beagled/IndexerRequest.cs

   1 //
   2 // IndexerRequest.cs
   3 //
   4 // Copyright (C) 2005 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 using System;
  28 using System.Collections;
  29 using System.Xml.Serialization;
  30
  31 using Beagle.Util;
  32
  33 namespace Beagle.Daemon {
  34
  35         public class IndexerRequest {
  36
  37                 public bool OptimizeIndex = false;
  38
  39                 private Hashtable indexables_by_uri = UriFu.NewHashtable ();
  40                 private ArrayList indexables = null;
  41
  42                 // FIXME: We don't try to keep the ArrayList and the Hashtable
  43                 // in-sync.  This is a hack to make XML serialization work easily,
  44                 // and it assumes that an IndexerRequest is never changed after
  45                 // it has been serialized.
  46
  47                 public void Clear ()
  48                 {
  49                         OptimizeIndex = false;
  50                         indexables_by_uri.Clear ();
  51                         indexables = null;
  52                 }
  53
  54                 public void Add (Indexable indexable)
  55                 {
  56                         if (indexables != null)
  57                                 throw new Exception ("Attempt to add to a serialized IndexerRequest");
  58
  59                         if (indexable == null)
  60                                 return;
  61
  62                         Indexable prior;
  63                         prior = indexables_by_uri [indexable.Uri] as Indexable;
  64
  65                         if (prior != null) {
  66
  67                                 switch (indexable.Type) {
  68
  69                                 case IndexableType.Add:
  70                                 case IndexableType.Remove:
  71                                         // Do nothing, and just clobber the prior indexable.
  72                                         break;
  73
  74                                 case IndexableType.PropertyChange:
  75                                         // Merge with the prior indexable.
  76                                         prior.Merge (indexable);
  77                                         indexable = prior;
  78                                         break;
  79                                 }
  80                         }
  81
  82                         indexables_by_uri [indexable.Uri] = indexable;
  83                 }
  84
  85                 public Indexable GetByUri (Uri uri)
  86                 {
  87                         if (indexables_by_uri != null)
  88                                 return indexables_by_uri [uri] as Indexable;
  89
  90                         // Fall back to using the list.  This happens when we
  91                         // have been serialized.  Which is sort of lame.
  92                         foreach (Indexable indexable in indexables) {
  93                                 if (UriFu.Equals (uri, indexable.Uri))
  94                                         return indexable;
  95                         }
  96                         return null;
  97                 }
  98
  99                 [XmlArray (ElementName="Indexables")]
 100                 [XmlArrayItem (ElementName="Indexable", Type=typeof (Indexable))]
 101                 public ArrayList Indexables {
 102                         get {
 103                                 if (indexables == null) {
 104                                         indexables = new ArrayList ();
 105                                         foreach (Indexable indexable in indexables_by_uri.Values)
 106                                                 indexables.Add (indexable);
 107                                         indexables.Sort (); // sort into ascending timestamp order
 108                                 }
 109                                 return indexables;
 110                         }
 111                 }
 112
 113                 [XmlIgnore]
 114                 public int Count {
 115                         get { return indexables != null ? indexables.Count : indexables_by_uri.Count; }
 116                 }
 117
 118                 [XmlIgnore]
 119                 public bool IsEmpty {
 120                         get { return Count == 0 && ! OptimizeIndex; }
 121                 }
 122
 123                 public void Cleanup ()
 124                 {
 125                         if (indexables_by_uri != null)
 126                                 foreach (Indexable i in indexables_by_uri.Values)
 127                                         i.Cleanup ();
 128                         else
 129                                 foreach (Indexable i in indexables)
 130                                         i.Cleanup ();
 131                 }
 132         }
 133 }