//this might need reworking with MulticastDelegate
internal void HandleSignal(Message msg)
{
Signal signal = new Signal(msg);
//TODO: this is a hack, not necessary when MatchRule is complete
MatchRule rule = new MatchRule();
rule.MessageType = MessageType.Signal;
rule.Fields.Add(FieldCode.Interface, new MatchTest(signal.Interface));
rule.Fields.Add(FieldCode.Member, new MatchTest(signal.Member));
rule.Fields.Add(FieldCode.Path, new MatchTest(signal.Path));
Delegate dlg;
if (Handlers.TryGetValue(rule, out dlg))
{
MethodInfo mi = dlg.GetType().GetMethod("Invoke");
bool compatible = false;
Signature inSig, outSig;
if (TypeImplementer.SigsForMethod(mi, out inSig, out outSig))
{
if (outSig == Signature.Empty && inSig == msg.Signature)
{
compatible = true;
}
}
if (!compatible)
{
if (Protocol.Verbose)
{
Console.Error.WriteLine("Signal argument mismatch: " + signal.Interface + '.' + signal.Member);
}
return;
}
try
{
//signals have no return value
dlg.DynamicInvoke(MessageHelper.GetDynamicValues(msg, mi.GetParameters()));
}
catch (MemberAccessException)
{
throw;
}
catch (TargetInvocationException)
{
if (Protocol.Verbose)
{
Console.Error.WriteLine("Error: Signal handler threw exception " + signal.Member);
}
}
}
else
{
//TODO: how should we handle this condition? sending an Error may not be appropriate in this case
if (Protocol.Verbose)
{
Console.Error.WriteLine("Warning: No signal handler for " + signal.Member);
}
}
}
public void WriteStructure <T> (T value)
{
TypeWriter <T> tWriter = TypeImplementer.GetTypeWriter <T> ();
tWriter(this, value);
}
//this requires a seekable stream for now
public unsafe void WriteArray <T> (T[] val)
{
Type elemType = typeof(T);
if (elemType == typeof(byte))
{
if (val.Length > Protocol.MaxArrayLength)
{
throw new Exception("Array length " + val.Length + " exceeds maximum allowed " + Protocol.MaxArrayLength + " bytes");
}
Write((uint)val.Length);
stream.Write((byte[])(object)val, 0, val.Length);
return;
}
if (elemType.IsEnum)
{
elemType = Enum.GetUnderlyingType(elemType);
}
Signature sigElem = Signature.GetSig(elemType);
int fixedSize = 0;
if (endianness == Connection.NativeEndianness && elemType.IsValueType && !sigElem.IsStruct && sigElem.GetFixedSize(ref fixedSize))
{
int byteLength = fixedSize * val.Length;
if (byteLength > Protocol.MaxArrayLength)
{
throw new Exception("Array length " + byteLength + " exceeds maximum allowed " + Protocol.MaxArrayLength + " bytes");
}
Write((uint)byteLength);
WritePad(sigElem.Alignment);
GCHandle valHandle = GCHandle.Alloc(val, GCHandleType.Pinned);
IntPtr p = valHandle.AddrOfPinnedObject();
byte[] data = new byte[byteLength];
byte * bp = (byte *)p;
for (int i = 0; i != byteLength; i++)
{
data[i] = bp[i];
}
stream.Write(data, 0, data.Length);
valHandle.Free();
return;
}
long origPos = stream.Position;
Write((uint)0);
//advance to the alignment of the element
WritePad(sigElem.Alignment);
long startPos = stream.Position;
TypeWriter <T> tWriter = TypeImplementer.GetTypeWriter <T> ();
foreach (T elem in val)
{
tWriter(this, elem);
}
long endPos = stream.Position;
uint ln = (uint)(endPos - startPos);
stream.Position = origPos;
if (ln > Protocol.MaxArrayLength)
{
throw new Exception("Array length " + ln + " exceeds maximum allowed " + Protocol.MaxArrayLength + " bytes");
}
Write(ln);
stream.Position = endPos;
}
public void WriteValueType(object val, Type type)
{
MethodInfo mi = TypeImplementer.GetWriteMethod(type);
mi.Invoke(null, new object[] { this, val });
}
public virtual void HandleMethodCall(MethodCall method_call)
{
Type type = obj.GetType();
//object retObj = type.InvokeMember (msg.Member, BindingFlags.InvokeMethod, null, obj, MessageHelper.GetDynamicValues (msg));
//TODO: there is no member name mapping for properties etc. yet
// FIXME: Inefficient to do this on every call
MethodInfo mi = Mapper.GetMethod(type, method_call);
if (mi == null)
{
conn.MaybeSendUnknownMethodError(method_call);
return;
}
MethodCaller2 mCaller;
if (!mCallers.TryGetValue(mi, out mCaller))
{
//mCaller = TypeImplementer.GenCaller (mi, obj);
mCaller = TypeImplementer.GenCaller2(mi);
mCallers[mi] = mCaller;
}
Signature inSig, outSig;
TypeImplementer.SigsForMethod(mi, out inSig, out outSig);
Message msg = method_call.message;
MessageReader msgReader = new MessageReader(method_call.message);
MessageWriter retWriter = new MessageWriter();
/*
* MessageWriter retWriter = null;
* if (msg.ReplyExpected)
* retWriter = new MessageWriter ();
*/
Exception raisedException = null;
try {
//mCaller (msgReader, method_call.message, retWriter);
mCaller(obj, msgReader, method_call.message, retWriter);
} catch (Exception e) {
raisedException = e;
}
if (!msg.ReplyExpected)
{
return;
}
Message replyMsg;
if (raisedException == null)
{
MethodReturn method_return = new MethodReturn(msg.Header.Serial);
replyMsg = method_return.message;
replyMsg.Body = retWriter.ToArray();
replyMsg.Signature = outSig;
}
else
{
Error error;
// BusException allows precisely formatted Error messages.
BusException busException = raisedException as BusException;
if (busException != null)
{
error = method_call.CreateError(busException.ErrorName, busException.ErrorMessage);
}
else if (raisedException is ArgumentException && raisedException.TargetSite.Name == mi.Name)
{
// Name match trick above is a hack since we don't have the resolved MethodInfo.
ArgumentException argException = (ArgumentException)raisedException;
using (System.IO.StringReader sr = new System.IO.StringReader(argException.Message)) {
error = method_call.CreateError("org.freedesktop.DBus.Error.InvalidArgs", sr.ReadLine());
}
}
else
{
error = method_call.CreateError(Mapper.GetInterfaceName(raisedException.GetType()), raisedException.Message);
}
replyMsg = error.message;
}
if (method_call.Sender != null)
{
replyMsg.Header[FieldCode.Destination] = method_call.Sender;
}
conn.Send(replyMsg);
}