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         public sealed class FieldBuilder : FieldInfo {
  43                 private FieldAttributes attrs;
  44                 private Type type;
  45                 private String name;
  46                 private object def_value;
  47                 private int offset;
  48                 private int table_idx;
  49                 internal TypeBuilder typeb;
  50                 private byte[] rva_data;
  51                 private CustomAttributeBuilder[] cattrs;
  52                 private UnmanagedMarshal marshal_info;
  53                 private RuntimeFieldHandle handle;
  54                 private Type[] modReq;
  55                 private Type[] modOpt;
  56
  57                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt) {
  58                         attrs = attributes;
  59                         name = fieldName;
  60                         this.type = type;
  61                         this.modReq = modReq;
  62                         this.modOpt = modOpt;
  63                         offset = -1;
  64                         typeb = tb;
  65                         table_idx = tb.get_next_table_index (this, 0x04, true);
  66                 }
  67
  68                 public override FieldAttributes Attributes {
  69                         get { return attrs; }
  70                 }
  71
  72                 public override Type DeclaringType {
  73                         get { return typeb; }
  74                 }
  75
  76                 public override RuntimeFieldHandle FieldHandle {
  77                         get {
  78                                 throw CreateNotSupportedException ();
  79                         }
  80                 }
  81
  82                 public override Type FieldType {
  83                         get { return type; }
  84                 }
  85
  86                 public override string Name {
  87                         get { return name; }
  88                 }
  89
  90                 public override Type ReflectedType {
  91                         get { return typeb; }
  92                 }
  93
  94                 public override object[] GetCustomAttributes(bool inherit) {
  95                         throw CreateNotSupportedException ();
  96                 }
  97
  98                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
  99                         throw CreateNotSupportedException ();
 100                 }
 101
 102                 public FieldToken GetToken() {
 103                         return new FieldToken (0x04000000 | table_idx);
 104                 }
 105
 106                 public override object GetValue(object obj) {
 107                         throw CreateNotSupportedException ();
 108                 }
 109
 110                 public override bool IsDefined( Type attributeType, bool inherit) {
 111                         throw CreateNotSupportedException ();
 112                 }
 113
 114                 internal void SetRVAData (byte[] data) {
 115                         rva_data = (byte[])data.Clone ();
 116                 }
 117
 118                 public void SetConstant( object defaultValue) {
 119                         RejectIfCreated ();
 120
 121                         /*if (defaultValue.GetType() != type)
 122                                 throw new ArgumentException ("Constant doesn't match field type");*/
 123                         def_value = defaultValue;
 124                 }
 125
 126                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 127                         RejectIfCreated ();
 128
 129                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 130                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 131                                 byte[] data = customBuilder.Data;
 132                                 offset = (int)data [2];
 133                                 offset |= ((int)data [3]) << 8;
 134                                 offset |= ((int)data [4]) << 16;
 135                                 offset |= ((int)data [5]) << 24;
 136                                 return;
 137                         } else if (attrname == "System.NonSerializedAttribute") {
 138                                 attrs |= FieldAttributes.NotSerialized;
 139                                 return;
 140                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 141                                 attrs |= FieldAttributes.HasFieldMarshal;
 142                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 143                                 /* FIXME: check for errors */
 144                                 return;
 145                         }
 146                         if (cattrs != null) {
 147                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 148                                 cattrs.CopyTo (new_array, 0);
 149                                 new_array [cattrs.Length] = customBuilder;
 150                                 cattrs = new_array;
 151                         } else {
 152                                 cattrs = new CustomAttributeBuilder [1];
 153                                 cattrs [0] = customBuilder;
 154                         }
 155                 }
 156
 157                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 158                         RejectIfCreated ();
 159                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 160                 }
 161
 162                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 163                         RejectIfCreated ();
 164                         marshal_info = unmanagedMarshal;
 165                         attrs |= FieldAttributes.HasFieldMarshal;
 166                 }
 167
 168                 public void SetOffset( int iOffset) {
 169                         RejectIfCreated ();
 170                         offset = iOffset;
 171                 }
 172
 173                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 174                         throw CreateNotSupportedException ();
 175                 }
 176
 177                 private Exception CreateNotSupportedException ()
 178                 {
 179                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 180                 }
 181
 182                 private void RejectIfCreated ()
 183                 {
 184                         if (typeb.is_created)
 185                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 186                 }
 187
 188 #if NET_2_0 || BOOTSTRAP_NET_2_0
 189                 public override FieldInfo Mono_GetGenericFieldDefinition ()
 190                 {
 191                         return this;
 192                 }
 193 #endif
 194         }
 195 }
 196