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                         _uri = string.Copy (msg.Uri);
  79
  80                         // Get unmarshalled arguments
  81                         ArrayList args = msg.GetArguments ();
  82
  83                         _args = msg.GetArgs (args);
  84                         _callContext = msg.GetLogicalCallContext (args);
  85                         if (_callContext == null)
  86                                 _callContext = new LogicalCallContext ();
  87
  88                         _methodBase = MethodBase.GetMethodFromHandle (msg.MethodHandle);
  89                         Init();
  90
  91                         if (msg.PropertiesCount > 0)
  92                                 CADMessageBase.UnmarshalProperties (Properties, msg.PropertiesCount, args);
  93                 }
  94
  95                 public MethodCall (IMessage msg)
  96                 {
  97                         if (msg is IMethodMessage)
  98                                 CopyFrom ((IMethodMessage) msg);
  99                         else
 100                         {
 101                                 foreach (DictionaryEntry entry in msg.Properties)
 102                                         InitMethodProperty ((String) entry.Key, entry.Value);
 103                                 Init();
 104                 }
 105                 }
 106
 107                 internal MethodCall (string uri, string typeName, string methodName, object[] args)
 108                 {
 109                         _uri = uri;
 110                         _typeName = typeName;
 111                         _methodName = methodName;
 112                         _args = args;
 113
 114                         Init();
 115                         ResolveMethod();
 116                 }
 117
 118                 internal MethodCall ()
 119                 {
 120                 }
 121
 122                 internal void CopyFrom (IMethodMessage call)
 123                 {
 124                         _uri = call.Uri;
 125                         _typeName = call.TypeName;
 126                         _methodName = call.MethodName;
 127                         _args = call.Args;
 128                         _methodSignature = (Type[]) call.MethodSignature;
 129                         _methodBase = call.MethodBase;
 130                         _callContext = call.LogicalCallContext;
 131
 132                         Init();
 133                 }
 134
 135                 internal virtual void InitMethodProperty(string key, object value)
 136                 {
 137                         switch (key)
 138                         {
 139                                 case "__TypeName" : _typeName = (string) value; return;
 140                                 case "__MethodName" : _methodName = (string) value; return;
 141                                 case "__MethodSignature" : _methodSignature = (Type[]) value; return;
 142                                 case "__Args" : _args = (object[]) value; return;
 143                                 case "__CallContext" : _callContext = (LogicalCallContext) value; return;
 144                                 case "__Uri" : _uri = (string) value; return;
 145                                 default: Properties[key] = value; return;
 146                         }
 147                 }
 148
 149                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
 150                 {
 151                         info.AddValue ("__TypeName", _typeName);
 152                         info.AddValue ("__MethodName", _methodName);
 153                         info.AddValue ("__MethodSignature", _methodSignature);
 154                         info.AddValue ("__Args", _args);
 155                         info.AddValue ("__CallContext", _callContext);
 156                         info.AddValue ("__Uri", _uri);
 157
 158                         if (InternalProperties != null) {
 159                                 foreach (DictionaryEntry entry in InternalProperties)
 160                                         info.AddValue ((string) entry.Key, entry.Value);
 161                         }
 162                 }
 163
 164                 public int ArgCount {
 165                         get { return _args.Length; }
 166                 }
 167
 168                 public object[] Args {
 169                         get { return _args; }
 170                 }
 171
 172                 public bool HasVarArgs {
 173                         get { return (MethodBase.CallingConvention | CallingConventions.VarArgs) != 0; }
 174                 }
 175
 176                 public int InArgCount
 177                 {
 178                         get
 179                         {
 180                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 181                                 return _inArgInfo.GetInOutArgCount();
 182                         }
 183                 }
 184
 185                 public object[] InArgs
 186                 {
 187                         get
 188                         {
 189                                 if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 190                                 return _inArgInfo.GetInOutArgs (_args);
 191                         }
 192                 }
 193
 194                 public LogicalCallContext LogicalCallContext {
 195                         get { return _callContext; }
 196                 }
 197
 198                 public MethodBase MethodBase {
 199                         get {
 200                                 if (_methodBase == null)
 201                                         ResolveMethod ();
 202
 203                                 return _methodBase;
 204                         }
 205                 }
 206
 207                 public string MethodName {
 208                         get {
 209                                 // lazily fill in _methodName from _methodBase
 210                                 if (_methodName == null)
 211                                         _methodName = _methodBase.Name;
 212                                 return _methodName;
 213                         }
 214                 }
 215
 216                 public object MethodSignature {
 217                         get {
 218                                 if (_methodSignature == null && _methodBase != null)
 219                                 {
 220                                         ParameterInfo[] parameters = _methodBase.GetParameters();
