Public Types | Public Member Functions
zorba::ExternalFunction Class Reference

The ExternalFunction class serves as the base of subclasses that represent the implementation/body of external functions. More...

#include <zorba/function.h>

Inheritance diagram for zorba::ExternalFunction:
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List of all members.

Public Types

typedef std::vector
< ItemSequence * > 
Arguments_t

Public Member Functions

virtual String getLocalName () const =0
virtual String getURI () const =0
virtual bool isContextual () const =0
virtual ~ExternalFunction ()

Detailed Description

The ExternalFunction class serves as the base of subclasses that represent the implementation/body of external functions.

Instances of ExternalFunction must provide an evaluate method that serves as the implementation of the function. During its evaluation, an external function may or may not need to access the static and/or dynamic context of the invoking XQuery module. If the function implementation does need to access either context, the function is referred to as "contextual"; otherwise, it is "non-contextual".

Examples:

external_functions.cpp.


Member Typedef Documentation

Definition at line 151 of file function.h.


Constructor & Destructor Documentation

virtual zorba::ExternalFunction::~ExternalFunction ( ) [inline, virtual]

Definition at line 154 of file function.h.


Member Function Documentation

virtual String zorba::ExternalFunction::getLocalName ( ) const [pure virtual]
Returns:
The local name of the function QName
virtual String zorba::ExternalFunction::getURI ( ) const [pure virtual]
Returns:
The namespace URI of the function QName
virtual bool zorba::ExternalFunction::isContextual ( ) const [pure virtual]
Returns:
True if the external function is contextual; false otherwise.

Implemented in zorba::ContextualExternalFunction, and zorba::NonContextualExternalFunction.


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