public void Invoke(MethodBase methodBase, string methodName, object[] inArgs, out object[] outArgs, out object retVal, out Exception exception)
{
outArgs = new object[0];
retVal = null;
exception = null;
MethodInfo mi = methodBase as MethodInfo;
if (mi != null && mi.IsSpecialName && (methodName.StartsWith("add_") || methodName.StartsWith("remove_")))
{
string[] parts = methodName.Split(new char[] { '_' }, 2);
string ename = parts[1];
Delegate dlg = (Delegate)inArgs[0];
ToggleSignal(Mapper.GetInterfaceName(mi), ename, dlg, parts[0] == "add");
return;
}
Type[] inTypes = Mapper.GetTypes(ArgDirection.In, mi.GetParameters());
Signature inSig = Signature.GetSig(inTypes);
MethodCall method_call;
Message callMsg;
//build the outbound method call message
{
//this bit is error-prone (no null checking) and will need rewriting when DProxy is replaced
string iface = null;
if (mi != null)
{
iface = Mapper.GetInterfaceName(mi);
}
//map property accessors
//TODO: this needs to be done properly, not with simple String.Replace
//note that IsSpecialName is also for event accessors, but we already handled those and returned
if (mi != null && mi.IsSpecialName)
{
methodName = methodName.Replace("get_", "Get");
methodName = methodName.Replace("set_", "Set");
}
method_call = new MethodCall(object_path, iface, methodName, bus_name, inSig);
callMsg = method_call.message;
if (inArgs != null && inArgs.Length != 0)
{
MessageWriter writer = new MessageWriter(Connection.NativeEndianness);
writer.connection = conn;
for (int i = 0; i != inTypes.Length; i++)
{
writer.Write(inTypes[i], inArgs[i]);
}
callMsg.Body = writer.ToArray();
}
}
//TODO: complete out parameter support
/*
* Type[] outParmTypes = Mapper.GetTypes (ArgDirection.Out, mi.GetParameters ());
* Signature outParmSig = Signature.GetSig (outParmTypes);
*
* if (outParmSig != Signature.Empty)
* throw new Exception ("Out parameters not yet supported: out_signature='" + outParmSig.Value + "'");
*/
Type[] outTypes = new Type[1];
outTypes[0] = mi.ReturnType;
//we default to always requiring replies for now, even though unnecessary
//this is to make sure errors are handled synchronously
//TODO: don't hard code this
bool needsReply = true;
//if (mi.ReturnType == typeof (void))
// needsReply = false;
callMsg.ReplyExpected = needsReply;
callMsg.Signature = inSig;
if (!needsReply)
{
conn.Send(callMsg);
return;
}
#if PROTO_REPLY_SIGNATURE
if (needsReply)
{
Signature outSig = Signature.GetSig(outTypes);
callMsg.Header[FieldCode.ReplySignature] = outSig;
}
#endif
Message retMsg = conn.SendWithReplyAndBlock(callMsg);
//handle the reply message
switch (retMsg.Header.MessageType)
{
case MessageType.MethodReturn:
object[] retVals = MessageHelper.GetDynamicValues(retMsg, outTypes);
if (retVals.Length != 0)
{
retVal = retVals[retVals.Length - 1];
}
break;
case MessageType.Error:
//TODO: typed exceptions
Error error = new Error(retMsg);
string errMsg = String.Empty;
if (retMsg.Signature.Value.StartsWith("s"))
{
MessageReader reader = new MessageReader(retMsg);
errMsg = reader.ReadString();
}
exception = new Exception(error.ErrorName + ": " + errMsg);
break;
default:
throw new Exception("Got unexpected message of type " + retMsg.Header.MessageType + " while waiting for a MethodReturn or Error");
}
return;
}
//not particularly efficient and needs to be generalized
internal void HandleMethodCall(MessageContainer method_call)
{
//TODO: Ping and Introspect need to be abstracted and moved somewhere more appropriate once message filter infrastructure is complete
//FIXME: these special cases are slightly broken for the case where the member but not the interface is specified in the message
if (method_call.Interface == "org.freedesktop.DBus.Peer")
{
switch (method_call.Member)
{
case "Ping":
Send(MessageHelper.ConstructReply(method_call));
return;
case "GetMachineId":
if (MachineId != UUID.Zero)
{
Send(MessageHelper.ConstructReply(method_call, MachineId.ToString()));
return;
}
else
{
// Might want to send back an error here?
}
break;
}
}
if (method_call.Interface == "org.freedesktop.DBus.Introspectable" && method_call.Member == "Introspect")
{
Introspector intro = new Introspector();
intro.root_path = method_call.Path;
intro.WriteStart();
//FIXME: do this properly
//this is messy and inefficient
List <string> linkNodes = new List <string> ();
int depth = method_call.Path.Decomposed.Length;
foreach (ObjectPath pth in registeredObjects.Keys)
{
if (pth.Value == (method_call.Path.Value))
{
ExportObject exo = (ExportObject)registeredObjects[pth];
exo.WriteIntrospect(intro);
}
else
{
for (ObjectPath cur = pth; cur != null; cur = cur.Parent)
{
if (cur.Value == method_call.Path.Value)
{
string linkNode = pth.Decomposed[depth];
if (!linkNodes.Contains(linkNode))
{
intro.WriteNode(linkNode);
linkNodes.Add(linkNode);
}
}
}
}
}
intro.WriteEnd();
Message reply = MessageHelper.ConstructReply(method_call, intro.Xml);
Send(reply);
return;
}
BusObject bo;
if (registeredObjects.TryGetValue(method_call.Path, out bo))
{
ExportObject eo = (ExportObject)bo;
eo.HandleMethodCall(method_call);
}
else
{
MaybeSendUnknownMethodError(method_call);
}
}
public object SendMethodCallOld(string iface, string member, string inSigStr, MessageWriter writer, Type retType, out Exception exception)
{
exception = null;
//TODO: don't ignore retVal, exception etc.
