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

   1 //
   2 // System.Runtime.Remoting.Messaging.MethodCall.cs
   3 //
   4 // Author: Duncan Mak (duncan@ximian.com)
   5 //         Lluis Sanchez Gual (lluis@ideary.com)
   6 //
   7 // 2002 (C) Copyright, Ximian, Inc.
   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.Runtime.Serialization;
  37
  38 namespace System.Runtime.Remoting.Messaging {
  39
  40         [Serializable] [CLSCompliant (false)]
  41         public class MethodCall : IMethodCallMessage, IMethodMessage, IMessage, ISerializable, IInternalMessage, ISerializationRootObject
  42         {
  43                 string _uri;
  44                 string _typeName;
  45                 string _methodName;
  46                 object[] _args;
  47                 Type[] _methodSignature;
  48                 MethodBase _methodBase;
  49                 LogicalCallContext _callContext;
  50                 ArgInfo _inArgInfo;
  51                 Identity _targetIdentity;
  52
  53                 protected IDictionary ExternalProperties;
  54                 protected IDictionary InternalProperties;
  55
  56                 public MethodCall (Header [] headers)
  57                 {
  58                         Init();
  59
  60                         if (headers == null || headers.Length == 0) return;
  61
  62                         foreach (Header header in headers)
  63                                 InitMethodProperty (header.Name, header.Value);
  64
  65                         ResolveMethod ();
  66                 }
  67
  68                 internal MethodCall (SerializationInfo info, StreamingContext context)
  69                 {
  70                         Init();
  71
  72                         foreach (SerializationEntry entry in info)
  73                                 InitMethodProperty ((string)entry.Name, entry.Value);
  74                 }
  75
  76                 internal MethodCall (CADMethodCallMessage msg)
  77                 {
  78                         _typeName = string.Copy (msg.TypeName);
  79                         _uri = string.Copy (msg.Uri);
  80                         _methodName = string.Copy (msg.MethodName);
  81
  82                         // Get unmarshalled arguments
  83                         ArrayList args = msg.GetArguments ();
  84
  85                         _args = msg.GetArgs (args);
  86                         _methodSignature = (Type []) msg.GetMethodSignature (args);
  87                         _callContext = msg.GetLogicalCallContext (args);
  88                         if (_callContext == null) _callContext = new LogicalCallContext ();
  89
  90                         ResolveMethod ();
  91                         Init();
  92
  93                         if (msg.PropertiesCount > 0)
  94                                 CADMessageBase.UnmarshalProperties (Properties, msg.PropertiesCount, args);
  95                 }
  96
  97                 public MethodCall (IMessage msg)
  98                 {
  99                         if (msg is IMethodMessage)
 100                                 CopyFrom ((IMethodMessage) msg);
 101                         else
 102                         {
 103                                 IDictionary dic = msg.Properties;
 104                                 foreach (DictionaryEntry entry in msg.Properties)
 105                                         InitMethodProperty ((String) entry.Key, entry.Value);
 106                                 Init();
 107                 }
 108                 }
 109
 110                 internal MethodCall (string uri, string typeName, string methodName, object[] args)
 111                 {
 112                         _uri = uri;
 113                         _typeName = typeName;
 114                         _methodName = methodName;
 115                         _args = args;
 116
 117                         Init();
 118                         ResolveMethod();
 119                 }
 120
 121                 internal MethodCall ()
 122                 {
 123                 }
 124
 125                 internal void CopyFrom (IMethodMessage call)
 126                 {
 127                         _uri = call.Uri;
 128                         _typeName = call.TypeName;
 129                         _methodName = call.MethodName;
 130                         _args = call.Args;
 131                         _methodSignature = (Type[]) call.MethodSignature;
 132                         _methodBase = call.MethodBase;
 133                         _callContext = call.LogicalCallContext;
 134
 135                         Init();
 136                 }
 137
 138                 internal virtual void InitMethodProperty(string key, object value)
 139                 {
 140                         switch (key)
 141                         {
 142                                 case "__TypeName" : _typeName = (string) value; return;
 143                                 case "__MethodName" : _methodName = (string) value; return;
 144                                 case "__MethodSignature" : _methodSignature = (Type[]) value; return;
 145                                 case "__Args" : _args = (object[]) value; return;
 146                                 case "__CallContext" : _callContext = (LogicalCallContext) value; return;
 147                                 case "__Uri" : _uri = (string) value; return;
 148                                 default: Properties[key] = value; return;
 149                         }
 150                 }
 151
 152                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
 153                 {
 154                         info.AddValue ("__TypeName", _typeName);
 155                         info.AddValue ("__MethodName", _methodName);
 156                         info.AddValue ("__MethodSignature", _methodSignature);
 157                         info.AddValue ("__Args", _args);
 158                         info.AddValue ("__CallContext", _callContext);
 159                         info.AddValue ("__Uri", _uri);
 160
 161                         if (InternalProperties != null) {
 162                                 foreach (DictionaryEntry entry in InternalProperties)
 163                                         info.AddValue ((string) entry.Key, entry.Value);
 164                         }
 165                 }
 166
 167                 public int ArgCount {
 168                         get { return _args.Length; }
 169                 }
 170
 171                 public object[] Args {
 172                         get { return _args; }
 173                 }
 174
 175                 public bool HasVarArgs {
 176                         get { return (MethodBase.CallingConvention | CallingConventions.VarArgs) != 0; }
 177                 }
 178
 179                 public int InArgCount
 180                 {
 181                         get
 182                         {
 183                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 184                                 return _inArgInfo.GetInOutArgCount();
 185                         }
 186                 }
 187
 188                 public object[] InArgs
 189                 {
 190                         get
 191                         {
