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

   1 // System.Reflection.ParameterInfo
   2 //
   3 // Sean MacIsaac (macisaac@ximian.com)
   4 //
   5 // (C) 2001 Ximian, Inc.
   6
   7 using System.Reflection.Emit;
   8
   9 namespace System.Reflection
  10 {
  11         [Serializable]
  12         public class ParameterInfo : ICustomAttributeProvider
  13         {
  14                 protected Type ClassImpl;
  15                 protected object DefaultValueImpl;
  16                 protected MemberInfo MemberImpl;
  17                 protected string NameImpl;
  18                 protected int PositionImpl;
  19                 protected ParameterAttributes AttrsImpl;
  20
  21                 protected ParameterInfo () {
  22                 }
  23
  24                 internal ParameterInfo (ParameterBuilder pb, Type type, MemberInfo member, int position) {
  25                         this.ClassImpl = type;
  26                         this.MemberImpl = member;
  27                         if (pb != null) {
  28                                 this.NameImpl = pb.Name;
  29                                 this.PositionImpl = pb.Position - 1;    // ParameterInfo.Position is zero-based
  30                                 this.AttrsImpl = (ParameterAttributes) pb.Attributes;
  31                         } else {
  32                                 this.NameImpl = "";
  33                                 this.PositionImpl = position - 1;
  34                                 this.AttrsImpl = ParameterAttributes.None;
  35                         }
  36                 }
  37
  38                 /* to build a ParameterInfo for the return type of a method */
  39                 internal ParameterInfo (Type type, MemberInfo member) {
  40                         this.ClassImpl = type;
  41                         this.MemberImpl = member;
  42                         this.NameImpl = "";
  43                         this.PositionImpl = -1; // since parameter positions are zero-based, return type pos is -1
  44                         this.AttrsImpl = ParameterAttributes.Retval;
  45                 }
  46
  47                 public virtual Type ParameterType {
  48                         get {return ClassImpl;}
  49                 }
  50                 public virtual ParameterAttributes Attributes {
  51                         get {return AttrsImpl;}
  52                 }
  53                 public virtual object DefaultValue {
  54                         get {return DefaultValueImpl;}
  55                 }
  56
  57                 public bool IsIn {
  58                         get {return (AttrsImpl & ParameterAttributes.In) != 0;}
  59                 }
  60
  61                 public bool IsLcid {
  62                         get {return (AttrsImpl & ParameterAttributes.Lcid) != 0;}
  63                 }
  64
  65                 public bool IsOptional {
  66                         get {return (AttrsImpl & ParameterAttributes.Optional) != 0;}
  67                 }
  68
  69                 public bool IsOut {
  70                         get {return (AttrsImpl & ParameterAttributes.Out) != 0;}
  71                 }
  72
  73                 public bool IsRetval {
  74                         get {return (AttrsImpl & ParameterAttributes.Retval) != 0;}
  75                 }
  76
  77                 public virtual MemberInfo Member {
  78                         get {return MemberImpl;}
  79                 }
  80
  81                 public virtual string Name {
  82                         get {return NameImpl;}
  83                 }
  84
  85                 public virtual int Position {
  86                         get {return PositionImpl;}
  87                 }
  88
  89                 public virtual object[] GetCustomAttributes (bool inherit)
  90                 {
  91                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
  92                 }
  93
  94                 public virtual object[] GetCustomAttributes (Type attributeType, bool inherit)
  95                 {
  96                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
  97                 }
  98
  99                 public virtual bool IsDefined( Type attributeType, bool inherit) {
 100                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 101                 }
 102         }
 103 }