xref: /aoo4110/main/framework/inc/helper/ocomponentenumeration.hxx (revision b1cdbd2c)

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#ifndef __FRAMEWORK_HELPER_OCOMPONENTENUMERATION_HXX_
#define __FRAMEWORK_HELPER_OCOMPONENTENUMERATION_HXX_

//_________________________________________________________________________________________________________________
//	my own includes
//_________________________________________________________________________________________________________________

#ifndef __FRAMEWORK_OMUTEXMEMBER_HXX_
#include <threadhelp/threadhelpbase.hxx>
#endif
#include <macros/generic.hxx>
#include <macros/xinterface.hxx>
#include <macros/xtypeprovider.hxx>
#include <macros/debug.hxx>
#include <general.h>

//_________________________________________________________________________________________________________________
//	interface includes
//_________________________________________________________________________________________________________________
#include <com/sun/star/lang/XEventListener.hpp>
#include <com/sun/star/container/XEnumeration.hpp>
#include <com/sun/star/lang/XComponent.hpp>

//_________________________________________________________________________________________________________________
//	other includes
//_________________________________________________________________________________________________________________
#include <cppuhelper/implbase2.hxx>

//_________________________________________________________________________________________________________________
//	namespace
//_________________________________________________________________________________________________________________

namespace framework{

//_________________________________________________________________________________________________________________
//	exported const
//_________________________________________________________________________________________________________________

//_________________________________________________________________________________________________________________
//	exported definitions
//_________________________________________________________________________________________________________________

/*-************************************************************************************************************//**
	@short			implement a helper for a oneway enumeration of components
	@descr			You can step during this list only for one time! Its a snapshot.
					Don't forget to release the reference. You are the owner of an instance of this implementation.
					You cant use this as a baseclass. Please use it as a dynamical object for return.

	@implements		XInterface
					XTypeProvider
					XEventListener
					XEnumeration

	@base			ThreadHelpBase
					OWeakObject

	@devstatus		ready to use
	@threadsafe		yes
*//*-*************************************************************************************************************/

class OComponentEnumeration	:	public ThreadHelpBase               ,
								public ::cppu::WeakImplHelper2< ::com::sun::star::container::XEnumeration,::com::sun::star::lang::XEventListener >
{
	//-------------------------------------------------------------------------------------------------------------
	//	public methods
	//-------------------------------------------------------------------------------------------------------------

	public:

		//---------------------------------------------------------------------------------------------------------
		//	constructor / destructor
		//---------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		constructor to initialize this enumeration
			@descr		An enumeration is a list with oneway-access! You can get every member only for one time.
						This method allow to initialize this oneway list with values.

			@seealso	-

			@param		"seqComponents" is a sequence of interfaces, which are components.
			@return		-

			@onerror	Do nothing and reset this object to default with an empty list.
		*//*-*****************************************************************************************************/

	 	OComponentEnumeration( const css::uno::Sequence< css::uno::Reference< css::lang::XComponent > >& seqComponents );

		//---------------------------------------------------------------------------------------------------------
		//	XEventListener
		//---------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		last chance to release all references and free memory
			@descr		This method is called, if the enumeration is used completly and has no more elements.
						Then we must destroy ouer list and release all references to other objects.

			@seealso	interface XEventListener

			@param		"aEvent" describe the source of this event.
			@return		-

			@onerror	-
		*//*-*****************************************************************************************************/

		virtual void SAL_CALL disposing( const css::lang::EventObject& aEvent ) throw( css::uno::RuntimeException );

		//---------------------------------------------------------------------------------------------------------
		//	XEnumeration
		//---------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		check count of accessible elements of enumeration
			@descr		You can call this method to get information about accessible elements in future.
						Elements you have already getted are not accessible!

			@seealso	interface XEnumeration

			@param		-
			@return		sal_True  = if more elements accessible<BR>
						sal_False = other way

			@onerror	sal_False<BR>
						(List is emtpy and there no accessible elements ...)
		*//*-*****************************************************************************************************/

    	virtual sal_Bool SAL_CALL hasMoreElements() throw( css::uno::RuntimeException );

		/*-****************************************************************************************************//**
			@short		give the next element, if some exist
			@descr		If a call "hasMoreElements()" return true, you can get the next element of list.

			@seealso	interface XEnumeration

			@param		-
			@return		A Reference to a component, safed in an Any-structure.

			@onerror	If end of enumeration is arrived or there are no elements in list => a NoSuchElementException is thrown.
		*//*-*****************************************************************************************************/

    	virtual css::uno::Any SAL_CALL nextElement() throw(	css::container::NoSuchElementException	,
							 								css::lang::WrappedTargetException		,
															css::uno::RuntimeException				);

	//-------------------------------------------------------------------------------------------------------------
	//	protected methods
	//-------------------------------------------------------------------------------------------------------------

	protected:

		/*-****************************************************************************************************//**
			@short		standard destructor
			@descr		This method destruct an instance of this class and clear some member.
						We make it protected, because its not supported to use this class as normal instance!
						You must create it dynamical in memory and use a pointer.

			@seealso	-

			@param		-
			@return		-

			@onerror	-
		*//*-*****************************************************************************************************/

		virtual	~OComponentEnumeration();

		/*-****************************************************************************************************//**
			@short		reset instance to default values

			@descr		There are two ways to delete an instance of this class.<BR>
						1) delete with destructor<BR>
						2) dispose from parent or factory ore ...<BR>
						This method do the same for both ways! It free used memory and release references ...

			@seealso	method dispose()
			@seealso	destructor ~TaskEnumeration()

			@param		-

			@return		-

			@onerror	-
		*//*-*****************************************************************************************************/

		virtual void impl_resetObject();

	//-------------------------------------------------------------------------------------------------------------
	//	private methods
	//-------------------------------------------------------------------------------------------------------------

	private:

	//-------------------------------------------------------------------------------------------------------------
	//	debug methods
	//	(should be private everyway!)
	//-------------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		debug-method to check incoming parameter of some other mehods of this class
			@descr		The following methods are used to check parameters for other methods
						of this class. The return value is used directly for an ASSERT(...).

			@seealso	ASSERT in implementation!

			@param		references to checking variables
			@return		sal_False on invalid parameter<BR>
						sal_True  otherway

			@onerror	-
		*//*-*****************************************************************************************************/

	#ifdef ENABLE_ASSERTIONS

	private:

		static sal_Bool impldbg_checkParameter_OComponentEnumerationCtor	(	const	css::uno::Sequence< css::uno::Reference< css::lang::XComponent > >&	seqComponents	);
		static sal_Bool impldbg_checkParameter_disposing					(	const	css::lang::EventObject&			   									aEvent			);

	#endif	// #ifdef ENABLE_ASSERTIONS

	//-------------------------------------------------------------------------------------------------------------
	//	variables
	//	(should be private everyway!)
	//-------------------------------------------------------------------------------------------------------------

	private:

		sal_uInt32																m_nPosition			;	/// current position in enumeration
		css::uno::Sequence< css::uno::Reference< css::lang::XComponent > >		m_seqComponents		;	/// list of current components

};		//	class OComponentEnumeration

}		//	namespace framework

#endif	//	#ifndef __FRAMEWORK_HELPER_OCOMPONENTENUMERATION_HXX_