Package net.sf.saxon.functions

Class CurrentGroupingKey

java.lang.Object

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.ContextAccessorFunction

net.sf.saxon.functions.CurrentGroupingKey

All Implemented Interfaces:

Callable, FunctionItem, GroundedValue, Item, Sequence

public class CurrentGroupingKey
extends ContextAccessorFunction

Implements the XSLT function current-grouping-key()

Constructor Summary

Constructors

Constructor	Description
CurrentGroupingKey()

Method Summary

Modifier and Type	Method	Description
FunctionItem	bindContext(XPathContext context)	Bind context information to appear as part of the function's closure.
Sequence	call(XPathContext context, Sequence[] arguments)	Evaluate the expression
Expression	makeFunctionCall(Expression... arguments)	Make an expression that either calls this function, or that is equivalent to a call on this function

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

dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getContextNode, getDescription, getDetails, getElaborator, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, getStreamerName, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeFunction40, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller

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

atomize, deepEqual40, deepEquals, effectiveBooleanValue, getAnnotations, getUnicodeStringValue, isArray, isMap, makeNewContext, simplify, typeCheck

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

getGenre

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

asIterable, concatenate, containsNode, materialize

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

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

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

makeRepeatable

Constructor Detail

CurrentGroupingKey

public CurrentGroupingKey()

Method Detail

makeFunctionCall

public Expression makeFunctionCall(Expression... arguments)

Make an expression that either calls this function, or that is equivalent to a call on this function

Overrides:

makeFunctionCall in class SystemFunction

Parameters:

arguments - the supplied arguments to the function call

Returns:

either a function call on this function, or an expression that delivers the same result

bindContext

public FunctionItem bindContext(XPathContext context)
                         throws XPathException

Description copied from class: ContextAccessorFunction

Bind context information to appear as part of the function's closure. If this method has been called, the supplied context will be used in preference to the context at the point where the function is actually called.

Specified by:

bindContext in class ContextAccessorFunction

Parameters:

context - the context to which the function applies. Must not be null.

Throws:

XPathException

call

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

Evaluate the expression

Specified by:

call in interface Callable

Overrides:

call in class ContextAccessorFunction

Parameters:

context - the dynamic evaluation context

arguments - the values of the arguments, supplied as SequenceIterators

Returns:

the result of the evaluation, in the form of a SequenceIterator

Throws:

XPathException - if a dynamic error occurs during the evaluation of the expression