drwnFactory< U > Class Template Reference

Templated factory for creating or cloning objects for a particular base class. More...

Public Member Functions
void	registerClass (const char *name, drwnCreatorFcn fcn)
	register a class and creator function
void	unregisterClass (const char *name)
	unregister a previously registered class
list< string >	getRegisteredClasses () const
	get a list of all registered classes
U *	create (const char *name) const
	create a default object
U *	createFromXML (drwnXMLNode &xml) const
	create an object from an XML node
U *	createFromFile (const char *filename) const
	create an object from file
void	dump () const
	dump the contents of the registery for debugging

Static Public Member Functions
static drwnFactory< U > &	get ()
	get the factory

Protected Types
typedef U *(*	drwnCreatorFcn )(void)

Protected Member Functions
	drwnFactory ()
	singleton class so hide constructor

Protected Attributes
bool	_initialized
map< string, drwnCreatorFcn >	_registry

Detailed Description

template<typename U>
class drwnFactory< U >

Templated factory for creating or cloning objects for a particular base class.

The base class must be default constructable and implement an XML load function (e.g., be derived from drwnWriteable).

Each derived object should register with factory using the register function, for example,

drwnClassifier *createMyClassifier() { return new myClassifier(); }
...
drwnFactory<drwnClassifier>::get().registerClass("myClassifier", createMyClassifier);

The macro DRWN_FACTORY_REGISTER(U, T) provides a short way to register class T in factory drwnFactory<U>.

Built-in Darwin classes are (statically) registered on construction using the drwnFactoryTraits class. External (i.e., add-on) factory object should be explicitly registered.

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The documentation for this class was generated from the following file:

• drwnFactory.h