/*************************************************************
* @brief Destructor
*************************************************************/
Connection::~Connection()
{
// Delete all callback objects
CallbackMapIter mapIter = m_CallbackMap.begin() ;
while (mapIter != m_CallbackMap.end())
{
//char const* pType = mapIter->first ;
CallbackList* pList = mapIter->second ;
// Delete all callbacks in this list
CallbackListIter iter = pList->begin() ;
while (iter != pList->end())
{
Callback* pCallback = *iter ;
iter++ ;
delete pCallback ;
}
mapIter++ ;
// Delete the list itself
delete pList ;
}
// Clear out any messages sitting on the queues
while (m_IncomingMessageQueue.size() > 0)
{
ElementXML_Handle hMsg = m_IncomingMessageQueue.back() ;
delete hMsg ;
m_IncomingMessageQueue.pop() ;
}
}
static void do_callback_by_id(Fl_Window *win, unsigned int id) {
/* FIXME: lock this somehow */
CallbackListIt it = callback_list.begin(), it_end = callback_list.end();
ForeignCallbackInfo *info;
for(; it != it_end; ++it) {
info = &(*it);
/* call it */
if(id == info->hash_id && info->cb)
info->cb(win, info->data);
}
}
void foreign_callback_remove(ForeignCallback cb) {
if(callback_list.empty())
return;
/* FIXME: lock this somehow */
CallbackListIt it = callback_list.begin(), it_end = callback_list.end();
while(it != it_end) {
if((*it).cb == cb)
it = callback_list.erase(it);
else
++it;
}
}
/*************************************************************
* @brief Removes a callback from the list of callbacks for a particular type of incoming message.
*
* @param callback The function that was previously registered. If NULL removes all callbacks for this type of message.
* @param pType The type of message to unregister from (currently one of "call", "response" or "notify").
*
* @returns 0 if successful, otherwise an error code to indicate what went wrong.
*************************************************************/
void Connection::UnregisterCallback(IncomingCallback callback, char const* pType)
{
ClearError() ;
if (pType == NULL)
{
SetError(Error::kInvalidArgument) ;
return ;
}
// See if we have a list of callbacks for this type
CallbackList* pList = GetCallbackList(pType) ;
if (pList == NULL)
{
SetError(Error::kCallbackNotFound) ;
return ;
}
if (callback == NULL)
{
// Caller asked to delete all callbacks for this type
delete pList ;
m_CallbackMap[pType] = NULL ;
return ;
}
// Walk the list of callbacks, deleting any objects that
// match the callback function
CallbackListIter iter = pList->begin() ;
bool found = false ;
while (iter != pList->end())
{
Callback* pCallback = *iter ;
iter++ ;
// See if this function matches the one we were passed
// In which case, delete it.
if (pCallback->getFunction() == callback)
{
delete pCallback ;
found = true ;
}
}
if (!found)
SetError(Error::kCallbackNotFound) ;
}
/*************************************************************
* @brief Invoke the list of callbacks matching the doctype of the incoming message.
*
* @param pIncomingMsg The SML message that should be passed to the callbacks.
* @returns The response message (or NULL if there is no response from any callback).
*************************************************************/
ElementXML* Connection::InvokeCallbacks(ElementXML *pIncomingMsg)
{
ClearError() ;
MessageSML *pIncomingSML = (MessageSML*)pIncomingMsg ; // MessageSML is a soarxml::ElementXML, not sml::ElementXML
// Check that we were passed a valid message.
if (pIncomingMsg == NULL)
{
SetError(Error::kInvalidArgument) ;
return NULL ;
}
// Retrieve the type of this message
char const* pType = pIncomingSML->GetDocType() ;
// Check that this message has a valid doc type (all valid SML do)
if (pType == NULL)
{
SetError(Error::kNoDocType) ;
return NULL ;
}
// Decide if this message is a "call" which requires a "response"
bool isIncomingCall = pIncomingSML->IsCall() ;
// See if we have a list of callbacks for this type
CallbackList* pList = GetCallbackList(pType) ;
// Nobody was interested in this type of message, so we're done.
if (pList == NULL)
{
return NULL ;
}
CallbackListIter iter = pList->begin() ;
// Walk the list of callbacks in turn until we reach
// the end or one returns a message.
while (iter != pList->end())
{
Callback* pCallback = *iter ;
iter++ ;
ElementXML* pResponse = pCallback->Invoke(pIncomingMsg) ;
if (pResponse != NULL)
{
if (isIncomingCall)
return pResponse ;
// This callback was not for a call and should not return a result.
// Delete the result and ignore it.
pResponse->ReleaseRefOnHandle() ;
pResponse = NULL ;
}
}
// If this is a call, we must respond
if (isIncomingCall)
SetError(Error::kNoResponseToCall) ;
// Nobody returned a response
return NULL ;
}