Signature inSig = String.IsNullOrEmpty(inSigStr) ? Signature.Empty : new Signature(inSigStr);
MethodCall method_call = new MethodCall(object_path, iface, member, bus_name, inSig);
Message callMsg = method_call.message;
callMsg.Body = writer.ToArray();
//Invoke Code::
//TODO: complete out parameter support
/*
* Type[] outParmTypes = Mapper.GetTypes (ArgDirection.Out, mi.GetParameters ());
* Signature outParmSig = Signature.GetSig (outParmTypes);
*
* if (outParmSig != Signature.Empty)
* throw new Exception ("Out parameters not yet supported: out_signature='" + outParmSig.Value + "'");
*/
Type[] outTypes = new Type[1];
outTypes[0] = retType;
//we default to always requiring replies for now, even though unnecessary
//this is to make sure errors are handled synchronously
//TODO: don't hard code this
bool needsReply = true;
//if (mi.ReturnType == typeof (void))
// needsReply = false;
callMsg.ReplyExpected = needsReply;
callMsg.Signature = inSig;
if (!needsReply)
{
conn.Send(callMsg);
return(null);
}
#if PROTO_REPLY_SIGNATURE
if (needsReply)
{
Signature outSig = Signature.GetSig(outTypes);
callMsg.Header[FieldCode.ReplySignature] = outSig;
}
#endif
Message retMsg = conn.SendWithReplyAndBlock(callMsg);
object retVal = null;
//handle the reply message
switch (retMsg.Header.MessageType)
{
case MessageType.MethodReturn:
object[] retVals = MessageHelper.GetDynamicValues(retMsg, outTypes);
if (retVals.Length != 0)
{
retVal = retVals[retVals.Length - 1];
}
break;
case MessageType.Error:
//TODO: typed exceptions
Error error = new Error(retMsg);
string errMsg = String.Empty;
if (retMsg.Signature.Value.StartsWith("s"))
{
MessageReader reader = new MessageReader(retMsg);
errMsg = reader.ReadString();
}
exception = new Exception(error.ErrorName + ": " + errMsg);
break;
default:
throw new Exception("Got unexpected message of type " + retMsg.Header.MessageType + " while waiting for a MethodReturn or Error");
}
return(retVal);
}
//this might need reworking with MulticastDelegate
internal void HandleSignal(Message msg)
{
var signal = MessageContainer.FromMessage(msg);
//TODO: this is a hack, not necessary when MatchRule is complete
MatchRule[] rules = new MatchRule[2];
rules[0] = new MatchRule();
rules[0].MessageType = MessageType.Signal;
rules[0].Fields.Add(FieldCode.Interface, new MatchTest(signal.Interface));
rules[0].Fields.Add(FieldCode.Member, new MatchTest(signal.Member));
//rules[0].Fields.Add (FieldCode.Sender, new MatchTest (signal.Sender));
rules[0].Fields.Add(FieldCode.Path, new MatchTest(signal.Path));
rules[1] = new MatchRule();
rules[1].MessageType = MessageType.Signal;
rules[1].Fields.Add(FieldCode.Interface, new MatchTest(signal.Interface));
rules[1].Fields.Add(FieldCode.Member, new MatchTest(signal.Member));
rules[1].Fields.Add(FieldCode.Sender, new MatchTest(signal.Sender));
rules[1].Fields.Add(FieldCode.Path, new MatchTest(signal.Path));
bool handlerFound = false;
foreach (var rule in rules)
{
Delegate dlg;
if (Handlers.TryGetValue(rule, out dlg) && dlg != null)
{
MethodInfo mi = dlg.GetType().GetMethod("Invoke");
bool compatible = false;
Signature inSig, outSig;
bool hasDisposableList;
if (TypeImplementer.SigsForMethod(mi, out inSig, out outSig, out hasDisposableList))
{
if (outSig == Signature.Empty && inSig == msg.Signature && !hasDisposableList)
{
compatible = true;
}
}
if (!compatible)
{
if (ProtocolInformation.Verbose)
{
Console.Error.WriteLine("Signal argument mismatch: " + signal.Interface + '.' + signal.Member);
}
return;
}
//signals have no return value
dlg.DynamicInvoke(MessageHelper.GetDynamicValues(msg, mi.GetParameters()));
handlerFound = true;
}
}
if (!handlerFound)
{
//TODO: how should we handle this condition? sending an Error may not be appropriate in this case
if (ProtocolInformation.Verbose)
{
Console.Error.WriteLine("Warning: No signal handler for " + signal.Member);
}
}
}
