net.sf.saxon.functions

Class TreatFn.ZeroOrOne

java.lang.Object

net.sf.saxon.om.AbstractItem

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.TreatFn

net.sf.saxon.functions.TreatFn.ZeroOrOne

All Implemented Interfaces:

Callable, Function, GroundedValue, Item, Sequence

Enclosing class:

TreatFn

public static class TreatFn.ZeroOrOne
extends TreatFn

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.functions.TreatFn

TreatFn.ExactlyOne, TreatFn.OneOrMore, TreatFn.ZeroOrOne

Constructor Summary

Constructors

Constructor and Description
ZeroOrOne()

Method Summary

Modifier and Type	Method and Description
java.lang.String	getErrorCodeForTypeErrors() Return the error code to be used for type errors
int	getRequiredCardinality()

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

call, getStreamerName, makeRoleDiagnostic

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

dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getCompilerName, getContextNode, getDescription, getDetails, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, importAttributes, isTrustedResultType, makeCall, makeFunction, makeFunctionCall, 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

ZeroOrOne

public ZeroOrOne()

Method Detail

getRequiredCardinality

public int getRequiredCardinality()

Specified by:

getRequiredCardinality in class TreatFn

getErrorCodeForTypeErrors

public java.lang.String getErrorCodeForTypeErrors()

Description copied from class: TreatFn

Return the error code to be used for type errors

Specified by:

getErrorCodeForTypeErrors in class TreatFn

Returns:

the error code to be used for type errors in the function call. Normally XPTY0004, but different codes are used for functions such as exactly-one()