mcs/class/corlib/System.Reflection/FieldInfo.cs

   1 //
   2 // System.Reflection.FieldInfo.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28
  29 using System.Diagnostics;
  30 using System.Reflection.Emit;
  31 using System.Globalization;
  32 using System.Runtime.CompilerServices;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Reflection {
  36
  37 #if NET_2_0
  38         [ComVisible (true)]
  39         [ComDefaultInterfaceAttribute (typeof (_FieldInfo))]
  40 #endif
  41         [Serializable]
  42         [ClassInterface(ClassInterfaceType.None)]
  43         public abstract class FieldInfo : MemberInfo, _FieldInfo {
  44
  45                 public abstract FieldAttributes Attributes {get;}
  46                 public abstract RuntimeFieldHandle FieldHandle {get;}
  47
  48                 protected FieldInfo () {}
  49
  50                 public abstract Type FieldType { get; }
  51
  52                 public abstract object GetValue(object obj);
  53
  54                 public override MemberTypes MemberType {
  55                         get { return MemberTypes.Field;}
  56                 }
  57
  58                 public bool IsLiteral
  59                 {
  60                         get {return (Attributes & FieldAttributes.Literal) != 0;}
  61                 }
  62
  63                 public bool IsStatic
  64                 {
  65                         get {return (Attributes & FieldAttributes.Static) != 0;}
  66                 }
  67
  68                 public bool IsInitOnly
  69                 {
  70                         get {return (Attributes & FieldAttributes.InitOnly) != 0;}
  71                 }
  72                 public Boolean IsPublic
  73                 {
  74                         get
  75                         {
  76                                 return (Attributes & FieldAttributes.FieldAccessMask) == FieldAttributes.Public;
  77                         }
  78                 }
  79                 public Boolean IsPrivate
  80                 {
  81                         get
  82                         {
  83                                 return (Attributes & FieldAttributes.FieldAccessMask) == FieldAttributes.Private;
  84                         }
  85                 }
  86                 public Boolean IsFamily
  87                 {
  88                         get
  89                         {
  90                                 return (Attributes & FieldAttributes.FieldAccessMask) == FieldAttributes.Family;
  91                         }
  92                 }
  93                 public Boolean IsAssembly
  94                 {
  95                         get
  96                         {
  97                                 return (Attributes & FieldAttributes.FieldAccessMask) == FieldAttributes.Assembly;
  98                         }
  99                 }
 100                 public Boolean IsFamilyAndAssembly
 101                 {
 102                         get {
 103                                 return (Attributes & FieldAttributes.FieldAccessMask) == FieldAttributes.FamANDAssem;
 104                         }
 105                 }
 106                 public Boolean IsFamilyOrAssembly
 107                 {
 108                         get
 109                         {
 110                                 return (Attributes & FieldAttributes.FieldAccessMask) == FieldAttributes.FamORAssem;
 111                         }
 112                 }
 113                 public Boolean IsPinvokeImpl
 114                 {
 115                         get
 116                         {
 117                                 return (Attributes & FieldAttributes.PinvokeImpl) == FieldAttributes.PinvokeImpl;
 118                         }
 119                 }
 120                 public Boolean IsSpecialName
 121                 {
 122                         get
 123                         {
 124                                 return (Attributes & FieldAttributes.SpecialName) == FieldAttributes.SpecialName;
 125                         }
 126                 }
 127                 public Boolean IsNotSerialized
 128                 {
 129                         get
 130                         {
 131                                 return (Attributes & FieldAttributes.NotSerialized) == FieldAttributes.NotSerialized;
 132                         }
 133                 }
 134
 135                 public abstract void SetValue (object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture);
 136
 137 #if ONLY_1_1
 138                 public new Type GetType ()
 139                 {
 140                         return base.GetType ();
 141                 }
 142 #endif
 143
 144                 [DebuggerHidden]
 145                 [DebuggerStepThrough]
 146                 public void SetValue (object obj, object value)
 147                 {
