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 #if !FULL_AOT_RUNTIME
  35 using System;
  36 using System.Reflection;
  37 using System.Reflection.Emit;
  38 using System.Globalization;
  39 using System.Runtime.CompilerServices;
  40 using System.Runtime.InteropServices;
  41
  42 namespace System.Reflection.Emit {
  43         [ComVisible (true)]
  44         [ComDefaultInterface (typeof (_FieldBuilder))]
  45         [ClassInterface (ClassInterfaceType.None)]
  46         [StructLayout (LayoutKind.Sequential)]
  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                         ((ModuleBuilder) tb.Module).RegisterToken (this, GetToken ().Token);
  80                 }
  81
  82                 public override FieldAttributes Attributes {
  83                         get { return attrs; }
  84                 }
  85
  86                 public override Type DeclaringType {
  87                         get { return typeb; }
  88                 }
  89
  90                 public override RuntimeFieldHandle FieldHandle {
  91                         get {
  92                                 throw CreateNotSupportedException ();
  93                         }
  94                 }
  95
  96                 public override Type FieldType {
  97                         get { return type; }
  98                 }
  99
 100                 public override string Name {
 101                         get { return name; }
 102                 }
 103
 104                 public override Type ReflectedType {
 105                         get { return typeb; }
 106                 }
 107
 108                 public override object[] GetCustomAttributes(bool inherit) {
 109                         /*
 110                          * On MS.NET, this always returns not_supported, but we can't do this
 111                          * since there would be no way to obtain custom attributes of
 112                          * dynamically created ctors.
 113                          */
 114                         if (typeb.is_created)
 115                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 116                         else
 117                                 throw CreateNotSupportedException ();
 118                 }
 119
 120                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
 121                         if (typeb.is_created)
 122                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 123                         else
 124                                 throw CreateNotSupportedException ();
 125                 }
 126
 127                 public FieldToken GetToken() {
 128                         return new FieldToken (MetadataToken);
 129                 }
 130
 131                 public override object GetValue(object obj) {
 132                         throw CreateNotSupportedException ();
 133                 }
 134
 135                 public override bool IsDefined( Type attributeType, bool inherit) {
 136                         throw CreateNotSupportedException ();
 137                 }
 138
 139                 internal override int GetFieldOffset () {
 140                         /* FIXME: */
 141                         return 0;
 142                 }
 143
 144                 internal void SetRVAData (byte[] data) {
 145                         rva_data = (byte[])data.Clone ();
 146                 }
 147
 148                 public void SetConstant( object defaultValue) {
 149                         RejectIfCreated ();
 150
 151                         /*if (defaultValue.GetType() != type)
 152                                 throw new ArgumentException ("Constant doesn't match field type");*/
 153                         def_value = defaultValue;
 154                 }
 155
 156                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 157                         RejectIfCreated ();
 158
 159                         if (customBuilder == null)
 160                                 throw new ArgumentNullException ("customBuilder");
 161
 162                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 163                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 164                                 byte[] data = customBuilder.Data;
 165                                 offset = (int)data [2];
 166                                 offset |= ((int)data [3]) << 8;
 167                                 offset |= ((int)data [4]) << 16;
 168                                 offset |= ((int)data [5]) << 24;
 169                                 return;
 170                         } else if (attrname == "System.NonSerializedAttribute") {
 171                                 attrs |= FieldAttributes.NotSerialized;
 172                                 return;
 173                         } else if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
 174                                 attrs |= FieldAttributes.SpecialName;
 175                                 return;
 176                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 177                                 attrs |= FieldAttributes.HasFieldMarshal;
 178                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 179                                 /* FIXME: check for errors */
 180                                 return;
 181                         }
 182                         if (cattrs != null) {
 183                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 184                                 cattrs.CopyTo (new_array, 0);
 185                                 new_array [cattrs.Length] = customBuilder;
 186                                 cattrs = new_array;
 187                         } else {
 188                                 cattrs = new CustomAttributeBuilder [1];
 189                                 cattrs [0] = customBuilder;
 190                         }
 191                 }
 192
 193                 [ComVisible (true)]
 194                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 195                         RejectIfCreated ();
 196                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 197                 }
 198
 199                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 200                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 201                         RejectIfCreated ();
 202                         marshal_info = unmanagedMarshal;
 203                         attrs |= FieldAttributes.HasFieldMarshal;
 204                 }
 205
 206                 public void SetOffset( int iOffset) {
 207                         RejectIfCreated ();
 208                         if (iOffset < 0)
 209                                 throw new ArgumentException ("Negative field offset is not allowed");
 210                         offset = iOffset;
 211                 }
 212
 213                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 214                         throw CreateNotSupportedException ();
 215                 }
 216
 217                 private Exception CreateNotSupportedException ()
 218                 {
 219                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 220                 }
 221
 222                 private void RejectIfCreated ()
 223                 {
 224                         if (typeb.is_created)
 225                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 226                 }
 227
 228                 internal void ResolveUserTypes () {
 229                         type = TypeBuilder.ResolveUserType (type);
 230                         TypeBuilder.ResolveUserTypes (modReq);
 231                         TypeBuilder.ResolveUserTypes (modOpt);
 232                         if (marshal_info != null)
 233                                 marshal_info.marshaltyperef = TypeBuilder.ResolveUserType (marshal_info.marshaltyperef);
 234                 }
 235
 236                 internal FieldInfo RuntimeResolve () {
 237                         // typeb.CreateType() populates this.handle
 238                         var type_handle = new RuntimeTypeHandle (typeb.CreateType () as RuntimeType);
 239                         return FieldInfo.GetFieldFromHandle (handle, type_handle);
 240                 }
 241
 242                 public override Module Module {
 243                         get {
 244                                 return base.Module;
 245                         }
 246                 }
 247
 248                 void _FieldBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 249                 {
 250                         throw new NotImplementedException ();
 251                 }
 252
 253                 void _FieldBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 254                 {
 255                         throw new NotImplementedException ();
 256                 }
 257
 258                 void _FieldBuilder.GetTypeInfoCount (out uint pcTInfo)
 259                 {
 260                         throw new NotImplementedException ();
 261                 }
 262
 263                 void _FieldBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 264                 {
 265                         throw new NotImplementedException ();
 266                 }
 267         }
 268 }
 269
 270 #endif