public void ToggleSignal(string iface, string member, Delegate dlg, bool adding)
{
MatchRule rule = new MatchRule();
rule.MessageType = MessageType.Signal;
rule.Interface = iface;
rule.Member = member;
rule.Path = object_path;
if (adding)
{
if (conn.Handlers.ContainsKey(rule))
{
conn.Handlers[rule] = Delegate.Combine(conn.Handlers[rule], dlg);
}
else
{
conn.Handlers[rule] = dlg;
conn.AddMatch(rule.ToString());
}
}
else
{
conn.Handlers[rule] = Delegate.Remove(conn.Handlers[rule], dlg);
if (conn.Handlers[rule] == null)
{
conn.RemoveMatch(rule.ToString());
conn.Handlers.Remove(rule);
}
}
}
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];
MatchRule rule = new MatchRule();
rule.MessageType = MessageType.Signal;
rule.Interface = Mapper.GetInterfaceName(mi);
rule.Member = ename;
rule.Path = object_path;
if (parts[0] == "add")
{
if (conn.Handlers.ContainsKey(rule))
{
conn.Handlers[rule] = Delegate.Combine(conn.Handlers[rule], dlg);
}
else
{
conn.Handlers[rule] = dlg;
conn.AddMatch(rule.ToString());
}
}
else if (parts[0] == "remove")
{
conn.Handlers[rule] = Delegate.Remove(conn.Handlers[rule], dlg);
if (conn.Handlers[rule] == null)
{
conn.RemoveMatch(rule.ToString());
conn.Handlers.Remove(rule);
}
}
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.Fields[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);
reader.GetValue(out errMsg);
}
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;
}