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 using System.Collections;
  11 using System.ComponentModel;
  12 using System.Data;
  13
  14 namespace System.Data.Common {
  15         public class DbDataRecord : IDataRecord, ICustomTypeDescriptor
  16         {
  17                 #region Fields
  18
  19                 SchemaInfo[] schema;
  20                 object[] values;
  21                 int fieldCount;
  22                 FieldNameLookup lookup;
  23
  24                 #endregion
  25
  26                 #region Constructors
  27
  28 #if NET_1_2
  29                 [MonoTODO]
  30                 public DbDataRecord (object[] values, PropertyDescriptorCollection descriptors, FieldNameLookup fieldNameLookup)
  31                 {
  32                 }
  33
  34                 [MonoTODO]
  35                 public DbDataRecord (SchemaInfo[] schemaInfo, object[] values, PropertyDescriptorCollection descriptors, FieldNameLookup fieldNameLookup)
  36                 {
  37                 }
  38 #endif
  39
  40                 internal DbDataRecord (SchemaInfo[] schema, object[] values, FieldNameLookup lookup)
  41                 {
  42                         this.schema = schema;
  43                         this.lookup = lookup;
  44                         this.values = values;
  45                         this.fieldCount = values.Length;
  46                 }
  47
  48                 #endregion
  49
  50                 #region Properties
  51
  52                 public int FieldCount {
  53                         get { return fieldCount; }
  54                 }
  55
  56                 public object this [string name] {
  57                         get { return this [GetOrdinal (name)]; }
  58                 }
  59
  60                 [System.Runtime.CompilerServices.IndexerName("Item")]
  61                 public object this [int index] {
  62                         get { return GetValue (index); }
  63                 }
  64
  65                 #endregion
  66
  67                 #region Methods
  68
  69                 public bool GetBoolean (int i)
  70                 {
  71                         return (bool) GetValue (i);
  72                 }
  73
  74                 public byte GetByte (int i)
  75                 {
  76                         return (byte) GetValue (i);
  77                 }
  78
  79                 public long GetBytes (int i, long dataIndex, byte[] buffer, int bufferIndex, int length)
  80                 {
  81                          object value = GetValue (i);
  82                          if (!(value is byte []))
  83                                 throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
  84
  85                         if ( buffer == null ) {
  86                                 // Return length of data
  87                                 return ((byte []) value).Length;
  88                         }
  89                         else {
  90                                 // Copy data into buffer
  91                                 Array.Copy ((byte []) value, (int) dataIndex, buffer, bufferIndex, length);
  92                                 return ((byte []) value).Length - dataIndex;
  93                         }
  94
  95                 }
  96
  97                 public char GetChar (int i)
  98                 {
  99                         return (char) GetValue (i);
 100                 }
 101
 102                 public long GetChars (int i, long dataIndex, char[] buffer, int bufferIndex, int length)
 103                 {
 104                         object value = GetValue (i);
 105                         char [] valueBuffer;
 106
 107                         if (value is char[])
 108                                 valueBuffer = (char[])value;
 109                         else if (value is string)
 110                                 valueBuffer = ((string)value).ToCharArray();
 111                         else
 112                                 throw new InvalidCastException ("Type is " + value.GetType ().ToString ());
 113                                                                                                                              if ( buffer == null ) {
 114                                 // Return length of data
 115                                 return valueBuffer.Length;
 116                         }
 117                         else {
 118                                 // Copy data into buffer
 119                                 Array.Copy (valueBuffer, (int) dataIndex, buffer, bufferIndex, length);
 120                                 return valueBuffer.Length - dataIndex;
 121                         }
 122
 123                 }
 124
 125                 public IDataReader GetData (int i)
 126                 {
 127                         return (IDataReader) GetValue (i);
 128                 }
 129
 130                 public string GetDataTypeName (int i)
 131                 {
 132                         return schema[i].DataTypeName;
 133                 }
 134
 135                 public DateTime GetDateTime (int i)
 136                 {
 137                         return (DateTime) GetValue (i);
 138                 }
 139
 140                 public decimal GetDecimal (int i)
 141                 {
 142                         return (decimal) GetValue (i);
 143                 }
 144
 145                 public double GetDouble (int i)
 146                 {
 147                         return (double) GetValue (i);
 148                 }
 149
 150                 public Type GetFieldType (int i)
 151                 {
 152                         return schema[i].FieldType;
 153                 }
 154
 155                 public float GetFloat (int i)
 156                 {
 157                         return (float) GetValue (i);
 158                 }
 159
 160                 public Guid GetGuid (int i)
 161                 {
 162                         return (Guid) GetValue (i);
 163                 }
 164
 165                 public short GetInt16 (int i)
 166                 {
 167                         return (short) GetValue (i);
 168                 }
 169
 170                 public int GetInt32 (int i)
 171                 {
 172                         return (int) GetValue (i);
