mcs/class/corlib/System.Reflection.Emit/FieldBuilder.cs

   1
   2 //
   3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 //
  26 // System.Reflection.Emit/FieldBuilder.cs
  27 //
  28 // Author:
  29 //   Paolo Molaro (lupus@ximian.com)
  30 //
  31 // (C) 2001-2002 Ximian, Inc.  http://www.ximian.com
  32 //
  33
  34 using System;
  35 using System.Reflection;
  36 using System.Reflection.Emit;
  37 using System.Globalization;
  38 using System.Runtime.CompilerServices;
  39 using System.Runtime.InteropServices;
  40
  41 namespace System.Reflection.Emit {
  42 #if NET_2_0
  43         [ComVisible (true)]
  44         [ComDefaultInterface (typeof (_FieldBuilder))]
  45 #endif
  46         [ClassInterface (ClassInterfaceType.None)]
  47         public sealed class FieldBuilder : FieldInfo, _FieldBuilder {
  48
  49 #pragma warning disable 169, 414
  50                 private FieldAttributes attrs;
  51                 private Type type;
  52                 private String name;
  53                 private object def_value;
  54                 private int offset;
  55                 private int table_idx;
  56                 internal TypeBuilder typeb;
  57                 private byte[] rva_data;
  58                 private CustomAttributeBuilder[] cattrs;
  59                 private UnmanagedMarshal marshal_info;
  60                 private RuntimeFieldHandle handle;
  61                 private Type[] modReq;
  62                 private Type[] modOpt;
  63 #pragma warning restore 169, 414
  64
  65                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt)
  66                 {
  67                         if (type == null)
  68                                 throw new ArgumentNullException ("type");
  69
  70                         attrs = attributes;
  71                         name = fieldName;
  72                         this.type = type;
  73                         this.modReq = modReq;
  74                         this.modOpt = modOpt;
  75                         offset = -1;
  76                         typeb = tb;
  77                         table_idx = tb.get_next_table_index (this, 0x04, true);
  78                 }
  79
  80                 public override FieldAttributes Attributes {
  81                         get { return attrs; }
  82                 }
  83
  84                 public override Type DeclaringType {
  85                         get { return typeb; }
  86                 }
  87
  88                 public override RuntimeFieldHandle FieldHandle {
  89                         get {
  90                                 throw CreateNotSupportedException ();
  91                         }
  92                 }
  93
  94                 public override Type FieldType {
  95                         get { return type; }
  96                 }
  97
  98                 public override string Name {
  99                         get { return name; }
 100                 }
 101
 102                 public override Type ReflectedType {
 103                         get { return typeb; }
 104                 }
 105
 106                 public override object[] GetCustomAttributes(bool inherit) {
 107                         /*
 108                          * On MS.NET, this always returns not_supported, but we can't do this
 109                          * since there would be no way to obtain custom attributes of
 110                          * dynamically created ctors.
 111                          */
 112                         if (typeb.is_created)
 113                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 114                         else
 115                                 throw CreateNotSupportedException ();
 116                 }
 117
 118                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
 119                         if (typeb.is_created)
 120                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 121                         else
 122                                 throw CreateNotSupportedException ();
 123                 }
 124
 125                 public FieldToken GetToken() {
 126                         return new FieldToken (MetadataToken);
 127                 }
 128
 129                 public override object GetValue(object obj) {
 130                         throw CreateNotSupportedException ();
 131                 }
 132
 133                 public override bool IsDefined( Type attributeType, bool inherit) {
 134                         throw CreateNotSupportedException ();
 135                 }
 136
 137                 internal override int GetFieldOffset () {
 138                         /* FIXME: */
 139                         return 0;
 140                 }
 141
 142                 internal void SetRVAData (byte[] data) {
 143                         rva_data = (byte[])data.Clone ();
 144                 }
 145
 146                 public void SetConstant( object defaultValue) {
 147                         RejectIfCreated ();
 148
 149                         /*if (defaultValue.GetType() != type)
 150                                 throw new ArgumentException ("Constant doesn't match field type");*/
 151                         def_value = defaultValue;
 152                 }
 153
 154                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 155                         RejectIfCreated ();
 156
 157                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 158                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 159                                 byte[] data = customBuilder.Data;
 160                                 offset = (int)data [2];
 161                                 offset |= ((int)data [3]) << 8;
 162                                 offset |= ((int)data [4]) << 16;
 163                                 offset |= ((int)data [5]) << 24;
 164                                 return;
 165                         } else if (attrname == "System.NonSerializedAttribute") {
 166                                 attrs |= FieldAttributes.NotSerialized;
 167                                 return;
 168 #if NET_2_0
 169                         } else if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
 170                                 attrs |= FieldAttributes.SpecialName;
 171                                 return;
 172 #endif
 173                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 174                                 attrs |= FieldAttributes.HasFieldMarshal;
 175                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 176                                 /* FIXME: check for errors */
 177                                 return;
 178                         }
 179                         if (cattrs != null) {
 180                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 181                                 cattrs.CopyTo (new_array, 0);
 182                                 new_array [cattrs.Length] = customBuilder;
 183                                 cattrs = new_array;
 184                         } else {
 185                                 cattrs = new CustomAttributeBuilder [1];
 186                                 cattrs [0] = customBuilder;
 187                         }
 188                 }
 189
 190 #if NET_2_0
 191                 [ComVisible (true)]
 192 #endif
 193                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 194                         RejectIfCreated ();
 195                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 196                 }
 197
 198 #if NET_2_0
 199                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 200 #endif
 201                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 202                         RejectIfCreated ();
 203                         marshal_info = unmanagedMarshal;
 204                         attrs |= FieldAttributes.HasFieldMarshal;
 205                 }
 206
 207                 public void SetOffset( int iOffset) {
 208                         RejectIfCreated ();
 209                         offset = iOffset;
 210                 }
 211
 212                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 213                         throw CreateNotSupportedException ();
 214                 }
 215
 216                 internal override UnmanagedMarshal UMarshal {
 217                         get {
 218                                 return marshal_info;
 219                         }
 220                 }
 221
 222                 private Exception CreateNotSupportedException ()
 223                 {
 224                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 225                 }
 226
 227                 private void RejectIfCreated ()
 228                 {
 229                         if (typeb.is_created)
 230                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 231                 }
 232
 233 #if NET_2_0 || BOOTSTRAP_NET_2_0
 234                 public override Module Module {
 235                         get {
 236                                 return base.Module;
 237                         }
 238                 }
 239 #endif
 240
 241                 void _FieldBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 242                 {
 243                         throw new NotImplementedException ();
 244                 }
 245
 246                 void _FieldBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 247                 {
 248                         throw new NotImplementedException ();
 249                 }
 250
 251                 void _FieldBuilder.GetTypeInfoCount (out uint pcTInfo)
 252                 {
 253                         throw new NotImplementedException ();
 254                 }
 255
 256                 void _FieldBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 257                 {
 258                         throw new NotImplementedException ();
 259                 }
 260         }
 261 }
 262