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                                 _callCtx = request.LogicalCallContext;
  81                         }
  82                         _args = new object[0];  // .NET does this
  83                 }
  84
  85                 public int ArgCount {
  86                         get {
  87                                 return _args.Length;
  88                         }
  89                 }
  90
  91                 public object [] Args {
  92                         get {
  93                                 return _args;
  94                         }
  95                 }
  96
  97                 public bool HasVarArgs {
  98                         get {
  99                                 if (_methodBase == null) return false;
 100                                 else return (_methodBase.CallingConvention | CallingConventions.VarArgs) != 0;
 101                         }
 102                 }
 103
 104                 public LogicalCallContext LogicalCallContext {
 105                         get {
 106                                 if (_callCtx == null)
 107                                         _callCtx = new LogicalCallContext ();
 108                                 return _callCtx;
 109                         }
 110                 }
 111
 112                 public MethodBase MethodBase {
 113                         get {
 114                                 return _methodBase;
 115                         }
 116                 }
 117
 118                 public string MethodName {
 119                         get {
 120                                 if (_methodBase != null && _methodName == null)
 121                                         _methodName = _methodBase.Name;
 122                                 return _methodName;
 123                         }
 124                 }
 125
 126                 public object MethodSignature {
 127                         get {
 128                                 if (_methodBase != null && _methodSignature == null) {
 129                                         ParameterInfo[] parameters = _methodBase.GetParameters();
 130                                         _methodSignature = new Type [parameters.Length];
 131                                         for (int n=0; n<parameters.Length; n++)
 132                                                 _methodSignature[n] = parameters[n].ParameterType;
 133                                 }
 134                                 return _methodSignature;
 135                         }
 136                 }
 137
 138                 public virtual IDictionary Properties {
 139                         get {
 140                                 if (_properties == null) _properties = new MethodReturnDictionary (this);
 141                                 return _properties;
 142                         }
 143                 }
 144
 145                 public string TypeName {
 146                         get {
 147
 148                                 // lazily fill in _typeName from _methodBase
 149                                 if (_methodBase != null && _typeName == null)
 150                                         _typeName = _methodBase.DeclaringType.AssemblyQualifiedName;
 151                                 return _typeName;
 152
 153                         }
 154                 }
 155
 156                 public string Uri {
 157                         get {
 158                                 return _uri;
 159                         }
 160
 161                         set {
 162                                 _uri = value;
 163                         }
 164                 }
 165
 166                 public object GetArg (int arg_num)
 167                 {
 168                         return _args [arg_num];
 169                 }
 170
 171                 public string GetArgName (int arg_num)
 172                 {
 173                         return _methodBase.GetParameters()[arg_num].Name;
 174                 }
 175
 176                 public Exception Exception {
 177                         get {
 178                                 return _exception;
 179                         }
 180                 }
 181
 182                 public int OutArgCount {
 183                         get {
 184                                 if (_args == null || _args.Length == 0) return 0;
 185                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 186                                 return _inArgInfo.GetInOutArgCount ();
 187                         }
 188                 }
 189
 190                 public object [] OutArgs {
 191                         get {
 192                                 if (_outArgs == null && _args != null) {
 193                                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 194                                         _outArgs = _inArgInfo.GetInOutArgs (_args);
 195                                 }
 196                                 return _outArgs;
 197                         }
 198                 }
 199
 200                 public virtual object ReturnValue {
 201                         get {
 202                                 return _returnValue;
 203                         }
 204                 }
 205
 206                 public object GetOutArg (int arg_num)
 207                 {
 208                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 209                         return _args[_inArgInfo.GetInOutArgIndex (arg_num)];
 210                 }
 211
 212                 public string GetOutArgName (int arg_num)
 213                 {
 214                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (MethodBase, ArgInfoType.Out);
 215                         return _inArgInfo.GetInOutArgName(arg_num);
 216                 }
 217
 218                 Identity IInternalMessage.TargetIdentity
 219                 {
 220                         get { return _targetIdentity; }
 221                         set { _targetIdentity = value; }
 222                 }
 223
 224                 public override string ToString ()
 225                 {
 226                         string s = TypeName.Split(',')[0] + "." + MethodName + " (";
 227                         if (_exception != null)
 228                         {
 229                                 s += "Exception)\n" + _exception;
 230                         }
 231                         else
 232                         {
 233                                 for (int n=0; n<OutArgs.Length; n++)
 234                                 {
 235                                         if (n>0) s+= ", ";
 236                                         if (OutArgs[n] != null) s += OutArgs[n].GetType().Name + " ";
 237                                         s += GetOutArgName (n);
 238                                         if (OutArgs[n] != null) s += " = {" + OutArgs[n] + "}";
 239                                         else s+=" = {null}";
 240                                 }
 241                                 s += ")";
 242                         }
 243                         return s;
 244                 }
 245         }
 246 }