mcs/class/System.Data/System.Data.Common/DbDataRecord.cs

   1 //
   2 // System.Data.Common.DbDataRecord.cs
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //
   7 // Copyright (C) Tim Coleman, 2002-2003
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  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 using System.Collections;
  34 using System.ComponentModel;
  35 using System.Data;
  36
  37 namespace System.Data.Common {
  38         public class DbDataRecord : IDataRecord, ICustomTypeDescriptor
  39         {
  40                 #region Fields
  41
  42                 SchemaInfo[] schema;
  43                 object[] values;
  44                 int fieldCount;
  45                 FieldNameLookup lookup;
  46
  47                 #endregion
  48
  49                 #region Constructors
  50
  51 #if NET_2_0
  52                 [MonoTODO]
  53                 public DbDataRecord (object[] values, PropertyDescriptorCollection descriptors, FieldNameLookup fieldNameLookup)
  54                 {
  55                 }
  56
  57                 [MonoTODO]
  58                 public DbDataRecord (SchemaInfo[] schemaInfo, object[] values, PropertyDescriptorCollection descriptors, FieldNameLookup fieldNameLookup)
  59                 {
  60                 }
  61 #endif
  62
  63                 internal DbDataRecord (SchemaInfo[] schema, object[] values, FieldNameLookup lookup)
  64                 {
  65                         this.schema = schema;
  66                         this.lookup = lookup;
  67                         this.values = values;
  68                         this.fieldCount = values.Length;
  69                 }
  70
  71                 #endregion
  72
  73                 #region Properties
  74
  75                 public int FieldCount {
  76                         get { return fieldCount; }
  77                 }
  78
  79                 public object this [string name] {
  80                         get { return this [GetOrdinal (name)]; }
  81                 }
  82
  83                 [System.Runtime.CompilerServices.IndexerName("Item")]
  84                 public object this [int index] {
  85                         get { return GetValue (index); }
  86                 }
  87
  88                 #endregion
  89
  90                 #region Methods
  91
  92                 public bool GetBoolean (int i)
  93                 {
  94                         return (bool) GetValue (i);
  95                 }
  96
  97                 public byte GetByte (int i)
  98                 {
  99                         return (byte) GetValue (i);
 100                 }
 101
 102                 public long GetBytes (int i, long dataIndex, byte[] buffer, int bufferIndex, int length)
 103                 {
 104                          object value = GetValue (i);
 105                          if (!(value is byte []))
 106                                 throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
 107
 108                         if ( buffer == null ) {
 109                                 // Return length of data
 110                                 return ((byte []) value).Length;
 111                         }
 112                         else {
 113                                 // Copy data into buffer
 114                                 Array.Copy ((byte []) value, (int) dataIndex, buffer, bufferIndex, length);
 115                                 return ((byte []) value).Length - dataIndex;
 116                         }
 117
 118                 }
 119
 120                 public char GetChar (int i)
 121                 {
 122                         return (char) GetValue (i);
 123                 }
 124
 125                 public long GetChars (int i, long dataIndex, char[] buffer, int bufferIndex, int length)
 126                 {
 127                         object value = GetValue (i);
 128                         char [] valueBuffer;
 129
 130                         if (value is char[])
 131                                 valueBuffer = (char[])value;
 132                         else if (value is string)
 133                                 valueBuffer = ((string)value).ToCharArray();
 134                         else
 135                                 throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
 136                                                                                                                              if ( buffer == null ) {
 137                                 // Return length of data
 138                                 return valueBuffer.Length;
 139                         }
 140                         else {
 141                                 // Copy data into buffer
 142                                 Array.Copy (valueBuffer, (int) dataIndex, buffer, bufferIndex, length);
 143                                 return valueBuffer.Length - dataIndex;
 144                         }
 145
 146                 }
 147
 148                 public IDataReader GetData (int i)
 149                 {
 150                         return (IDataReader) GetValue (i);
 151                 }
 152
 153                 public string GetDataTypeName (int i)
 154                 {
 155                         return schema[i].DataTypeName;
 156                 }
 157
 158                 public DateTime GetDateTime (int i)
 159                 {
 160                         return (DateTime) GetValue (i);
 161                 }
 162
 163                 public decimal GetDecimal (int i)
 164                 {
 165                         return (decimal) GetValue (i);
 166                 }
 167
 168                 public double GetDouble (int i)
 169                 {
 170                         return (double) GetValue (i);
 171                 }
 172
 173                 public Type GetFieldType (int i)
 174                 {
 175                         return schema[i].FieldType;
 176                 }
 177
 178                 public float GetFloat (int i)
 179                 {
 180                         return (float) GetValue (i);
 181                 }
 182
 183                 public Guid GetGuid (int i)
 184                 {
 185                         return (Guid) GetValue (i);
 186                 }
 187
 188                 public short GetInt16 (int i)
 189                 {
 190                         return (short) GetValue (i);
 191                 }
 192
