mcs/class/System.Data.ObjectSpaces/System.Data.ObjectSpaces/ObjectSpace.cs

   1 //
   2 // System.Data.ObjectSpaces.ObjectSpace.cs : Handles high-level object persistence interactions with a data source.
   3 //
   4 // Authors:
   5 //   Mark Easton (mark.easton@blinksoftware.co.uk)
   6 //   Tim Coleman (tim@timcoleman.com)
   7 //
   8 // (C) BLiNK Software Ltd.  http://www.blinksoftware.co.uk
   9 // Copyright (C) Tim Coleman, 2003
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 #if NET_2_0
  34
  35 using System.Collections;
  36 using System.Data;
  37 using System.Data.Mapping;
  38 using System.Data.ObjectSpaces.Query;
  39 using System.Data.ObjectSpaces.Schema;
  40
  41 namespace System.Data.ObjectSpaces
  42 {
  43         public class ObjectSpace
  44         {
  45                 #region Fields
  46
  47                 MappingSchema map;
  48                 ObjectSources sources;
  49                 ObjectSchema os;
  50                 CommonObjectContext context;
  51
  52                 #endregion // Fields
  53
  54                 #region Constructors
  55
  56                 private ObjectSpace ()
  57                         : base ()
  58                 {
  59                         os = new ObjectSchema ();
  60                         context = new CommonObjectContext (os);
  61                 }
  62
  63                 [MonoTODO]
  64                 public ObjectSpace (MappingSchema map, ObjectSources sources)
  65                         : this ()
  66                 {
  67                         this.map = map;
  68                         this.sources = sources;
  69                 }
  70
  71                 [MonoTODO ("Figure out correct name")]
  72                 public ObjectSpace (string mapFile, IDbConnection con)
  73                         : this ()
  74                 {
  75                         map = new MappingSchema (mapFile);
  76                         sources = new ObjectSources ();
  77                         sources.Add (map.DataSources [0].Name, con);
  78                 }
  79
  80                 public ObjectSpace (string mapFile, ObjectSources sources)
  81                         : this ()
  82                 {
  83                         map = new MappingSchema (mapFile);
  84                         this.sources = sources;
  85                 }
  86
  87                 [MonoTODO ("Figure out correct name")]
  88                 public ObjectSpace (MappingSchema map, IDbConnection con)
  89                         : this ()
  90                 {
  91                         this.map = map;
  92                         sources = new ObjectSources ();
  93                         sources.Add (map.DataSources [0].Name, con);
  94                 }
  95
  96                 #endregion // Constructors
  97
  98                 #region Properties
  99
 100                 internal ObjectContext ObjectContext {
 101                         get { return context; }
 102                 }
 103
 104                 #endregion // Properties
 105
 106                 #region Methods
 107
 108                 public object GetObject (ObjectQuery query, object[] parameters)
 109                 {
 110                         return GetObject (GetObjectReader (query, parameters));
 111                 }
 112
 113                 public object GetObject (Type type, string queryString)
 114                 {
 115                         return GetObject (GetObjectReader (type, queryString));
 116                 }
 117
 118                 public object GetObject (Type type, string queryString, string relatedSpan)
 119                 {
 120                         return GetObject (GetObjectReader (type, queryString));
 121                 }
 122
 123                 private object GetObject (ObjectReader reader)
 124                 {
 125                         reader.Read ();
 126                         object result = reader.Current;
 127                         reader.Close ();
 128                         return result;
 129                 }
 130
 131                 public ObjectReader GetObjectReader (ObjectQuery query, object[] parameters)
 132                 {
 133                         ObjectExpression oe = OPath.Parse (query, os);
 134                         CompiledQuery cq = oe.Compile (map);
 135                         return ObjectEngine.GetObjectReader (sources, context, cq, parameters);
 136                 }
 137
 138                 public ObjectReader GetObjectReader (Type type, string queryString)
 139                 {
 140                         return GetObjectReader (new ObjectQuery (type, queryString), null);
 141                 }
 142
 143                 public ObjectReader GetObjectReader (Type type, string queryString, string relatedSpan)
 144                 {
 145                         return GetObjectReader (new ObjectQuery (type, queryString, relatedSpan), null);
 146                 }
 147
 148                 public ObjectSet GetObjectSet (ObjectQuery query, object[] parameters)
 149                 {
 150                         return GetObjectSet (GetObjectReader (query, parameters));
 151                 }
 152
 153                 public ObjectSet GetObjectSet (Type type, string queryString)
 154                 {
 155                         return GetObjectSet (GetObjectReader (type, queryString));
 156                 }
 157
 158                 public ObjectSet GetObjectSet (Type type, string queryString, string relatedSpan)
 159                 {
 160                         return GetObjectSet (GetObjectReader (type, queryString, relatedSpan));
 161                 }
 162
 163                 private ObjectSet GetObjectSet (ObjectReader reader)
 164                 {
 165                         ObjectSet result = new ObjectSet ();
 166                         foreach (object o in reader)
 167                                 result.Add (o);
 168                         reader.Close ();
 169                         return result;
 170                 }
 171
 172                 public void MarkForDeletion (object obj)
 173                 {
 174                         MarkForDeletion (new object[] {obj});
 175                 }
 176
 177                 [MonoTODO]
 178                 public void MarkForDeletion (ICollection objs) {}
 179
 180                 public void PersistChanges (object obj)
 181                 {
 182                         PersistChanges (new object[] {obj}, new PersistenceOptions ());
 183                 }
 184
 185                 public void PersistChanges (object obj, PersistenceOptions options)
 186                 {
 187                         PersistChanges (new object[] {obj}, options);
 188                 }
 189
 190                 public void PersistChanges (ICollection objs)
 191                 {
 192                         PersistChanges (objs, new PersistenceOptions ());
 193                 }
 194
 195                 public void PersistChanges (ICollection objs, PersistenceOptions options)
 196                 {
 197                         ObjectEngine.PersistChanges (map, sources, context, objs, options);
 198                 }
 199
 200                 public void Resync (object obj, Depth depth)
 201                 {
 202                         Resync (new object[] {obj}, depth);
 203                 }
 204
 205                 public void Resync (ICollection objs, Depth depth)
 206                 {
 207                         ObjectEngine.Resync (map, sources, context, objs, depth);
 208                 }
 209
 210                 public void StartTracking (object obj, InitialState state)
 211                 {
 212                         StartTracking (new object[] {obj}, state);
 213                 }
 214
 215                 [MonoTODO]
 216                 public void StartTracking (ICollection objs, InitialState state)
 217                 {
 218                 }
 219
 220                 #endregion // Methods
 221         }
 222 }
 223
 224 #endif