com.saxonica.functions.hof
Class CurriedFunction

java.lang.Object
  com.saxonica.functions.hof.AbstractFunctionItem
      com.saxonica.functions.hof.CurriedFunction

All Implemented Interfaces:

PullEvent, FunctionItem, Item, ValueRepresentation

public class CurriedFunction
extends AbstractFunctionItem

A function obtained by currying another function, that is, the result of calling fn:partial-apply

Field Summary

Fields inherited from interface net.sf.saxon.om.ValueRepresentation

EMPTY_VALUE_ARRAY

Constructor Summary

CurriedFunction(FunctionItem targetFunction, ValueRepresentation[] boundValues)
Create a curried function

Method Summary

int	getArity() Get the arity of the function (equal to the number of placeholders)
FunctionItemType	getFunctionItemType(TypeHierarchy th) Get the item type of the function item
StructuredQName	getFunctionName() Get the name of the function, or null if it is anonymous
SequenceIterator	invoke(SequenceIterator[] args, XPathContext context) Invoke the function

Methods inherited from class com.saxonica.functions.hof.AbstractFunctionItem

bind, curry, deepEquals, explain, getStringValue, getStringValueCS, getTypedValue, optimize, simplify, typeCheck

Methods inherited from class java.lang.Object

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

Constructor Detail

CurriedFunction

public CurriedFunction(FunctionItem targetFunction,
                       ValueRepresentation[] boundValues)
                throws XPathException

Create a curried function

Parameters:

targetFunction - the function to be curried

boundValues - the values to which the arguments are to be bound, representing unbound values (placeholders) by null

Throws:

XPathException - if any $boundArg does not exist among the arguments

Method Detail

getFunctionItemType

public FunctionItemType getFunctionItemType(TypeHierarchy th)

Get the item type of the function item

Parameters:

th - the type hierarchy cache

Returns:

the function item's type

getFunctionName

public StructuredQName getFunctionName()

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

Returns:

the function name, or null for an anonymous inline function

getArity

public int getArity()

Get the arity of the function (equal to the number of placeholders)

Returns:

the number of arguments in the function signature

invoke

public SequenceIterator invoke(SequenceIterator[] args,
                               XPathContext context)
                        throws XPathException

Invoke the function

Parameters:

args - the actual arguments to be supplied

context - the XPath dynamic evaluation context

Returns:

the result of invoking the function

Throws:

XPathException