Package net.sf.saxon.expr.instruct

Class OriginalFunction

java.lang.Object

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.expr.instruct.OriginalFunction

All Implemented Interfaces:

Callable, ContextOriginator, FunctionItem, GroundedValue, Item, Sequence

public class OriginalFunction
extends AbstractFunction
implements FunctionItem, ContextOriginator

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

Constructor Summary

Constructors

Constructor	Description
OriginalFunction(Component component)

Method Summary

Modifier and Type	Method	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
Component	getComponent()
java.lang.String	getContainingPackageName()	Get the name of the package containing the function
java.lang.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, deepEqual40, deepEquals, effectiveBooleanValue, getAnnotations, getOperandRoles, getUnicodeStringValue, isArray, isMap, isTrustedResultType, makeNewContext, simplify, toShortString, typeCheck

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.FunctionItem

deepEqual40, deepEquals, getAnnotations, getGenre, getOperandRoles, isArray, isMap, isSequenceVariadic, isTrustedResultType, makeNewContext, toShortString

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

asIterable, concatenate, containsNode, effectiveBooleanValue, materialize

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

atomize, getLength, getStringValue, getUnicodeStringValue, head, isStreamed, itemAt, iterate, reduce, subsequence

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

makeRepeatable

Constructor Detail

OriginalFunction

public OriginalFunction(Component component)

Method Detail

call

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

Invoke the function

Specified by:

call in interface Callable

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 FunctionItem

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 FunctionItem

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 FunctionItem

Returns:

the number of arguments in the function signature

getDescription

public java.lang.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 FunctionItem

Returns:

a description of the function for use in error messages

getContainingPackageName

public java.lang.String getContainingPackageName()

Get the name of the package containing the function

Returns:

the name of the package containing the function

getComponent

public Component getComponent()

export

public void export(ExpressionPresenter out)
            throws XPathException

Description copied from class: AbstractFunction

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

Specified by:

export in interface FunctionItem

Overrides:

export in class AbstractFunction

Parameters:

out - the destination for the information

Throws:

XPathException - if things go wrong