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                 private FieldAttributes attrs;
  49                 private Type type;
  50                 private String name;
  51                 private object def_value;
  52                 private int offset;
  53                 private int table_idx;
  54                 internal TypeBuilder typeb;
  55                 private byte[] rva_data;
  56                 private CustomAttributeBuilder[] cattrs;
  57                 private UnmanagedMarshal marshal_info;
  58                 private RuntimeFieldHandle handle;
  59                 private Type[] modReq;
  60                 private Type[] modOpt;
  61
  62                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt) {
  63                         attrs = attributes;
  64                         name = fieldName;
  65                         this.type = type;
  66                         this.modReq = modReq;
  67                         this.modOpt = modOpt;
  68                         offset = -1;
  69                         typeb = tb;
  70                         table_idx = tb.get_next_table_index (this, 0x04, true);
  71                 }
  72
  73                 public override FieldAttributes Attributes {
  74                         get { return attrs; }
  75                 }
  76
  77                 public override Type DeclaringType {
  78                         get { return typeb; }
  79                 }
  80
  81                 public override RuntimeFieldHandle FieldHandle {
  82                         get {
  83                                 throw CreateNotSupportedException ();
  84                         }
  85                 }
  86
  87                 public override Type FieldType {
  88                         get { return type; }
  89                 }
  90
  91                 public override string Name {
  92                         get { return name; }
  93                 }
  94
  95                 public override Type ReflectedType {
  96                         get { return typeb; }
  97                 }
  98
  99                 public override object[] GetCustomAttributes(bool inherit) {
 100                         /*
 101                          * On MS.NET, this always returns not_supported, but we can't do this
 102                          * since there would be no way to obtain custom attributes of
 103                          * dynamically created ctors.
 104                          */
 105                         if (typeb.is_created)
 106                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 107                         else
 108                                 throw CreateNotSupportedException ();
 109                 }
 110
 111                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
 112                         if (typeb.is_created)
 113                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 114                         else
 115                                 throw CreateNotSupportedException ();
 116                 }
 117
 118                 public FieldToken GetToken() {
 119                         return new FieldToken (0x04000000 | table_idx);
 120                 }
 121
 122                 public override object GetValue(object obj) {
 123                         throw CreateNotSupportedException ();
 124                 }
 125
 126                 public override bool IsDefined( Type attributeType, bool inherit) {
 127                         throw CreateNotSupportedException ();
 128                 }
 129
 130                 internal override int GetFieldOffset () {
 131                         /* FIXME: */
 132                         return 0;
 133                 }
 134
 135                 internal void SetRVAData (byte[] data) {
 136                         rva_data = (byte[])data.Clone ();
 137                 }
 138
 139                 public void SetConstant( object defaultValue) {
 140                         RejectIfCreated ();
 141
 142                         /*if (defaultValue.GetType() != type)
 143                                 throw new ArgumentException ("Constant doesn't match field type");*/
 144                         def_value = defaultValue;
 145                 }
 146
 147                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 148                         RejectIfCreated ();
 149
 150                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 151                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 152                                 byte[] data = customBuilder.Data;
 153                                 offset = (int)data [2];
 154                                 offset |= ((int)data [3]) << 8;
 155                                 offset |= ((int)data [4]) << 16;
 156                                 offset |= ((int)data [5]) << 24;
 157                                 return;
 158                         } else if (attrname == "System.NonSerializedAttribute") {
 159                                 attrs |= FieldAttributes.NotSerialized;
 160                                 return;
 161 #if NET_2_0
 162                         } else if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
 163                                 attrs |= FieldAttributes.SpecialName;
 164                                 return;
 165 #endif
 166                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 167                                 attrs |= FieldAttributes.HasFieldMarshal;
 168                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 169                                 /* FIXME: check for errors */
 170                                 return;
 171                         }
 172                         if (cattrs != null) {
 173                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 174                                 cattrs.CopyTo (new_array, 0);
 175                                 new_array [cattrs.Length] = customBuilder;
 176                                 cattrs = new_array;
 177                         } else {
 178                                 cattrs = new CustomAttributeBuilder [1];
 179                                 cattrs [0] = customBuilder;
 180                         }
 181                 }
 182
 183 #if NET_2_0
 184                 [ComVisible (true)]
 185 #endif
 186                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 187                         RejectIfCreated ();
 188                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 189                 }
 190
 191 #if NET_2_0
 192                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 193 #endif
 194                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 195                         RejectIfCreated ();
 196                         marshal_info = unmanagedMarshal;
 197                         attrs |= FieldAttributes.HasFieldMarshal;
 198                 }
 199
 200                 public void SetOffset( int iOffset) {
 201                         RejectIfCreated ();
 202                         offset = iOffset;
 203                 }
 204
 205                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 206                         throw CreateNotSupportedException ();
 207                 }
 208
 209                 internal override UnmanagedMarshal UMarshal {
 210                         get {
 211                                 return marshal_info;
 212                         }
 213                 }
 214
 215                 private Exception CreateNotSupportedException ()
 216                 {
 217                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 218                 }
 219
 220                 private void RejectIfCreated ()
 221                 {
 222                         if (typeb.is_created)
 223                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 224                 }
 225
 226 #if NET_2_0 || BOOTSTRAP_NET_2_0
 227                 public override Module Module {
 228                         get {
 229                                 return base.Module;
 230                         }
 231                 }
 232 #endif
 233
 234                 void _FieldBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 235                 {
 236                         throw new NotImplementedException ();
 237                 }
 238
 239                 void _FieldBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 240                 {
 241                         throw new NotImplementedException ();
 242                 }
 243
 244                 void _FieldBuilder.GetTypeInfoCount (out uint pcTInfo)
 245                 {
 246                         throw new NotImplementedException ();
 247                 }
 248
 249                 void _FieldBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 250                 {
 251                         throw new NotImplementedException ();
 252                 }
 253         }
 254 }
 255