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         [ComVisible (true)]
  43         [ComDefaultInterface (typeof (_FieldBuilder))]
  44         [ClassInterface (ClassInterfaceType.None)]
  45         [StructLayout (LayoutKind.Sequential)]
  46         public sealed class FieldBuilder : FieldInfo, _FieldBuilder {
  47
  48 #pragma warning disable 169, 414
  49                 private FieldAttributes attrs;
  50                 private Type type;
  51                 private String name;
  52                 private object def_value;
  53                 private int offset;
  54                 private int table_idx;
  55                 internal TypeBuilder typeb;
  56                 private byte[] rva_data;
  57                 private CustomAttributeBuilder[] cattrs;
  58                 private UnmanagedMarshal marshal_info;
  59                 private RuntimeFieldHandle handle;
  60                 private Type[] modReq;
  61                 private Type[] modOpt;
  62 #pragma warning restore 169, 414
  63
  64                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt)
  65                 {
  66                         if (type == null)
  67                                 throw new ArgumentNullException ("type");
  68
  69                         attrs = attributes;
  70                         name = fieldName;
  71                         this.type = type;
  72                         this.modReq = modReq;
  73                         this.modOpt = modOpt;
  74                         offset = -1;
  75                         typeb = tb;
  76                         table_idx = tb.get_next_table_index (this, 0x04, true);
  77
  78                         ((ModuleBuilder) tb.Module).RegisterToken (this, GetToken ().Token);
  79                 }
  80
  81                 public override FieldAttributes Attributes {
  82                         get { return attrs; }
  83                 }
  84
  85                 public override Type DeclaringType {
  86                         get { return typeb; }
  87                 }
  88
  89                 public override RuntimeFieldHandle FieldHandle {
  90                         get {
  91                                 throw CreateNotSupportedException ();
  92                         }
  93                 }
  94
  95                 public override Type FieldType {
  96                         get { return type; }
  97                 }
  98
  99                 public override string Name {
 100                         get { return name; }
 101                 }
 102
 103                 public override Type ReflectedType {
 104                         get { return typeb; }
 105                 }
 106
 107                 public override object[] GetCustomAttributes(bool inherit) {
 108                         /*
 109                          * On MS.NET, this always returns not_supported, but we can't do this
 110                          * since there would be no way to obtain custom attributes of
 111                          * dynamically created ctors.
 112                          */
 113                         if (typeb.is_created)
 114                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 115                         else
 116                                 throw CreateNotSupportedException ();
 117                 }
 118
 119                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
 120                         if (typeb.is_created)
 121                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 122                         else
 123                                 throw CreateNotSupportedException ();
 124                 }
 125
 126                 public FieldToken GetToken() {
 127                         return new FieldToken (MetadataToken);
 128                 }
 129
 130                 public override object GetValue(object obj) {
 131                         throw CreateNotSupportedException ();
 132                 }
 133
 134                 public override bool IsDefined( Type attributeType, bool inherit) {
 135                         throw CreateNotSupportedException ();
 136                 }
 137
 138                 internal override int GetFieldOffset () {
 139                         /* FIXME: */
 140                         return 0;
 141                 }
 142
 143                 internal void SetRVAData (byte[] data) {
 144                         rva_data = (byte[])data.Clone ();
 145                 }
 146
 147                 public void SetConstant( object defaultValue) {
 148                         RejectIfCreated ();
 149
 150                         /*if (defaultValue.GetType() != type)
 151                                 throw new ArgumentException ("Constant doesn't match field type");*/
 152                         def_value = defaultValue;
 153                 }
 154
 155                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 156                         RejectIfCreated ();
 157
 158                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 159                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 160                                 byte[] data = customBuilder.Data;
 161                                 offset = (int)data [2];
 162                                 offset |= ((int)data [3]) << 8;
 163                                 offset |= ((int)data [4]) << 16;
 164                                 offset |= ((int)data [5]) << 24;
 165                                 return;
 166                         } else if (attrname == "System.NonSerializedAttribute") {
 167                                 attrs |= FieldAttributes.NotSerialized;
 168                                 return;
 169                         } else if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
 170                                 attrs |= FieldAttributes.SpecialName;
 171                                 return;
 172                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 173                                 attrs |= FieldAttributes.HasFieldMarshal;
 174                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 175                                 /* FIXME: check for errors */
 176                                 return;
 177                         }
 178                         if (cattrs != null) {
 179                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 180                                 cattrs.CopyTo (new_array, 0);
 181                                 new_array [cattrs.Length] = customBuilder;
 182                                 cattrs = new_array;
 183                         } else {
 184                                 cattrs = new CustomAttributeBuilder [1];
 185                                 cattrs [0] = customBuilder;
 186                         }
 187                 }
 188
 189                 [ComVisible (true)]
 190                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 191                         RejectIfCreated ();
 192                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 193                 }
 194
 195                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 196                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 197                         RejectIfCreated ();
 198                         marshal_info = unmanagedMarshal;
 199                         attrs |= FieldAttributes.HasFieldMarshal;
 200                 }
 201
 202                 public void SetOffset( int iOffset) {
 203                         RejectIfCreated ();
 204                         offset = iOffset;
 205                 }
 206
 207                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 208                         throw CreateNotSupportedException ();
 209                 }
 210
 211                 private Exception CreateNotSupportedException ()
 212                 {
 213                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 214                 }
 215
 216                 private void RejectIfCreated ()
 217                 {
 218                         if (typeb.is_created)
 219                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 220                 }
 221
 222                 public override Module Module {
 223                         get {
 224                                 return base.Module;
 225                         }
 226                 }
 227
 228                 void _FieldBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 229                 {
 230                         throw new NotImplementedException ();
 231                 }
 232
 233                 void _FieldBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 234                 {
 235                         throw new NotImplementedException ();
 236                 }
 237
 238                 void _FieldBuilder.GetTypeInfoCount (out uint pcTInfo)
 239                 {
 240                         throw new NotImplementedException ();
 241                 }
 242
 243                 void _FieldBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 244                 {
 245                         throw new NotImplementedException ();
 246                 }
 247         }
 248 }
 249