDomain (Domain)
  66                                 && iqueryable.AcceptQuery (query);
  67                 }
  68
  69                 public void DoQuery (Query query, IQueryResult result, IQueryableChangeData change_data)
  70                 {
  71                         try {
  72                                 iqueryable.DoQuery (query, result, change_data);
  73                         } catch (Exception ex) {
  74                                 Logger.Log.Warn ("Caught exception calling DoQuery on '{0}'", Name);
  75                                 Logger.Log.Warn (ex);
  76                         }
  77                 }
  78
  79                 public string GetSnippet (string[] query_terms, Hit hit)
  80                 {
  81                         if (hit == null)
  82                                 return null;
  83
  84                         // Sanity-check: make sure this Hit actually came out of this Queryable
  85                         if (QueryDriver.GetQueryable (hit.Source) != this) {
  86                                 string msg = String.Format ("Queryable mismatch in GetSnippet: {0} vs {1}", hit.Source, this);
  87                                 throw new Exception (msg);
  88                         }
  89
  90                         try {
  91                                 return iqueryable.GetSnippet (query_terms, hit);
  92                         } catch (Exception ex) {
  93                                 Logger.Log.Warn ("Caught exception calling DoQuery on '{0}'", Name);
  94                                 Logger.Log.Warn (ex);
  95                         }
  96
  97                         return null;
  98                 }
  99
 100                 public QueryableStatus GetQueryableStatus ()
 101                 {
 102                         QueryableStatus status = iqueryable.GetQueryableStatus ();
 103
 104                         if (status == null)
 105                                 status = new QueryableStatus ();
 106
 107                         status.Name = Name;
 108
 109                         return status;
 110                 }
 111         }
 112 }
 113