icinga2/lib/base/dynamictype.h

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef DYNAMICTYPE_H
#define DYNAMICTYPE_H
namespace icinga
{
struct AttributeDescription
{
String Name;
DynamicAttributeType Type;
};
class I2_BASE_API DynamicType : public Object
{
public:
typedef shared_ptr<DynamicType> Ptr;
typedef weak_ptr<DynamicType> WeakPtr;
typedef function<DynamicObject::Ptr (const Dictionary::Ptr&)> ObjectFactory;
typedef map<String, DynamicType::Ptr, string_iless> TypeMap;
typedef map<String, DynamicObject::Ptr, string_iless> NameMap;
DynamicType(const String& name, const ObjectFactory& factory);
String GetName(void) const;
static DynamicType::Ptr GetByName(const String& name);
static void RegisterType(const DynamicType::Ptr& type);
static bool TypeExists(const String& name);
DynamicObject::Ptr CreateObject(const Dictionary::Ptr& serializedUpdate) const;
DynamicObject::Ptr GetObject(const String& name) const;
void RegisterObject(const DynamicObject::Ptr& object);
void UnregisterObject(const DynamicObject::Ptr& object);
static TypeMap& GetTypes(void);
NameMap& GetObjects(void);
void AddAttribute(const String& name, DynamicAttributeType type);
void RemoveAttribute(const String& name);
2013-02-01 14:11:22 +01:00
bool HasAttribute(const String& name);
void AddAttributes(const AttributeDescription *attributes, int attributeCount);
private:
String m_Name;
ObjectFactory m_ObjectFactory;
map<String, DynamicAttributeType> m_Attributes;
NameMap m_Objects;
};
/**
* Helper class for registering DynamicObject implementation classes.
*
* @ingroup base
*/
class RegisterTypeHelper
{
public:
RegisterTypeHelper(const String& name, const DynamicType::ObjectFactory& factory, const AttributeDescription* attributes, int attributeCount)
{
if (!DynamicType::TypeExists(name)) {
DynamicType::Ptr type = boost::make_shared<DynamicType>(name, factory);
type->AddAttributes(attributes, attributeCount);
DynamicType::RegisterType(type);
}
}
};
/**
* Factory function for DynamicObject-based classes.
*
* @ingroup base
*/
template<typename T>
shared_ptr<T> DynamicObjectFactory(const Dictionary::Ptr& serializedUpdate)
{
return boost::make_shared<T>(serializedUpdate);
}
#define REGISTER_TYPE_ALIAS(type, alias, attributeDesc) \
static RegisterTypeHelper g_RegisterDT_ ## type(alias, DynamicObjectFactory<type>, attributeDesc, (attributeDesc == NULL) ? 0 : sizeof(attributeDesc) / sizeof((static_cast<AttributeDescription *>(attributeDesc))[0]))
#define REGISTER_TYPE(type, attributeDesc) \
REGISTER_TYPE_ALIAS(type, #type, attributeDesc)
}
#endif /* DYNAMICTYPE_H */