KCal::ComparisonVisitor Class Reference

#include <comparisonvisitor.h>

Inheritance diagram for KCal::ComparisonVisitor:

Public Member Functions
	ComparisonVisitor ()
virtual	~ComparisonVisitor ()
bool	compare (IncidenceBase *incidence, const IncidenceBase *reference)
virtual bool	visit (Event *event)
virtual bool	visit (Todo *todo)
virtual bool	visit (Journal *journal)
virtual bool	visit (FreeBusy *freebusy)
Public Member Functions inherited from KCal::IncidenceBase::Visitor
virtual	~Visitor ()
virtual bool	visit (Event *)
virtual bool	visit (Todo *)
virtual bool	visit (Journal *)
virtual bool	visit (FreeBusy *)

Additional Inherited Members
Protected Member Functions inherited from KCal::IncidenceBase::Visitor
	Visitor ()

Detailed Description

Helper for type correct comparison of incidences via pointers.

This class provides a way of correctly comparing one incidence to another, given two IncidenceBase derived pointers. It effectively provides a virtual comparison method which first type checks the two pointers to ensure they reference the same incidence type, before performing the comparison.

Usage example:

KCal::Incidence *incidence;          // assume this is set somewhere else
KCal::Incidence *referenceIncidence; // assume this is set somewhere else
 
KCal::ComparisonVisitor visitor;
 
// compare
if ( visitor.compare( incidence, referenceIncidence ) ) {
  // incidence and referenceIncidence point to identical incidences
}

Author

Ingo Klöcker kloec.nosp@m.ker@.nosp@m.kde.o.nosp@m.rg

Definition at line 50 of file comparisonvisitor.h.

Constructor & Destructor Documentation

ComparisonVisitor()

ComparisonVisitor::ComparisonVisitor

(

)

Creates a visitor instance.

Definition at line 37 of file comparisonvisitor.cpp.

~ComparisonVisitor()

ComparisonVisitor::~ComparisonVisitor ( )

virtual

Destroys the instance.

Definition at line 41 of file comparisonvisitor.cpp.

Member Function Documentation

compare()

bool ComparisonVisitor::compare	(	IncidenceBase *	incidence,
		const IncidenceBase *	reference
	)

Compares the incidence referenced by incidence to the incidence referenced by reference.

Returns true, if the incidence referenced by incidence is identical to the incidence referenced by reference. Also returns true, if incidence and reference are both 0.

Basically it is a virtual equivalent of

*incidence == *reference

Parameters

incidence	pointer to the incidence to compare with the reference incidence
reference	pointer to the reference incidence

Returns

true if the two incidences are identical or both 0

Definition at line 46 of file comparisonvisitor.cpp.

visit() [1/4]

bool ComparisonVisitor::visit ( Event *  event )

virtual

Compares the event referenced by event to the incidence passed to compare().

Returns

true if the event is identical to the reference incidence

Reimplemented from KCal::IncidenceBase::Visitor.

Definition at line 57 of file comparisonvisitor.cpp.

visit() [2/4]

bool ComparisonVisitor::visit ( FreeBusy *  freebusy )

virtual

Compares the freebusy object referenced by freebusy to the incidence passed to compare().

Returns

true if the freebusy object is identical to the reference incidence

Reimplemented from KCal::IncidenceBase::Visitor.

Definition at line 96 of file comparisonvisitor.cpp.

visit() [3/4]

bool ComparisonVisitor::visit ( Journal *  journal )

virtual

Compares the journal referenced by journal to the incidence passed to compare().

Returns

true if the journal is identical to the reference incidence

Reimplemented from KCal::IncidenceBase::Visitor.

Definition at line 83 of file comparisonvisitor.cpp.

visit() [4/4]

bool ComparisonVisitor::visit ( Todo *  todo )

virtual

Compares the todo referenced by todo to the incidence passed to compare().

Returns

true if the todo is identical to the reference incidence

Reimplemented from KCal::IncidenceBase::Visitor.

Definition at line 70 of file comparisonvisitor.cpp.

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

• comparisonvisitor.h
• comparisonvisitor.cpp