mcs/class/corlib/System.Runtime.Remoting.Messaging/ReturnMessage.cs

   1 //
   2 // System.Runtime.Remoting.Messaging.ReturnMessage.cs
   3 //
   4 // Author:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35 using System.Reflection;
  36 using System.IO;
  37
  38 namespace System.Runtime.Remoting.Messaging
  39 {
  40         public class ReturnMessage : IMethodReturnMessage, IMethodMessage, IMessage, IInternalMessage
  41         {
  42                 object[] _outArgs;
  43                 object[] _args;
  44                 int _outArgsCount;
  45                 LogicalCallContext _callCtx;
  46                 object _returnValue;
  47                 string _uri;
  48                 Exception _exception;
  49                 MethodBase _methodBase;
  50                 string _methodName;
  51                 Type [] _methodSignature;
  52                 string _typeName;
  53                 MethodReturnDictionary _properties;
  54                 Identity _targetIdentity;
  55                 ArgInfo _inArgInfo;
  56
  57                 public ReturnMessage (object returnValue, object [] outArgs,
  58                                int outArgCount, LogicalCallContext callCtx,
  59                                IMethodCallMessage request)
  60                 {
  61                         // outArgCount tells how many values of outArgs are valid
  62
  63                         _returnValue = returnValue;
  64                         _args = outArgs;
  65                         _outArgsCount = outArgCount;
  66                         _callCtx = callCtx;
  67                         _uri = request.Uri;
  68                         _methodBase = request.MethodBase;
  69                         if (_args == null) _args = new object [outArgCount];
  70                 }
  71
  72                 public ReturnMessage (Exception exc, IMethodCallMessage request)
  73                 {
  74                         _exception = exc;
  75
  76                         if (request != null)
  77                                 _methodBase = request.MethodBase;
  78                         _args = new object[0];  // .NET does this
  79                 }
  80
  81                 public int ArgCount {
  82                         get {
  83                                 return _args.Length;
  84                         }
  85                 }
  86
  87                 public object [] Args {
  88                         get {
  89                                 return _args;
  90                         }
  91                 }
  92
  93                 public bool HasVarArgs {
  94                         get {
  95                                 return (MethodBase.CallingConvention | CallingConventions.VarArgs) != 0;
  96                         }
  97                 }
  98
  99                 public LogicalCallContext LogicalCallContext {
 100                         get {
 101                                 return _callCtx;
 102                         }
 103                 }
 104
 105                 public MethodBase MethodBase {
 106                         get {
 107                                 return _methodBase;
 108                         }
 109                 }
 110
 111                 public string MethodName {
 112                         get {
 113                                 if (_methodBase != null && _methodName == null)
 114                                         _methodName = _methodBase.Name;
 115                                 return _methodName;
 116                         }
 117                 }
 118
 119                 public object MethodSignature {
 120                         get {
 121                                 if (_methodBase != null && _methodSignature == null) {
 122                                         ParameterInfo[] parameters = _methodBase.GetParameters();
 123                                         _methodSignature = new Type [parameters.Length];
 124                                         for (int n=0; n<parameters.Length; n++)
 125                                                 _methodSignature[n] = parameters[n].ParameterType;
 126                                 }
 127                                 return _methodSignature;
 128                         }
 129                 }
 130
 131                 public virtual IDictionary Properties {
 132                         get {
 133                                 if (_properties == null) _properties = new MethodReturnDictionary (this);
 134                                 return _properties;
 135                         }
 136                 }
 137
 138                 public string TypeName {
 139                         get {
 140
 141                                 // lazily fill in _typeName from _methodBase
 142                                 if (_methodBase != null && _typeName == null)
 143                                         _typeName = _methodBase.DeclaringType.AssemblyQualifiedName;
 144                                 return _typeName;
 145
 146                         }
 147                 }
 148
 149                 public string Uri {
 150                         get {
 151                                 return _uri;
 152                         }
 153
 154                         set {
 155                                 _uri = value;
 156                         }
 157                 }
 158
 159                 public object GetArg (int arg_num)
 160                 {
 161                         return _args [arg_num];
 162                 }
 163
 164                 public string GetArgName (int arg_num)
 165                 {
 166                         return _methodBase.GetParameters()[arg_num].Name;
 167                 }
 168
 169                 public Exception Exception {
 170                         get {
 171                                 return _exception;
 172                         }
 173                 }
 174
 175                 public int OutArgCount {
 176                         get {
 177                                 if (_args == null || _args.Length == 0) return 0;
 178                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 179                                 return _inArgInfo.GetInOutArgCount ();
 180                         }
 181                 }
 182
 183                 public object [] OutArgs {
 184                         get {
 185                                 if (_outArgs == null && _args != null) {
 186                                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 187                                         _outArgs = _inArgInfo.GetInOutArgs (_args);
 188                                 }
 189                                 return _outArgs;
 190                         }
 191                 }
 192
 193                 public virtual object ReturnValue {
 194                         get {
 195                                 return _returnValue;
 196                         }
 197                 }
 198
 199                 public object GetOutArg (int arg_num)
 200                 {
 201                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 202                         return _args[_inArgInfo.GetInOutArgIndex (arg_num)];
 203                 }
 204
 205                 public string GetOutArgName (int arg_num)
 206                 {
 207                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 208                         return _inArgInfo.GetInOutArgName(arg_num);
 209                 }
 210
 211                 Identity IInternalMessage.TargetIdentity
 212                 {
 213                         get { return _targetIdentity; }
 214                         set { _targetIdentity = value; }
 215                 }
 216
 217                 public override string ToString ()
 218                 {
 219                         string s = TypeName.Split(',')[0] + "." + MethodName + " (";
 220                         if (_exception != null)
 221                         {
 222                                 s += "Exception)\n" + _exception;
 223                         }
 224                         else
 225                         {
 226                                 for (int n=0; n<OutArgs.Length; n++)
 227                                 {
 228                                         if (n>0) s+= ", ";
 229                                         if (OutArgs[n] != null) s += OutArgs[n].GetType().Name + " ";
 230                                         s += GetOutArgName (n);
 231                                         if (OutArgs[n] != null) s += " = {" + OutArgs[n] + "}";
 232                                         else s+=" = {null}";
 233                                 }
 234                                 s += ")";
 235                         }
 236                         return s;
 237                 }
 238         }
 239 }