 192                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 193                                 return _inArgInfo.GetInOutArgs (_args);
 194                         }
 195                 }
 196
 197                 public LogicalCallContext LogicalCallContext {
 198                         get { return _callContext; }
 199                 }
 200
 201                 public MethodBase MethodBase {
 202                         get {
 203                                 if (_methodBase == null)
 204                                         ResolveMethod ();
 205
 206                                 return _methodBase;
 207                         }
 208                 }
 209
 210                 public string MethodName {
 211                         get { return _methodName; }
 212                 }
 213
 214                 public object MethodSignature {
 215                         get {
 216                                 if (_methodSignature == null && _methodBase != null)
 217                                 {
 218                                         ParameterInfo[] parameters = _methodBase.GetParameters();
 219                                         _methodSignature = new Type[parameters.Length];
 220                                         for (int n=0; n<parameters.Length; n++)
 221                                                 _methodSignature[n] = parameters[n].ParameterType;
 222                                 }
 223                                 return _methodSignature;
 224                         }
 225                 }
 226
 227                 public virtual IDictionary Properties {
 228                         get
 229                         {
 230                                 if (ExternalProperties == null) InitDictionary ();
 231                                 return ExternalProperties;
 232                         }
 233                 }
 234
 235                 internal virtual void InitDictionary()
 236                 {
 237                         MethodCallDictionary props = new MethodCallDictionary (this);
 238                         ExternalProperties = props;
 239                         InternalProperties = props.GetInternalProperties();
 240                 }
 241
 242                 public string TypeName
 243                 {
 244                         get { return _typeName; }
 245                 }
 246
 247                 public string Uri {
 248                         get { return _uri; }
 249                         set { _uri = value; }
 250                 }
 251
 252                 public object GetArg (int argNum)
 253                 {
 254                         return _args[argNum];
 255                 }
 256
 257                 public string GetArgName (int index)
 258                 {
 259                         return _methodBase.GetParameters()[index].Name;
 260                 }
 261
 262                 public object GetInArg (int argNum)
 263                 {
 264                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 265                         return _args[_inArgInfo.GetInOutArgIndex (argNum)];
 266                 }
 267
 268                 public string GetInArgName (int index)
 269                 {
 270                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 271                         return _inArgInfo.GetInOutArgName(index);
 272                 }
 273
 274                 [MonoTODO]
 275                 public virtual object HeaderHandler (Header[] h)
 276                 {
 277                         throw new NotImplementedException ();
 278                 }
 279
 280                 public virtual void Init ()
 281                 {
 282                 }
 283
 284                 public void ResolveMethod ()
 285                 {
 286                         if (_uri != null)
 287                         {
 288                                 Type type = RemotingServices.GetServerTypeForUri (_uri);
 289                                 if (type == null) throw new RemotingException ("Requested service not found. No receiver for uri " + _uri);
 290
 291                                 if (CanCastTo (_typeName, type)) {
 292                                         _methodBase = RemotingServices.GetMethodBaseFromName (type, _methodName, _methodSignature);
 293                                         return;
 294                                 }
 295                                 else
 296                                         throw new RemotingException ("Cannot cast from client type '" + _typeName + "' to server type '" + type.FullName + "'");
 297                         }
 298                         _methodBase = RemotingServices.GetMethodBaseFromMethodMessage (this);
 299                 }
 300
 301                 bool CanCastTo (string clientType, Type serverType)
 302                 {
 303                         int i = clientType.IndexOf(',');
 304                         if (i != -1) clientType = clientType.Substring (0,i).Trim();
 305
 306                         if (clientType == serverType.FullName) return true;
 307
 308                         // base class hierarchy
 309
 310                         Type baseType = serverType.BaseType;
 311                         while (baseType != null) {
 312                         if (clientType == baseType.FullName) return true;
 313                         baseType = baseType.BaseType;
 314                 }
 315
 316                         // Implemented interfaces
 317
 318                         Type[] interfaces = serverType.GetInterfaces();
 319                         foreach (Type itype in interfaces)
 320                                 if (clientType == itype.FullName) return true;
 321
 322                 return false;
 323                 }
 324
 325                 [MonoTODO]
 326                 public void RootSetObjectData (SerializationInfo info, StreamingContext context)
 327                 {
 328                         throw new NotImplementedException ();
 329                 }
 330
 331                 Identity IInternalMessage.TargetIdentity
 332                 {
 333                         get { return _targetIdentity; }
 334                         set { _targetIdentity = value; }
 335                 }
 336
 337                 public override string ToString ()
 338                 {
 339                         string s = _typeName.Split(',')[0] + "." + _methodName + " (";
 340                         Type[] ts = (Type[]) MethodSignature;
 341                         if (_args != null)
 342                         {
 343                                 for (int n=0; n<_args.Length; n++)
 344                                 {
 345                                         if (n>0) s+= ", ";
 346                                         if (_args[n] != null) s += _args[n].GetType().Name + " ";
 347                                         s += GetArgName (n);
 348                                         if (_args[n] != null) s += " = {" + _args[n] + "}";
 349                                         else s+=" = {null}";
 350                                 }
 351                         }
 352                         s += ")";
 353                         return s;
 354                 }
 355         }
 356 }