 193                 public int GetInt32 (int i)
 194                 {
 195                         return (int) GetValue (i);
 196                 }
 197
 198                 public long GetInt64 (int i)
 199                 {
 200                         return (long) GetValue (i);
 201                 }
 202
 203                 public string GetName (int i)
 204                 {
 205                         return (string) lookup [i];
 206                 }
 207
 208 #if NET_2_0
 209                 [MonoTODO]
 210                 public virtual object GetObjectRef (int i)
 211                 {
 212                         throw new NotImplementedException ();
 213                 }
 214 #endif
 215
 216                 public int GetOrdinal (string name)
 217                 {
 218                         return lookup.IndexOf (name);
 219                 }
 220
 221                 public string GetString (int i)
 222                 {
 223                         return (string) GetValue (i);
 224                 }
 225
 226                 public object GetValue (int i)
 227                 {
 228                        if ((i < 0) || (i > fieldCount))
 229                                 throw new IndexOutOfRangeException();
 230
 231                         object value = values [i];
 232                         if (value == null)
 233                                 value = DBNull.Value;
 234                         return value;
 235                 }
 236
 237                 public int GetValues (object[] values)
 238                 {
 239                         if(values == null)
 240                                 throw new ArgumentNullException("values");
 241
 242                         int count = values.Length > this.values.Length ? this.values.Length : values.Length;
 243                         for(int i = 0; i < count; i++)
 244                                 values[i] = this.values[i];
 245
 246                         return count;
 247                 }
 248
 249                 [MonoTODO]
 250                 AttributeCollection ICustomTypeDescriptor.GetAttributes ()
 251                 {
 252                         return new AttributeCollection(null);
 253                 }
 254
 255                 [MonoTODO]
 256                 string ICustomTypeDescriptor.GetClassName ()
 257                 {
 258                         return "";
 259                 }
 260
 261                 [MonoTODO]
 262                 string ICustomTypeDescriptor.GetComponentName ()
 263                 {
 264                         return null;
 265                 }
 266
 267                 [MonoTODO]
 268                 TypeConverter ICustomTypeDescriptor.GetConverter ()
 269                 {
 270                         return null;
 271                 }
 272
 273                 [MonoTODO]
 274                 EventDescriptor ICustomTypeDescriptor.GetDefaultEvent ()
 275                 {
 276                         return null;
 277                 }
 278
 279                 [MonoTODO]
 280                 PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty ()
 281                 {
 282                         return null;
 283                 }
 284
 285                 [MonoTODO]
 286                 object ICustomTypeDescriptor.GetEditor (Type editorBaseType)
 287                 {
 288                         return null;
 289                 }
 290
 291                 [MonoTODO]
 292                 EventDescriptorCollection ICustomTypeDescriptor.GetEvents ()
 293                 {
 294                         return new EventDescriptorCollection(null);
 295                 }
 296
 297                 [MonoTODO]
 298                 EventDescriptorCollection ICustomTypeDescriptor.GetEvents (Attribute[] attributes)
 299                 {
 300                         return new EventDescriptorCollection(null);
 301                 }
 302
 303                 [MonoTODO]
 304                 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties ()
 305                 {
 306                         DataColumnPropertyDescriptor[] descriptors =
 307                                 new DataColumnPropertyDescriptor[FieldCount];
 308
 309                         DataColumnPropertyDescriptor descriptor;
 310                         DataColumn dataColumn;
 311                         for(int col = 0; col < FieldCount; col++) {
 312                                 descriptor = new DataColumnPropertyDescriptor(
 313                                         GetName(col), col, null);
 314                                 descriptor.SetComponentType(typeof(DbDataRecord));
 315                                 descriptor.SetPropertyType(GetFieldType(col));
 316
 317                                 descriptors[col] = descriptor;
 318                         }
 319
 320                         return new PropertyDescriptorCollection (descriptors);
 321                 }
 322
 323                 [MonoTODO]
 324                 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties (Attribute[] attributes)
 325                 {
 326                         PropertyDescriptorCollection descriptors;
 327                         descriptors = ((ICustomTypeDescriptor) this).GetProperties ();
 328                         // TODO: filter out descriptors which do not contain
 329                         //       any of those attributes
 330                         //       except, those descriptors
 331                         //       that contain DefaultMemeberAttribute
 332                         return descriptors;
 333                 }
 334
 335                 [MonoTODO]
 336                 object ICustomTypeDescriptor.GetPropertyOwner (PropertyDescriptor pd)
 337                 {
 338                         return this;
 339                 }
 340
 341                 public bool IsDBNull (int i)
 342                 {
 343                         return GetValue (i) == DBNull.Value;
 344                 }
 345 #if NET_2_0
 346                 public virtual bool IsSetAsDefault (int i)
 347                 {
 348                         throw new NotImplementedException ();
 349                 }
 350
 351                 public void SetSchemaInfo (SchemaInfo[] schemaInfo)
 352                 {
 353                         throw new NotImplementedException ();
 354                 }
 355 #endif
 356
 357                 #endregion // Methods
 358         }
 359 }