Resource Manager B – Source Code

Header

#pragma once
#ifndef AVS_ICANOS_SYSTEM_RESOURCEMANAGERB_HPP
#define AVS_ICANOS_SYSTEM_RESOURCEMANAGERB_HPP

#include <a title="Core" href="http://sfmlcoder.wordpress.com/icanos/system/core/">"Core.hpp"</a>
#include "Exceptions.hpp"
#include <map>

namespace Icanos {
	namespace System {

		template <class Resource> class ResourceManagerB {
			typedef std::pair<URI, Resource*> ResourcePair;
			typedef std::map<URI, Resource*> ResourceList;

			ResourceList Resources;
		public:
			~ResourceManagerB() { UnloadAll(); }

			URI& Load(URI& Uri);
			template <class S> URI& Load(URI& Uri) { return Load(Uri); }
			void Unload(URI& Uri);
			void UnloadAll();

			Resource* Get(URI& Uri);
			template <class T> Resource* Get(URI& Uri) { Get(Uri); }
		};

	}
}

template <class Resource>
Icanos::System::URI& Icanos::System::ResourceManagerB<Resource>::Load(URI& Uri)
{
	if (Resources.find(Uri) == Resources.end())
	{
		Resource* temp = new (std::nothrow) Resource(Uri);
		if (!temp)
			throw Exceptions::BadResourceAllocation();
		Resources.insert(ResourcePair(Uri, temp));
	}
	return Uri;
}

template <class Resource>
void Icanos::System::ResourceManagerB<Resource>::Unload(URI& Uri)
{
	ResourceList::const_iterator itr = Resources.find(Uri);
	if (itr != Resources.end())
	{
		delete itr->second;
		Resources.erase(Uri);
	}
}

template <class Resource>
void Icanos::System::ResourceManagerB<Resource>::UnloadAll()
{
	ResourceList::iterator itr;
	for (itr = Resources.begin(); itr != Resources.end(); itr++)
		delete itr->second;
	Resources.clear();
}

template <class Resource>
Resource* Icanos::System::ResourceManagerB<Resource>::Get(URI& Uri)
{
	ResourceList::const_iterator itr;
	if ((itr = Resources.find(Uri)) != Resources.end())
		return itr->second;
	return 0;
}

#endif

(No source file: template class)