 148                         SetValue (obj, value, 0, null, null);
 149                 }
 150
 151                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 152                 private static extern FieldInfo internal_from_handle (IntPtr handle);
 153
 154                 public static FieldInfo GetFieldFromHandle (RuntimeFieldHandle handle)
 155                 {
 156                         return internal_from_handle (handle.Value);
 157                 }
 158
 159                 //
 160                 // Note: making this abstract imposes an implementation requirement
 161                 //       on any class that derives from it.  However, since it's also
 162                 //       internal, that means only classes inside corlib can derive
 163                 //       from FieldInfo.  See
 164                 //
 165                 //          errors/cs0534-4.cs errors/CS0534-4-lib.cs
 166                 //
 167                 //          class/Microsoft.JScript/Microsoft.JScript/JSFieldInfo.cs
 168                 //
 169                 internal virtual int GetFieldOffset ()
 170                 {
 171                         throw new SystemException ("This method should not be called");
 172                 }
 173
 174                 [CLSCompliant(false)]
 175                 [MonoTODO]
 176                 public virtual object GetValueDirect (TypedReference obj)
 177                 {
 178                         throw new NotImplementedException ();
 179                 }
 180
 181                 [CLSCompliant(false)]
 182                 [MonoTODO]
 183                 public virtual void SetValueDirect (TypedReference obj, object value)
 184                 {
 185                         throw new NotImplementedException ();
 186                 }
 187
 188                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 189                 private extern UnmanagedMarshal GetUnmanagedMarshal ();
 190
 191                 internal virtual UnmanagedMarshal UMarshal {
 192                         get {
 193                                 return GetUnmanagedMarshal ();
 194                         }
 195                 }
 196
 197                 internal object[] GetPseudoCustomAttributes ()
 198                 {
 199                         int count = 0;
 200
 201                         if (IsNotSerialized)
 202                                 count ++;
 203
 204                         if (DeclaringType.IsExplicitLayout)
 205                                 count ++;
 206
 207                         UnmanagedMarshal marshalAs = UMarshal;
 208                         if (marshalAs != null)
 209                                 count ++;
 210
 211                         if (count == 0)
 212                                 return null;
 213                         object[] attrs = new object [count];
 214                         count = 0;
 215
 216                         if (IsNotSerialized)
 217                                 attrs [count ++] = new NonSerializedAttribute ();
 218                         if (DeclaringType.IsExplicitLayout)
 219                                 attrs [count ++] = new FieldOffsetAttribute (GetFieldOffset ());
 220                         if (marshalAs != null)
 221                                 attrs [count ++] = marshalAs.ToMarshalAsAttribute ();
 222
 223                         return attrs;
 224                 }
 225
 226 #if NET_2_0 || BOOTSTRAP_NET_2_0
 227                 [MonoTODO]
 228                 public virtual Type[] GetOptionalCustomModifiers () {
 229                         throw new NotImplementedException ();
 230                 }
 231
 232                 [MonoTODO]
 233                 public virtual Type[] GetRequiredCustomModifiers () {
 234                         throw new NotImplementedException ();
 235                 }
 236
 237                 public virtual object GetRawConstantValue ()
 238                 {
 239                         throw new NotSupportedException ("This non-CLS method is not implemented.");
 240                 }
 241 #endif
 242
 243                 void _FieldInfo.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 244                 {
 245                         throw new NotImplementedException ();
 246                 }
 247
 248                 void _FieldInfo.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 249                 {
 250                         throw new NotImplementedException ();
 251                 }
 252
 253                 void _FieldInfo.GetTypeInfoCount (out uint pcTInfo)
 254                 {
 255                         throw new NotImplementedException ();
 256                 }
 257
 258                 void _FieldInfo.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 259                 {
 260                         throw new NotImplementedException ();
 261                 }
 262         }
 263 }