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         public sealed class FieldBuilder : FieldInfo, _FieldBuilder {
  46
  47 #pragma warning disable 169, 414
  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 #pragma warning restore 169, 414
  62
  63                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt)
  64                 {
  65                         if (type == null)
  66                                 throw new ArgumentNullException ("type");
  67
  68                         attrs = attributes;
  69                         name = fieldName;
  70                         this.type = type;
  71                         this.modReq = modReq;
  72                         this.modOpt = modOpt;
  73                         offset = -1;
  74                         typeb = tb;
  75                         table_idx = tb.get_next_table_index (this, 0x04, true);
  76                 }
  77
  78                 public override FieldAttributes Attributes {
  79                         get { return attrs; }
  80                 }
  81
  82                 public override Type DeclaringType {
  83                         get { return typeb; }
  84                 }
  85
  86                 public override RuntimeFieldHandle FieldHandle {
  87                         get {
  88                                 throw CreateNotSupportedException ();
  89                         }
  90                 }
  91
  92                 public override Type FieldType {
  93                         get { return type; }
  94                 }
  95
  96                 public override string Name {
  97                         get { return name; }
  98                 }
  99
 100                 public override Type ReflectedType {
 101                         get { return typeb; }
 102                 }
 103
 104                 public override object[] GetCustomAttributes(bool inherit) {
 105                         /*
 106                          * On MS.NET, this always returns not_supported, but we can't do this
 107                          * since there would be no way to obtain custom attributes of
 108                          * dynamically created ctors.
 109                          */
 110                         if (typeb.is_created)
 111                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 112                         else
 113                                 throw CreateNotSupportedException ();
 114                 }
 115
 116                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
 117                         if (typeb.is_created)
 118                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 119                         else
 120                                 throw CreateNotSupportedException ();
 121                 }
 122
 123                 public FieldToken GetToken() {
 124                         return new FieldToken (MetadataToken);
 125                 }
 126
 127                 public override object GetValue(object obj) {
 128                         throw CreateNotSupportedException ();
 129                 }
 130
 131                 public override bool IsDefined( Type attributeType, bool inherit) {
 132                         throw CreateNotSupportedException ();
 133                 }
 134
 135                 internal override int GetFieldOffset () {
 136                         /* FIXME: */
 137                         return 0;
 138                 }
 139
 140                 internal void SetRVAData (byte[] data) {
 141                         rva_data = (byte[])data.Clone ();
 142                 }
 143
 144                 public void SetConstant( object defaultValue) {
 145                         RejectIfCreated ();
 146
 147                         /*if (defaultValue.GetType() != type)
 148                                 throw new ArgumentException ("Constant doesn't match field type");*/
 149                         def_value = defaultValue;
 150                 }
 151
 152                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 153                         RejectIfCreated ();
 154
 155                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 156                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 157                                 byte[] data = customBuilder.Data;
 158                                 offset = (int)data [2];
 159                                 offset |= ((int)data [3]) << 8;
 160                                 offset |= ((int)data [4]) << 16;
 161                                 offset |= ((int)data [5]) << 24;
 162                                 return;
 163                         } else if (attrname == "System.NonSerializedAttribute") {
 164                                 attrs |= FieldAttributes.NotSerialized;
 165                                 return;
 166                         } else if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
 167                                 attrs |= FieldAttributes.SpecialName;
 168                                 return;
 169                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 170                                 attrs |= FieldAttributes.HasFieldMarshal;
 171                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 172                                 /* FIXME: check for errors */
 173                                 return;
 174                         }
 175                         if (cattrs != null) {
 176                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 177                                 cattrs.CopyTo (new_array, 0);
 178                                 new_array [cattrs.Length] = customBuilder;
 179                                 cattrs = new_array;
 180                         } else {
 181                                 cattrs = new CustomAttributeBuilder [1];
 182                                 cattrs [0] = customBuilder;
 183                         }
 184                 }
 185
 186                 [ComVisible (true)]
 187                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 188                         RejectIfCreated ();
 189                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 190                 }
 191
 192                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 193                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 194                         RejectIfCreated ();
 195                         marshal_info = unmanagedMarshal;
 196                         attrs |= FieldAttributes.HasFieldMarshal;
 197                 }
 198
 199                 public void SetOffset( int iOffset) {
 200                         RejectIfCreated ();
 201                         offset = iOffset;
 202                 }
 203
 204                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 205                         throw CreateNotSupportedException ();
 206                 }
 207
 208                 internal override UnmanagedMarshal UMarshal {
 209                         get {
 210                                 return marshal_info;
 211                         }
 212                 }
 213
 214                 private Exception CreateNotSupportedException ()
 215                 {
 216                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 217                 }
 218
 219                 private void RejectIfCreated ()
 220                 {
 221                         if (typeb.is_created)
 222                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 223                 }
 224
 225                 public override Module Module {
 226                         get {
 227                                 return base.Module;
 228                         }
 229                 }
 230
 231                 void _FieldBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 232                 {
 233                         throw new NotImplementedException ();
 234                 }
 235
 236                 void _FieldBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 237                 {
 238                         throw new NotImplementedException ();
 239                 }
 240
 241                 void _FieldBuilder.GetTypeInfoCount (out uint pcTInfo)
 242                 {
 243                         throw new NotImplementedException ();
 244                 }
 245
 246                 void _FieldBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 247                 {
 248                         throw new NotImplementedException ();
 249                 }
 250         }
 251 }
 252