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#ifndef __KONFORKA_BASIC_WRAPPER_H
#define __KONFORKA_BASIC_WRAPPER_H
/**
* @file
* @brief The konforka::basic_wrapper class declaration.
*/
#include <konforka/exception.h>
namespace konforka {
/**
* @brief The basic wrapper class.
*
*/
template<typename T>
class basic_wrapper {
public:
/**
* The type of wrapped content.
*/
typedef T content_type;
/**
* The content wrapped into the instance.
*/
content_type opkele;
/**
* This boolean indicates whether the object has a content
* attached to it.
*/
bool bopkele;
/**
* Default constructors creates the object with no content
* associated with it.
*/
basic_wrapper()
: bopkele(false) { }
/**
* The constructor associates the content give with the object.
* @param o the content being attached to the object.
*/
basic_wrapper(content_type o)
: opkele(o), bopkele(true) { }
/**
* Virtual destructor doing nothing in this class.
*/
virtual ~basic_wrapper() { }
/**
* Attaches the given content to the object.
* @param o the content being attached to the object.
*/
void attach(content_type o) {
opkele = o;
bopkele = true;
}
/**
* Test whether the object has content attached.
* @return naturally, returns true if yes.
*/
bool is() const {
return bopkele;
}
/**
* Throws an exception in case the object lacks content
* attached.
*/
void ensure() const {
if(!is())
throw konforka::exception(CODEPOINT,"no content attached");
}
/**
* Get the content attached to the object. It would throw an
* exception if there is no content attached.
* @return reference to the content.
*/
virtual content_type& get_content() {
ensure();
return opkele;
}
/**
* Get the content attached to the object. It would throw an
* exception if there is no content attached.
* @return const reference to the content.
*/
virtual const content_type& get_content() const {
ensure();
return opkele;
}
/**
* Casts the object to the reference to the content type,
* throwing an exception if there's no content associated with
* an object.
* @return reference to the content attached.
* @see get_content()
*/
operator const content_type&(void) const { return get_content(); }
/**
* Casts the object to the const reference to the content type,
* throwing an exception if there's no content associated with
* an object.
* @return reference to the content attached.
* @see get_content()
*/
operator content_type&(void) { return get_content(); }
};
}
#endif /* __KONFORKA_BASIC_WRAPPER_H */
/* vim:set ft=cpp: */
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