// ////////////////////////////////////////////////////////
// Lecture on the CORBA Component Model, summer term 2003
// Assignment 6, Stephan Brumme, 702544
//
// CORBA CCM HomeFinder (Implementation)
//


#include "HomeFinder_Impl.h"
// the Corba Naming Service is invoked
#include <coss/CosNaming.h>



// note: a very handsome guy was born on 12/27/1978 ...
CORBA::Long HomeFinder_Impl::uniqueId = 271278; 


// look for the first entry in the directory where comp_repid matched
// else throw a HomeNotFound exception
CCMHome_ptr HomeFinder_Impl::find_home_by_component_type( const char* comp_repid )
{
	for (directoryIterator iteDirectory = directory.begin(); iteDirectory != directory.end(); iteDirectory++)
		if (iteDirectory->compRepId == comp_repid)
			// match !
			return CCMHome::_narrow(orb->string_to_object(iteDirectory->homeName.c_str()));

	// not found ...
	throw new HomeNotFound;
}


// look for the first entry in the directory where home_repid matched
// else throw a HomeNotFound exception
CCMHome_ptr HomeFinder_Impl::find_home_by_home_type( const char* home_repid )
{
	for (directoryIterator iteDirectory = directory.begin(); iteDirectory != directory.end(); iteDirectory++)
		if (iteDirectory->homeRepId == home_repid)
			// match !
			return CCMHome::_narrow(orb->string_to_object(iteDirectory->homeName.c_str()));

	// not found ...
	throw new HomeNotFound;
}


// resolve the home_name using the Corba naming service
// else throw a HomeNotFound exception
CCMHome_ptr HomeFinder_Impl::find_home_by_name( const char* home_name )
{
	// resolve naming service
	CORBA::Object_var namingService = orb->resolve_initial_references("NameService");
	// get the naming context
	CosNaming::NamingContext_var namingContext = CosNaming::NamingContext::_narrow(namingService);

	// not connected ?
	if(CORBA::is_nil(namingContext))
	{
		cout << "Couldn't locate the Naming Service." << endl;
		throw new HomeNotFound;
	}

	// ask naming service
	CosNaming::Name findName;
	findName.length(1);
	findName[0].id   = CORBA::string_dup(home_name);
	findName[0].kind = CORBA::string_dup("");

	// resolve
	CORBA::Object_var home = namingContext->resolve(findName);

	// not found ?
	if(CORBA::is_nil(home))
		throw new HomeNotFound;
	
	return CCMHome::_narrow(home);
}


// add a new home to the directory
CORBA::Long HomeFinder_Impl::_cxx_register( const char* comp_repid, const char* home_repid, ::Components::CCMHome_ptr the_home )
{
	// provides enough "uniqueness" for my purposes
	uniqueId++;

	// construction of a new entry
	Entry entry;
	entry.compRepId = comp_repid;
	entry.homeRepId = home_repid;
	entry.homeName  = orb->object_to_string(the_home);
	entry.uniqueId  = uniqueId;

	// add to the directory
	directory.push_back(entry);
	return uniqueId;
}


// remove an entry from the directory
// else throw a HomeNotFound exception
void HomeFinder_Impl::unregister( CORBA::Long cookie )
{
	for (directoryIterator iteDirectory = directory.begin(); iteDirectory != directory.end(); iteDirectory++)
		if (iteDirectory->uniqueId == cookie)
		{
			directory.erase(iteDirectory, iteDirectory++);
			return;
		}

	// entry not part of the directory ?
	throw new HomeNotFound;
}