net.sf.saxon.functions

Class Nilled_1

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.Nilled_1

All Implemented Interfaces:

PullEvent, Callable, Function, GroundedValue, Item, Sequence

public class Nilled_1
extends SystemFunction
implements Callable

This class supports the nilled() function

Constructor Summary

Constructors

Constructor and Description
Nilled_1()

Method Summary

Methods

Modifier and Type	Method and Description
ZeroOrOne<BooleanValue>	call(XPathContext context, Sequence[] arguments) Evaluate the expression
static BooleanValue	getNilledProperty(NodeInfo node) Determine whether a node has the nilled property
static boolean	isNilled(NodeInfo node) Determine whether a node is nilled.

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

equals, export, exportAttributes, getArity, getCardinality, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getExpressionCompiler, getFunctionItemType, getFunctionName, getIntegerBounds, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, getStreamingAdjunct, importAttributes, makeCall, makeFunction, makeFunctionCall, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, typeCheckCaller

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

atomize, deepEquals, effectiveBooleanValue, 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, 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

Nilled_1

public Nilled_1()

Method Detail

getNilledProperty

public static BooleanValue getNilledProperty(NodeInfo node)

Determine whether a node has the nilled property

Parameters:

node - the node in question (if null, the function returns null)

Returns:

the value of the nilled accessor. Returns null for any node other than an element node. For an element node, returns true if the element has been validated and has an xsi:nil attribute whose value is true.

isNilled

public static boolean isNilled(NodeInfo node)

Determine whether a node is nilled. Returns true if the value of the nilled property is true; false if the value is false or absent

Parameters:

node - the node to be tested

Returns:

true if the node is nilled

call

public ZeroOrOne<BooleanValue> 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