 221                                         _methodSignature = new Type[parameters.Length];
 222                                         for (int n=0; n<parameters.Length; n++)
 223                                                 _methodSignature[n] = parameters[n].ParameterType;
 224                                 }
 225                                 return _methodSignature;
 226                         }
 227                 }
 228
 229                 public virtual IDictionary Properties {
 230                         get
 231                         {
 232                                 if (ExternalProperties == null) InitDictionary ();
 233                                 return ExternalProperties;
 234                         }
 235                 }
 236
 237                 internal virtual void InitDictionary()
 238                 {
 239                         MethodCallDictionary props = new MethodCallDictionary (this);
 240                         ExternalProperties = props;
 241                         InternalProperties = props.GetInternalProperties();
 242                 }
 243
 244                 public string TypeName
 245                 {
 246                         get {
 247                                 // lazily fill in _typeName from _methodBase
 248                                 if (_typeName == null)
 249                                         _typeName = _methodBase.DeclaringType.AssemblyQualifiedName;
 250                                 return _typeName;
 251                         }
 252                 }
 253
 254                 public string Uri {
 255                         get { return _uri; }
 256                         set { _uri = value; }
 257                 }
 258
 259                 public object GetArg (int argNum)
 260                 {
 261                         return _args[argNum];
 262                 }
 263
 264                 public string GetArgName (int index)
 265                 {
 266                         return _methodBase.GetParameters()[index].Name;
 267                 }
 268
 269                 public object GetInArg (int argNum)
 270                 {
 271                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 272                         return _args[_inArgInfo.GetInOutArgIndex (argNum)];
 273                 }
 274
 275                 public string GetInArgName (int index)
 276                 {
 277                         if (_inArgInfo == null) _inArgInfo = new ArgInfo (_methodBase, ArgInfoType.In);
 278                         return _inArgInfo.GetInOutArgName(index);
 279                 }
 280
 281                 [MonoTODO]
 282                 public virtual object HeaderHandler (Header[] h)
 283                 {
 284                         throw new NotImplementedException ();
 285                 }
 286
 287                 public virtual void Init ()
 288                 {
 289                 }
 290
 291                 public void ResolveMethod ()
 292                 {
 293                         if (_uri != null)
 294                         {
 295                                 Type type = RemotingServices.GetServerTypeForUri (_uri);
 296                                 if (type == null) throw new RemotingException ("Requested service not found. No receiver for uri " + _uri);
 297
 298                                 if (CanCastTo (_typeName, type)) {
 299                                         _methodBase = RemotingServices.GetMethodBaseFromName (type, _methodName, _methodSignature);
 300                                         return;
 301                                 }
 302                                 else
 303                                         throw new RemotingException ("Cannot cast from client type '" + _typeName + "' to server type '" + type.FullName + "'");
 304                         }
 305                         _methodBase = RemotingServices.GetMethodBaseFromMethodMessage (this);
 306                 }
 307
 308                 bool CanCastTo (string clientType, Type serverType)
 309                 {
 310                         int i = clientType.IndexOf(',');
 311                         if (i != -1) clientType = clientType.Substring (0,i).Trim();
 312
 313                         if (clientType == serverType.FullName) return true;
 314
 315                         // base class hierarchy
 316
 317                         Type baseType = serverType.BaseType;
 318                         while (baseType != null) {
 319                         if (clientType == baseType.FullName) return true;
 320                         baseType = baseType.BaseType;
 321                 }
 322
 323                         // Implemented interfaces
 324
 325                         Type[] interfaces = serverType.GetInterfaces();
 326                         foreach (Type itype in interfaces)
 327                                 if (clientType == itype.FullName) return true;
 328
 329                 return false;
 330                 }
 331
 332                 [MonoTODO]
 333                 public void RootSetObjectData (SerializationInfo info, StreamingContext context)
 334                 {
 335                         throw new NotImplementedException ();
 336                 }
 337
 338                 Identity IInternalMessage.TargetIdentity
 339                 {
 340                         get { return _targetIdentity; }
 341                         set { _targetIdentity = value; }
 342                 }
 343
 344                 public override string ToString ()
 345                 {
 346                         string s = _typeName.Split(',')[0] + "." + _methodName + " (";
 347                         if (_args != null)
 348                         {
 349                                 for (int n=0; n<_args.Length; n++)
 350                                 {
 351                                         if (n>0) s+= ", ";
 352                                         if (_args[n] != null) s += _args[n].GetType().Name + " ";
 353                                         s += GetArgName (n);
 354                                         if (_args[n] != null) s += " = {" + _args[n] + "}";
 355                                         else s+=" = {null}";
 356                                 }
 357                         }
 358                         s += ")";
 359                         return s;
 360                 }
 361         }
 362 }