Added resource managers

Former-commit-id: 9c071230c1e325ec672c9dfe30ee7e498baa1d08

include/Nazara/Core/ResourceManager.hpp

@@ -0,0 +1,43 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_RESOURCEMANAGER_HPP
+#define NAZARA_RESOURCEMANAGER_HPP
+
+#include <Nazara/Core/ObjectRef.hpp>
+#include <Nazara/Core/String.hpp>
+#include <unordered_map>
+
+template<typename Type, typename Parameters>
+class NzResourceManager
+{
+	friend Type;
+
+	public:
+		NzResourceManager() = delete;
+		~NzResourceManager() = delete;
+
+		static void Clear();
+
+		static NzObjectRef<Type> Get(const NzString& filePath);
+		static const Parameters& GetDefaultParameters();
+
+		static void Purge();
+		static void Register(const NzString& filePath, NzObjectRef<Type> resource);
+		static void SetDefaultParameters(const Parameters& params);
+		static void Unregister(const NzString& filePath);
+
+	private:
+		static bool Initialize();
+		static void Uninitialize();
+
+		using ManagerMap = std::unordered_map<NzString, NzObjectRef<Type>>;
+		using ManagerParams = Parameters;
+};
+
+#include <Nazara/Core/ResourceManager.inl>
+
+#endif // NAZARA_RESOURCEMANAGER_HPP

include/Nazara/Core/ResourceManager.inl

@@ -0,0 +1,100 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/Error.hpp>
+#include <Nazara/Core/File.hpp>
+#include <Nazara/Core/Log.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+template<typename Type, typename Parameters>
+void NzResourceManager<Type, Parameters>::Clear()
+{
+	Type::s_managerMap.clear();
+}
+
+template<typename Type, typename Parameters>
+NzObjectRef<Type> NzResourceManager<Type, Parameters>::Get(const NzString& filePath)
+{
+	NzObjectRef<Type> ref;
+
+	NzString absolutePath = NzFile::AbsolutePath(filePath);
+	auto it = Type::s_managerMap.find(absolutePath);
+	if (it == Type::s_managerMap.end())
+	{
+		NzObjectRef<Type> resource = Type::New();
+		if (!resource)
+		{
+			NazaraError("Failed to create resource");
+			return ref;
+		}
+
+		if (!resource->LoadFromFile(absolutePath, GetDefaultParameters()))
+		{
+			NazaraError("Failed to load resource from file: " + absolutePath);
+			return ref;
+		}
+
+		NazaraDebug("Loaded resource from file " + absolutePath);
+
+		it = Type::s_managerMap.insert(std::make_pair(absolutePath, resource)).first;
+	}
+
+	return it->second;
+}
+
+template<typename Type, typename Parameters>
+const Parameters& NzResourceManager<Type, Parameters>::GetDefaultParameters()
+{
+	return Type::s_managerParameters;
+}
+
+template<typename Type, typename Parameters>
+void NzResourceManager<Type, Parameters>::Purge()
+{
+	auto it = Type::s_managerMap.begin();
+	while (it != Type::s_managerMap.end())
+	{
+		const NzObjectRef<Type>& ref = it->second;
+		if (ref.GetReferenceCount() == 1) // Sommes-nous les seuls à détenir la ressource ?
+			Type::s_managerMap.erase(it++); // Alors on la supprime
+		else
+			++it;
+	}
+}
+
+template<typename Type, typename Parameters>
+void NzResourceManager<Type, Parameters>::Register(const NzString& filePath, NzObjectRef<Type> resource)
+{
+	NzString absolutePath = NzFile::AbsolutePath(filePath);
+
+	Type::s_managerMap[absolutePath] = resource;
+}
+
+template<typename Type, typename Parameters>
+void NzResourceManager<Type, Parameters>::SetDefaultParameters(const Parameters& params)
+{
+	Type::s_managerParameters = params;
+}
+
+template<typename Type, typename Parameters>
+void NzResourceManager<Type, Parameters>::Unregister(const NzString& filePath)
+{
+	NzString absolutePath = NzFile::AbsolutePath(filePath);
+
+	Type::s_managerMap.erase(absolutePath);
+}
+
+template<typename Type, typename Parameters>
+bool NzResourceManager<Type, Parameters>::Initialize()
+{
+	return true;
+}
+
+template<typename Type, typename Parameters>
+void NzResourceManager<Type, Parameters>::Uninitialize()
+{
+	Clear();
+}
+
+#include <Nazara/Core/DebugOff.hpp>