net.sf.saxon.expr.instruct

Class OriginalFunction

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.expr.instruct.OriginalFunction

All Implemented Interfaces:

PullEvent, Callable, ContextOriginator, Function, GroundedValue, Item, Sequence

public class OriginalFunction
extends AbstractFunction
implements Function, ContextOriginator

This class represents a function invoked using xsl:original from within an xs:override element.

Constructor Summary

Constructors

Constructor and Description
OriginalFunction(Component<? extends UserFunction> component)

Method Summary

Methods

Modifier and Type	Method and Description
Sequence	call(XPathContext context, Sequence[] args) Invoke the function
void	export(ExpressionPresenter out) Output information about this function item to the diagnostic explain() output
int	getArity() Get the arity of the function
String	getContainingPackageName() Get the name of the package containing the function
String	getDescription() Get a description of this function for use in error messages.
FunctionItemType	getFunctionItemType() Get the item type of the function item
StructuredQName	getFunctionName() Get the name of the function, or null if it is anonymous

Methods inherited from class net.sf.saxon.functions.AbstractFunction

atomize, deepEquals, effectiveBooleanValue, getOperandRoles, getStringValue, getStringValueCS, isArray, isMap, optimize, simplify, typeCheck

Methods inherited from class net.sf.saxon.om.AbstractItem

getLength, head, itemAt, iterate, reduce, subsequence

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.sf.saxon.om.Function

deepEquals, getOperandRoles, isArray, isMap, iterate

Methods inherited from interface net.sf.saxon.om.Item

atomize, getStringValue, getStringValueCS, head

Methods inherited from interface net.sf.saxon.om.GroundedValue

effectiveBooleanValue, getLength, getStringValue, getStringValueCS, head, itemAt, reduce, subsequence

Constructor Detail

OriginalFunction

public OriginalFunction(Component<? extends UserFunction> component)

Method Detail

call

public Sequence call(XPathContext context,
            Sequence[] args)
              throws XPathException

Invoke the function

Specified by:

call in interface Callable

Specified by:

call in interface Function

Parameters:

context - the XPath dynamic evaluation context

args - the actual arguments to be supplied

Returns:

the result of invoking the function

Throws:

XPathException - if a dynamic error occurs within the function

getFunctionItemType

public FunctionItemType getFunctionItemType()

Get the item type of the function item

Specified by:

getFunctionItemType in interface Function

Returns:

the function item's type

getFunctionName

public StructuredQName getFunctionName()

Get the name of the function, or null if it is anonymous

Specified by:

getFunctionName in interface Function

Returns:

the function name, or null for an anonymous inline function

getArity

public int getArity()

Get the arity of the function

Specified by:

getArity in interface Function

Returns:

the number of arguments in the function signature

getDescription

public String getDescription()

Get a description of this function for use in error messages. For named functions, the description is the function name (as a lexical QName). For others, it might be, for example, "inline function", or "partially-applied ends-with function".

Specified by:

getDescription in interface Function

Returns:

a description of the function for use in error messages

getContainingPackageName

public String getContainingPackageName()

Get the name of the package containing the function

export

public void export(ExpressionPresenter out)

Description copied from class: AbstractFunction

Output information about this function item to the diagnostic explain() output

Specified by:

export in interface Function

Overrides:

export in class AbstractFunction