zorba::ContextualExternalFunction Class Reference

The ContextualExternalFunction class serves as the base of subclasses that represent the implementation of contextual external functions. More...

#include <zorba/function.h>

Inheritance diagram for zorba::ContextualExternalFunction:

Collaboration diagram for zorba::ContextualExternalFunction:

List of all members.

Public Types
typedef std::vector < ItemSequence * >	Arguments_t
Public Member Functions
virtual ItemSequence_t	evaluate (const Arguments_t &, const StaticContext *, const DynamicContext *) const =0
virtual String	getLocalName () const =0
virtual String	getURI () const =0
bool	isContextual () const
virtual	~ContextualExternalFunction ()

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Detailed Description

The ContextualExternalFunction class serves as the base of subclasses that represent the implementation of contextual external functions.

For each external function, an application must provide a concrete subclass of this class and "store" an instance of the subclass inside an ExternalModule object, as described here.

Examples:

external_functions.cpp.

Definition at line 207 of file function.h.

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Member Typedef Documentation

typedef std::vector<ItemSequence*> zorba::ExternalFunction::Arguments_t [inherited]

Definition at line 151 of file function.h.

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Constructor & Destructor Documentation

virtual zorba::ContextualExternalFunction::~ContextualExternalFunction

(

)

[inline, virtual]

Definition at line 210 of file function.h.

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Member Function Documentation

virtual ItemSequence_t zorba::ContextualExternalFunction::evaluate	(	const Arguments_t &	,
		const StaticContext *	,
		const DynamicContext *
	)		const [pure virtual]

virtual String zorba::ExternalFunction::getLocalName

(

)

const [pure virtual, inherited]

Returns:

The local name of the function QName

virtual String zorba::ExternalFunction::getURI

(

)

const [pure virtual, inherited]

Returns:

The namespace URI of the function QName

bool zorba::ContextualExternalFunction::isContextual

(

)

const [inline, virtual]

Returns:

True if the external function is contextual; false otherwise.

Implements zorba::ExternalFunction.

Definition at line 219 of file function.h.

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

• function.h