Package net.sf.saxon.expr

Class ListCastableFunction

java.lang.Object

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.expr.ListConstructorFunction

net.sf.saxon.expr.ListCastableFunction

All Implemented Interfaces:

Callable, FunctionItem, GroundedValue, Item, Sequence

public class ListCastableFunction
extends ListConstructorFunction

A function item representing a castability test for a list type

Field Summary

Fields inherited from class net.sf.saxon.expr.ListConstructorFunction

allowEmpty, memberType, nsResolver, targetType

Constructor Summary

Constructors

Constructor	Description
ListCastableFunction(ListType targetType, NamespaceResolver resolver, boolean allowEmpty)	Create the constructor function.

Method Summary

Modifier and Type	Method	Description
BooleanValue	call(XPathContext context, Sequence[] args)	Invoke the function
FunctionItemType	getFunctionItemType()	Get the item type of the function item
StructuredQName	getFunctionName()	Get the name of the function, or null if it is anonymous

Methods inherited from class net.sf.saxon.expr.ListConstructorFunction

getArity, getDescription, getMemberType, getTargetType, isAllowEmpty

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

atomize, deepEqual40, deepEquals, effectiveBooleanValue, export, getAnnotations, getOperandRoles, getUnicodeStringValue, isArray, isMap, isTrustedResultType, makeNewContext, simplify, toShortString, typeCheck

Methods inherited from class java.lang.Object

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

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

getGenre, isSequenceVariadic

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

ListCastableFunction

public ListCastableFunction(ListType targetType,
                            NamespaceResolver resolver,
                            boolean allowEmpty)
                     throws MissingComponentException

Create the constructor function.

Parameters:

targetType - the type to which the function will convert its input

resolver - namespace resolver for use if the target type is namespace-sensitive

allowEmpty - if the operand can be an empty sequence

Throws:

MissingComponentException - if the item type has not been declared

Method Detail

getFunctionItemType

public FunctionItemType getFunctionItemType()

Get the item type of the function item

Specified by:

getFunctionItemType in interface FunctionItem

Overrides:

getFunctionItemType in class ListConstructorFunction

Returns:

the function item's type

getFunctionName

public StructuredQName getFunctionName()

Get the name of the function, or null if it is anonymous

Specified by:

getFunctionName in interface FunctionItem

Overrides:

getFunctionName in class ListConstructorFunction

Returns:

the function name, or null for an anonymous inline function

call

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

Invoke the function

Specified by:

call in interface Callable

Overrides:

call in class ListConstructorFunction

Parameters:

context - the XPath dynamic evaluation context

args - the actual arguments to be supplied

Returns:

the result of invoking the function

Throws:

XPathException - if a dynamic error occurs within the function