 173                 }
 174
 175                 public long GetInt64 (int i)
 176                 {
 177                         return (long) GetValue (i);
 178                 }
 179
 180                 public string GetName (int i)
 181                 {
 182                         return (string) lookup [i];
 183                 }
 184
 185 #if NET_1_2
 186                 [MonoTODO]
 187                 public virtual object GetObjectRef (int i)
 188                 {
 189                         throw new NotImplementedException ();
 190                 }
 191 #endif
 192
 193                 public int GetOrdinal (string name)
 194                 {
 195                         return lookup.IndexOf (name);
 196                 }
 197
 198                 public string GetString (int i)
 199                 {
 200                         return (string) GetValue (i);
 201                 }
 202
 203                 public object GetValue (int i)
 204                 {
 205                        if ((i < 0) || (i > fieldCount))
 206                                 throw new IndexOutOfRangeException();
 207
 208                         object value = values [i];
 209                         if (value == null)
 210                                 value = DBNull.Value;
 211                         return value;
 212                 }
 213
 214                 public int GetValues (object[] values)
 215                 {
 216                         if(values == null)
 217                                 throw new ArgumentNullException("values");
 218
 219                         int count = values.Length > this.values.Length ? this.values.Length : values.Length;
 220                         for(int i = 0; i < count; i++)
 221                                 values[i] = this.values[i];
 222
 223                         return count;
 224                 }
 225
 226                 [MonoTODO]
 227                 AttributeCollection ICustomTypeDescriptor.GetAttributes ()
 228                 {
 229                         return new AttributeCollection(null);
 230                 }
 231
 232                 [MonoTODO]
 233                 string ICustomTypeDescriptor.GetClassName ()
 234                 {
 235                         return "";
 236                 }
 237
 238                 [MonoTODO]
 239                 string ICustomTypeDescriptor.GetComponentName ()
 240                 {
 241                         return null;
 242                 }
 243
 244                 [MonoTODO]
 245                 TypeConverter ICustomTypeDescriptor.GetConverter ()
 246                 {
 247                         return null;
 248                 }
 249
 250                 [MonoTODO]
 251                 EventDescriptor ICustomTypeDescriptor.GetDefaultEvent ()
 252                 {
 253                         return null;
 254                 }
 255
 256                 [MonoTODO]
 257                 PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty ()
 258                 {
 259                         return null;
 260                 }
 261
 262                 [MonoTODO]
 263                 object ICustomTypeDescriptor.GetEditor (Type editorBaseType)
 264                 {
 265                         return null;
 266                 }
 267
 268                 [MonoTODO]
 269                 EventDescriptorCollection ICustomTypeDescriptor.GetEvents ()
 270                 {
 271                         return new EventDescriptorCollection(null);
 272                 }
 273
 274                 [MonoTODO]
 275                 EventDescriptorCollection ICustomTypeDescriptor.GetEvents (Attribute[] attributes)
 276                 {
 277                         return new EventDescriptorCollection(null);
 278                 }
 279
 280                 [MonoTODO]
 281                 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties ()
 282                 {
 283                         DataColumnPropertyDescriptor[] descriptors =
 284                                 new DataColumnPropertyDescriptor[FieldCount];
 285
 286                         DataColumnPropertyDescriptor descriptor;
 287                         DataColumn dataColumn;
 288                         for(int col = 0; col < FieldCount; col++) {
 289                                 descriptor = new DataColumnPropertyDescriptor(
 290                                         GetName(col), col, null);
 291                                 descriptor.SetComponentType(typeof(DbDataRecord));
 292                                 descriptor.SetPropertyType(GetFieldType(col));
 293
 294                                 descriptors[col] = descriptor;
 295                         }
 296
 297                         return new PropertyDescriptorCollection (descriptors);
 298                 }
 299
 300                 [MonoTODO]
 301                 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties (Attribute[] attributes)
 302                 {
 303                         PropertyDescriptorCollection descriptors;
 304                         descriptors = ((ICustomTypeDescriptor) this).GetProperties ();
 305                         // TODO: filter out descriptors which do not contain
 306                         //       any of those attributes
 307                         //       except, those descriptors
 308                         //       that contain DefaultMemeberAttribute
 309                         return descriptors;
 310                 }
 311
 312                 [MonoTODO]
 313                 object ICustomTypeDescriptor.GetPropertyOwner (PropertyDescriptor pd)
 314                 {
 315                         return this;
 316                 }
 317
 318                 public bool IsDBNull (int i)
 319                 {
 320                         return GetValue (i) == null;
 321                 }
 322 #if NET_1_2
 323                 public virtual bool IsSetAsDefault (int i)
 324                 {
 325                         throw new NotImplementedException ();
 326                 }
 327
 328                 public void SetSchemaInfo (SchemaInfo[] schemaInfo)
 329                 {
 330                         throw new NotImplementedException ();
 331                 }
 332 #endif
 333
 334                 #endregion // Methods
 335         }
 336 }