Factory< T > Class Template Reference

Generalized static factory that can deliver instances of T, when no variable is needed in the creation. More...

Inheritance diagram for Factory< T >:

Public Types
typedef T *(*	Creator) ()

Public Member Functions
void	addCreator (Creator, const char *nm, const uiString &username=uiString::emptyString())
T *	create (const char *nm) const
	Name may be not be null. More...
Public Member Functions inherited from FactoryBase
virtual	~FactoryBase ()
const char *	currentName () const
BufferString &	errMsg () const
const char *	getDefaultName () const
const BufferStringSet &	getNames () const
const uiStringSet &	getUserNames () const
bool	hasName (const char *n)
bool	isEmpty () const
void	setDefaultName (int idx)
int	size () const

Protected Attributes
TypeSet< Creator >	creators_
Protected Attributes inherited from FactoryBase
StaticStringManager	currentname_
StaticStringManager	errmsgs_

Additional Inherited Members
Static Public Member Functions inherited from FactoryBase
static char	cSeparator ()
Protected Member Functions inherited from FactoryBase
void	addNames (const char *, const uiString &)
int	indexOf (const char *) const
void	setNames (int, const char *, const uiString &)

Detailed Description

template<class T>
class Factory< T >

Generalized static factory that can deliver instances of T, when no variable is needed in the creation.

Usage. Each implementation of the base class T must add themselves to the factory when application starts up, e.g. in an initClass() function:

class A
{
public:
virtual int           myFunc()        = 0;
};
 
class B : public A
{
public:
static A*             createFunc() { return new B; }
static void           initClass()
{ thefactory.addCreator(createFunc,"MyKeyword",
"My Name"); }
 
int                   myFunc();
};

Two macros are available to make a static accessfuncion for the factory:

mDefineFactory( Module, ClassName, FunctionName );

that will create a static function that returns an instance to Factory<ClassName>. If the function is a static member of a class, it has to be defined with the mDefineFactoryInClass macro.

The static function must be implemented in a src-file with the macro

mImplFactory( ClassName, FunctionName );

<>

Member Typedef Documentation

Creator

template<class T >

typedef T*(* Factory< T >::Creator) ()

Member Function Documentation

addCreator()

template<class T >

void Factory< T >::addCreator ( Creator  cr, const char *  nm, const uiString &  username = uiString::emptyString()  )

inline

Name may be not be null If nm is found, old creator is replaced. nm can be a SeparString, separated by cSeparator(), allowing multiple names, where the first name will be the main name that is returned in getNames.

create()

template<class T >

T * Factory< T >::create ( const char *  nm ) const

inline

Name may be not be null.

Member Data Documentation

creators_

template<class T >

TypeSet<Creator> Factory< T >::creators_

protected