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                         if (request != null) {
  68                                 _uri = request.Uri;
  69                                 _methodBase = request.MethodBase;
  70                         }
  71                         if (_args == null) _args = new object [outArgCount];
  72                 }
  73
  74                 public ReturnMessage (Exception exc, IMethodCallMessage request)
  75                 {
  76                         _exception = exc;
  77
  78                         if (request != null)
  79                                 _methodBase = request.MethodBase;
  80                         _args = new object[0];  // .NET does this
  81                 }
  82
  83                 public int ArgCount {
  84                         get {
  85                                 return _args.Length;
  86                         }
  87                 }
  88
  89                 public object [] Args {
  90                         get {
  91                                 return _args;
  92                         }
  93                 }
  94
  95                 public bool HasVarArgs {
  96                         get {
  97                                 if (_methodBase == null) return false;
  98                                 else return (_methodBase.CallingConvention | CallingConventions.VarArgs) != 0;
  99                         }
 100                 }
 101
 102                 public LogicalCallContext LogicalCallContext {
 103                         get {
 104                                 if (_callCtx == null)
 105                                         return LogicalCallContext.Empty;
 106                                 else
 107                                         return _callCtx;
 108                         }
 109                 }
 110
 111                 public MethodBase MethodBase {
 112                         get {
 113                                 return _methodBase;
 114                         }
 115                 }
 116
 117                 public string MethodName {
 118                         get {
 119                                 if (_methodBase != null && _methodName == null)
 120                                         _methodName = _methodBase.Name;
 121                                 return _methodName;
 122                         }
 123                 }
 124
 125                 public object MethodSignature {
 126                         get {
 127                                 if (_methodBase != null && _methodSignature == null) {
 128                                         ParameterInfo[] parameters = _methodBase.GetParameters();
 129                                         _methodSignature = new Type [parameters.Length];
 130                                         for (int n=0; n<parameters.Length; n++)
 131                                                 _methodSignature[n] = parameters[n].ParameterType;
 132                                 }
 133                                 return _methodSignature;
 134                         }
 135                 }
 136
 137                 public virtual IDictionary Properties {
 138                         get {
 139                                 if (_properties == null) _properties = new MethodReturnDictionary (this);
 140                                 return _properties;
 141                         }
 142                 }
 143
 144                 public string TypeName {
 145                         get {
 146
 147                                 // lazily fill in _typeName from _methodBase
 148                                 if (_methodBase != null && _typeName == null)
 149                                         _typeName = _methodBase.DeclaringType.AssemblyQualifiedName;
 150                                 return _typeName;
 151
 152                         }
 153                 }
 154
 155                 public string Uri {
 156                         get {
 157                                 return _uri;
 158                         }
 159
 160                         set {
 161                                 _uri = value;
 162                         }
 163                 }
 164
 165                 public object GetArg (int arg_num)
 166                 {
 167                         return _args [arg_num];
 168                 }
 169
 170                 public string GetArgName (int arg_num)
 171                 {
 172                         return _methodBase.GetParameters()[arg_num].Name;
 173                 }
 174
 175                 public Exception Exception {
 176                         get {
 177                                 return _exception;
 178                         }
 179                 }
 180
 181                 public int OutArgCount {
 182                         get {
 183                                 if (_args == null || _args.Length == 0) return 0;
 184                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 185                                 return _inArgInfo.GetInOutArgCount ();
 186                         }
 187                 }
 188
 189                 public object [] OutArgs {
 190                         get {
 191                                 if (_outArgs == null && _args != null) {
 192                                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 193                                         _outArgs = _inArgInfo.GetInOutArgs (_args);
 194                                 }
 195                                 return _outArgs;
 196                         }
 197                 }
 198
 199                 public virtual object ReturnValue {
 200                         get {
 201                                 return _returnValue;
 202                         }
 203                 }
 204
 205                 public object GetOutArg (int arg_num)
 206                 {
 207                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 208                         return _args[_inArgInfo.GetInOutArgIndex (arg_num)];
 209                 }
 210
 211                 public string GetOutArgName (int arg_num)
 212                 {
 213                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 214                         return _inArgInfo.GetInOutArgName(arg_num);
 215                 }
 216
 217                 Identity IInternalMessage.TargetIdentity
 218                 {
 219                         get { return _targetIdentity; }
 220                         set { _targetIdentity = value; }
 221                 }
 222
 223                 public override string ToString ()
 224                 {
 225                         string s = TypeName.Split(',')[0] + "." + MethodName + " (";
 226                         if (_exception != null)
 227                         {
 228                                 s += "Exception)\n" + _exception;
 229                         }
 230                         else
 231                         {
 232                                 for (int n=0; n<OutArgs.Length; n++)
 233                                 {
 234                                         if (n>0) s+= ", ";
 235                                         if (OutArgs[n] != null) s += OutArgs[n].GetType().Name + " ";
 236                                         s += GetOutArgName (n);
 237                                         if (OutArgs[n] != null) s += " = {" + OutArgs[n] + "}";
 238                                         else s+=" = {null}";
 239                                 }
 240                                 s += ")";
 241                         }
 242                         return s;
 243                 }
 244         }
 245 }