net.sf.saxon.expr.flwor

Class CountClause

java.lang.Object

net.sf.saxon.expr.flwor.Clause

net.sf.saxon.expr.flwor.CountClause

public class CountClause
extends Clause

A "count" clause in a FLWOR expression

Field Summary

Fields inherited from class net.sf.saxon.expr.flwor.Clause

COUNT, FOR, GROUPBYCLAUSE, LET, ORDERBYCLAUSE, TRACE, WHERE, WINDOW

Constructor Summary

Constructors

Constructor and Description
CountClause()

Method Summary

Modifier and Type	Method and Description
void	addToPathMap(PathMap pathMap, PathMap.PathMapNodeSet pathMapNodeSet) Collect information about the navigation paths followed by this clause, for document projection purposes
CountClause	copy(FLWORExpression flwor, RebindingMap rebindings) Create a copy of this clause
void	explain(ExpressionPresenter out) Diagnostic print of expression structure.
int	getClauseKey() Get a keyword identifying what kind of clause this is
TuplePull	getPullStream(TuplePull base, XPathContext context) Get a tuple stream that implements the functionality of this clause, taking its input from another tuple stream which this clause modifies
TuplePush	getPushStream(TuplePush destination, XPathContext context) Get a push-mode tuple stream that implements the functionality of this clause, supplying its output to another tuple stream
LocalVariableBinding	getRangeVariable()
LocalVariableBinding[]	getRangeVariables() Get the number of variables bound by this clause
void	processOperands(OperandProcessor processor) Process the subexpressions of this clause
void	setRangeVariable(LocalVariableBinding binding)
java.lang.String	toString()

Methods inherited from class net.sf.saxon.expr.flwor.Clause

containsNonInlineableVariableReference, gatherVariableReferences, getConfiguration, getLocation, getPackageData, isRepeated, optimize, refineVariableType, setLocation, setPackageData, setRepeated, toShortString, typeCheck

Methods inherited from class java.lang.Object

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

Constructor Detail

CountClause

public CountClause()

Method Detail

getClauseKey

public int getClauseKey()

Description copied from class: Clause

Get a keyword identifying what kind of clause this is

Specified by:

getClauseKey in class Clause

Returns:

the kind of clause

copy

public CountClause copy(FLWORExpression flwor,
                        RebindingMap rebindings)

Description copied from class: Clause

Create a copy of this clause

Specified by:

copy in class Clause

Parameters:

flwor - the new FLWORExpression to contain the copied clause

Returns:

the copied clause

setRangeVariable

public void setRangeVariable(LocalVariableBinding binding)

getRangeVariable

public LocalVariableBinding getRangeVariable()

getRangeVariables

public LocalVariableBinding[] getRangeVariables()

Get the number of variables bound by this clause

Overrides:

getRangeVariables in class Clause

Returns:

the number of variable bindings

getPullStream

public TuplePull getPullStream(TuplePull base,
                               XPathContext context)

Get a tuple stream that implements the functionality of this clause, taking its input from another tuple stream which this clause modifies

Specified by:

getPullStream in class Clause

Parameters:

base - the input tuple stream

context -

Returns:

the output tuple stream

getPushStream

public TuplePush getPushStream(TuplePush destination,
                               XPathContext context)

Get a push-mode tuple stream that implements the functionality of this clause, supplying its output to another tuple stream

Specified by:

getPushStream in class Clause

Parameters:

destination - the output tuple stream

context -

Returns:

the push tuple stream that implements the functionality of this clause of the FLWOR expression

processOperands

public void processOperands(OperandProcessor processor)
                     throws XPathException

Process the subexpressions of this clause

Specified by:

processOperands in class Clause

Parameters:

processor - the expression processor used to process the subexpressions

Throws:

XPathException - if any error is detected

addToPathMap

public void addToPathMap(PathMap pathMap,
                         PathMap.PathMapNodeSet pathMapNodeSet)

Description copied from class: Clause

Collect information about the navigation paths followed by this clause, for document projection purposes

Specified by:

addToPathMap in class Clause

Parameters:

pathMap - the path map in which the data is to be collected

pathMapNodeSet - the path map node set representing the paths to the context item

explain

public void explain(ExpressionPresenter out)
             throws XPathException

Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.

Specified by:

explain in class Clause

Parameters:

out - the expression presenter used to display the structure

Throws:

XPathException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object