Loader< T > Class Template Reference

This class provides methods for loading an object from a library and destroying it. More...

#include <Loader.h>

List of all members.

Static Public Member Functions
static void	deleteObject (T *obj)
static T *	createObject (XMLNode *xml)
Private Member Functions
typedef T *	_create_w (XMLNode *)
typedef void	_destroy_w (T *)
Private Attributes
_destroy_w *	clean
void *	lib

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Detailed Description

template<typename T>
class Loader< T >

This class provides methods for loading an object from a library and destroying it.

Creating objects directly out of a library is not possible. So two factory-methods are used:

• One for creating a new object, which simply calls the constructor.
• One for destructing an object. Each object stores a pointer to this factory-method, because only this method can destroy the object without crashes.

This kind of object, which has been loaded from a library, has been named "loaded-object".

It is improtant to declare a virtual destructor in each class, which uses this class as superclass. Without this virtual destructor, the programm may crash during deletion of a loaded-object.

Date:

3rd of May 2007

Author:

Thomas Weberndorfer

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Member Function Documentation

template<typename T>

typedef T* Loader< T >::_create_w

(

XMLNode *

)

[private]

template<typename T>

typedef void Loader< T >::_destroy_w

(

T *

)

[private]

template<typename T>

static T* Loader< T >::createObject

(

XMLNode *

xml

)

[inline, static]

This method creates and returns a loaded-object out of a library. The library-filename and the classname must be defined in the XML-Node, which is wrapped in the XMLNode -object. The used library must be of type "shared object", must provide the two factory-methods and of course the class.

Parameters:

xml

Pass an XMLNode -object focusing on the correct XML-node.

Returns:

This method returns an instance of a loaded-object or NULL in case of an error.

template<typename T>

static void Loader< T >::deleteObject

(

T *

obj

)

[inline, static]

This method is used to destroy a loaded-object. Do not delete an loaded-object with delete!

Parameters:

obj

This pointer must point to the loaded-object, which should be deleted.

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Member Data Documentation

template<typename T>

_destroy_w* Loader< T >::clean [private]

template<typename T>

void* Loader< T >::lib [private]

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

• tools/libraries/3DMenu/core/Loader.h