Class SefFunction

java.lang.Object

net.sf.saxon.functions.AbstractFunction

net.sf.saxon.functions.SystemFunction

net.sf.saxon.functions.registry.SefFunction

All Implemented Interfaces:

Callable, Function, GroundedValue, Item, Sequence

Direct Known Subclasses:

XPath40FunctionSet.HighestOrLowest

public class SefFunction
extends SystemFunction

Represents a system function whose implementation is written in XSLT, and which is implemented here by loading the pre-compiled code from a system SEF file.

Field Summary

Fields

Modifier and Type	Field	Description
protected SymbolicName.F	functionAlias
protected StylesheetPackage	pack

Constructor Summary

Constructors

Constructor	Description
SefFunction()

Method Summary

Modifier and Type	Method	Description
Sequence	call(XPathContext context, Sequence[] args)	Invoke the function
protected Sequence	callFunction(XPathContext context, SymbolicName.F name, Sequence[] args)
Expression	makeFunctionCall(Expression... arguments)	Make an expression that either calls this function, or that is equivalent to a call on this function
void	setDetails(BuiltInFunctionSet.Entry entry)	Set the details of this type of function

Methods inherited from class 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, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeOptimizedFunctionCall, resultIfEmpty, setArity, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller

Methods inherited from class AbstractFunction

atomize, deepEquals, effectiveBooleanValue, getAnnotations, getSerialNumber, getUnicodeStringValue, isArray, isMap, makeNewContext, simplify, typeCheck

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Function

getGenre

Methods inherited from interface GroundedValue

asIterable, concatenate, containsNode, materialize

Methods inherited from interface Item

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

Methods inherited from interface Sequence

makeRepeatable

Field Details

functionAlias

protected SymbolicName.F functionAlias

pack

protected StylesheetPackage pack

Constructor Details

SefFunction

public SefFunction()

Method Details

setDetails

public void setDetails(BuiltInFunctionSet.Entry entry)

Set the details of this type of function

Overrides:

setDetails in class SystemFunction

Parameters:

entry - information giving details of the function signature and other function properties

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

callFunction

protected Sequence callFunction(XPathContext context,
 SymbolicName.F name,
 Sequence[] args)
                         throws XPathException

Throws:

XPathException

call

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

Invoke the function

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