net.sf.saxon.functions

Class CurrentMergeKey

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.CurrentMergeKey

All Implemented Interfaces:

Callable, Function, GroundedValue, Item, Sequence

public class CurrentMergeKey
extends SystemFunction
implements Callable

Implements the XSLT function current-grouping-key()

Constructor Summary

Constructors

Constructor and Description
CurrentMergeKey()

Method Summary

Modifier and Type	Method and Description
Sequence	call(XPathContext context, Sequence[] arguments) Evaluate the expression
MergeInstr	getControllingInstruction() Get the innermost containing xsl:merge instruction, if there is one
SequenceIterator	iterate(XPathContext c) 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
void	setControllingInstruction(MergeInstr instruction) Set the containing xsl:for-each-group instruction, if there is one

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

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

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

atomize, deepEquals, effectiveBooleanValue, getAnnotations, getStringValue, getStringValueCS, isArray, isMap, makeNewContext, simplify, typeCheck

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

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

Methods inherited from class java.lang.Object

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

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

iterate

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

head

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

getLength, head, itemAt, reduce, subsequence

Constructor Detail

CurrentMergeKey

public CurrentMergeKey()

Method Detail

setControllingInstruction

public void setControllingInstruction(MergeInstr instruction)
                               throws XPathException

Set the containing xsl:for-each-group instruction, if there is one

Parameters:

instruction - the (innermost) containing xsl:for-each-group instruction

Throws:

XPathException - for example if the argument to the function is statically known and is not a valid source name

getControllingInstruction

public MergeInstr getControllingInstruction()

Get the innermost containing xsl:merge instruction, if there is one

Returns:

the innermost containing xsl:merge instruction

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

iterate

public SequenceIterator iterate(XPathContext c)
                         throws XPathException

Evaluate the expression

Throws:

XPathException

call

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

Evaluate the expression

Specified by:

call in interface Callable

Specified by:

call in interface Function

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