#include <ossimFactoryBaseTemplate.h>

Public Member Functions
virtual Product *	create (const ossimString &) const =0

virtual Product *	create (const ossimKeywordlist &kwl, const char *prefix) const =0

virtual std::list< ossimString >	getList () const =0

void	registerFactory (ossimFactoryBase< Product > *new_factory)

Protected Member Functions
	ossimFactoryBase ()

virtual	~ossimFactoryBase ()

Protected Attributes
std::list< ossimFactoryBase< Product > * >	theRegistry

Detailed Description

template<class Product>
class ossimFactoryBase< Product >

TEMPLATE: ossimFactoryBase
NOTE: This is primarily intended as an interface template only to insure that all factories prescribe to a common type. Concrete classes shall be derived from an instance of this template as:

class MyFactory : public ossimFactoryBase<MyProductClass>

where MyProductClass is the class type being produced.

This template is applicable to "Registry" type factories that have one or more sub-factories. Thus, a common interface is provided without the client distinguishing between registries and factories.

EXAMPLE: Refer to the projection factories for a working example of the use of this base class template. Specifically, refer to the files:

../ossim_core/projections/factory/ossimProjectionFactory.h
../ossim_core/projections/factory/ossimMapProjectionFactory.h
../ossim_core/projections/factory/ossimSensorModelFactory.h

Definition at line 48 of file ossimFactoryBaseTemplate.h.

Constructor & Destructor Documentation

◆ ossimFactoryBase()

template<class Product>

ossimFactoryBase< Product >::ossimFactoryBase ( )

inlineprotected

PROTECTED DEFAULT CONSTRUCTOR Gives concrete class the opportunity to perform initialization tasks since this is called once with first instance() call. If the derived factory is to serve as a sub-factory registry, then have the derived class' constructor call registerFactory() for all of the default sub-factories involved.

Definition at line 100 of file ossimFactoryBaseTemplate.h.

100 {};

◆ ~ossimFactoryBase()

template<class Product>

virtual ossimFactoryBase< Product >::~ossimFactoryBase ( )

inlineprotectedvirtual

Definition at line 102 of file ossimFactoryBaseTemplate.h.

102 {}

Member Function Documentation

◆ create() [1/2]

template<class Product>

virtual Product* ossimFactoryBase< Product >::create ( const ossimString & ) const

pure virtual

METHOD: instance() For accessing static singleton instance of concrete factory. The derived class implementation of this method invokes the factory's private constructor. MUST BE PROVIDED BY CONCRETE DERIVED CLASS as follows:

static <ossimFactoryBase-derived class>* instance();

PURE VIRTUAL METHODS: create(string), create(keywordlist, prefix)

Attempts to create an instance of the Product given a string or keywordlist. It is up to the concrete factory implementation to decide how to interpret string. It could conceivably represent a "magic number" specification of a product (such as the class name). Or, it could be a filename that the factory must open to decide which product to instantiate. The derived factory can also define other create methods following the model used here.

Returns successfully constructed product or NULL.

Implemented in ossimElevCellHandlerFactory, and ossimAnnotationObjectFactory.