Factory1Param< T, P > Class Template Reference

Generalized static factory that can deliver instances of T, when a variable is needed in the creation. More...

Inheritance diagram for Factory1Param< T, P >:

Public Types
typedef T *(*	Creator) (P)

Public Member Functions
void	addCreator (Creator, const char *nm=nullptr, const uiString &usernm=uiString::emptyString())
T *	create (const char *nm, P, bool chknm=true) const
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 P>
class Factory1Param< T, P >

Generalized static factory that can deliver instances of T, when a 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(C* param)
{
A* res = new B;
if ( res->setParam( param ) );
return res;
 
thefactory.errMsg() = "Could not set param";
delete res;
return 0;
}
static void           initClass()
{ thefactory.addCreator(createFunc,"MyKeyword","My Name"); }
 
int                   myFunc();
};

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

mDefineFactory1Param( Module, ClassName, ParamExpClass, FunctionName );

that will create a static function that returns an instance to Factory1Param<ClassName,ParamExpClass>. The static function must be implemented in a src-file with the macro.

mImplFactory1Param( ClassName, ParamExpClass, FunctionName );

<>

Member Typedef Documentation

Creator

template<class T , class P >

typedef T*(* Factory1Param< T, P >::Creator) (P)

Member Function Documentation

addCreator()

template<class T , class P >

void Factory1Param< T, P >::addCreator ( Creator  cr, const char *  nm = nullptr, const uiString &  usernm = uiString::emptyString()  )

inline

Name may be 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 , class P >

T * Factory1Param< T, P >::create ( const char *  nm, P  data, bool  chknm = true  ) const

inline

Name may be be null, if null name is given chknm will be forced to false

Member Data Documentation

creators_

template<class T , class P >

TypeSet<Creator> Factory1Param< T, P >::creators_

protected