shared source/sscli20/jscript/engine/jswrappedfield.cs

   1 // ==++==
   2 //
   3 //
   4 //    Copyright (c) 2006 Microsoft Corporation.  All rights reserved.
   5 //
   6 //    The use and distribution terms for this software are contained in the file
   7 //    named license.txt, which can be found in the root of this distribution.
   8 //    By using this software in any fashion, you are agreeing to be bound by the
   9 //    terms of this license.
  10 //
  11 //    You must not remove this notice, or any other, from this software.
  12 //
  13 //
  14 // ==--==
  15
  16 /*
  17 This class allows JSObjects to return fields that are not their own, as if they were. Think of it as a field "delegate".
  18 */
  19
  20
  21 namespace Microsoft.JScript {
  22
  23     using System;
  24     using System.Globalization;
  25     using System.Reflection;
  26
  27     internal sealed class JSWrappedField : JSField, IWrappedMember{
  28       internal FieldInfo wrappedField;
  29       internal Object wrappedObject;
  30
  31       internal JSWrappedField(FieldInfo field, Object obj){
  32         if (field is JSFieldInfo) field = ((JSFieldInfo)field).field;
  33         this.wrappedField = field;
  34         this.wrappedObject = obj;
  35         if (obj is JSObject && !Typeob.JSObject.IsAssignableFrom(field.DeclaringType))
  36           if (obj is BooleanObject) this.wrappedObject = ((BooleanObject)obj).value;
  37           else if (obj is NumberObject) this.wrappedObject = ((NumberObject)obj).value;
  38           else if (obj is StringObject) this.wrappedObject = ((StringObject)obj).value;
  39       }
  40
  41       public override String Name{
  42         get{
  43           return this.wrappedField.Name;
  44         }
  45       }
  46
  47       public override FieldAttributes Attributes{
  48         get{
  49           return this.wrappedField.Attributes;
  50         }
  51       }
  52
  53       public override Type DeclaringType{
  54         get{
  55           return this.wrappedField.DeclaringType;
  56         }
  57       }
  58
  59       public override Type FieldType{
  60         get{
  61           return this.wrappedField.FieldType;
  62         }
  63       }
  64
  65       internal override String GetClassFullName(){
  66         if (this.wrappedField is JSField)
  67           return ((JSField)this.wrappedField).GetClassFullName();
  68         else
  69           return this.wrappedField.DeclaringType.FullName;
  70       }
  71
  72       internal override Object GetMetaData(){
  73         if (this.wrappedField is JSField)
  74           return ((JSField)this.wrappedField).GetMetaData();
  75         else
  76           return this.wrappedField;
  77       }
  78
  79       internal override PackageScope GetPackage(){
  80         if (this.wrappedField is JSField){
  81           return ((JSField)this.wrappedField).GetPackage();
  82         }
  83         return null;
  84       }
  85
  86       public override Object GetValue(Object obj){
  87         return this.wrappedField.GetValue(this.wrappedObject);
  88       }
  89
  90       public Object GetWrappedObject(){
  91         return this.wrappedObject;
  92       }
  93
  94       public override void SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, CultureInfo locale){
  95         this.wrappedField.SetValue(this.wrappedObject, value, invokeAttr, binder, locale);
  96       }
  97     }
  98 }