CallableExpression (saxon JavaDoc)

All Known Implementing Classes:

Adjust, ArithmeticExpression10, Average, BaseURI, BooleanFn, CodepointEqual, Collection, Compare, Contains, CurrentDateTime, CurrentGroup, CurrentGroupingKey, DeepEqual, DistinctValues, Doc, DocumentFn, DocumentUriFn, ElementAvailable, Error, EscapeURI, FormatDate, FormatNumber, FunctionArity, FunctionAvailable, FunctionName, GeneralComparison, GeneralComparison10, GeneralComparison20, Id, Idref, IndexOf, InScopePrefixes, Insert, IntegratedFunctionCall, Lang, NamespaceForPrefix, Nilled, NormalizeUnicode, Remove, Replace, ResolveQName, ResolveURI, Reverse, SimpleExpression, StringToCodepoints, Subsequence, SystemProperty, Tokenize, Trace, TreatFn, TypeAvailable, UnparsedEntity, UnparsedText, UnparsedTextAvailable, UnparsedTextLines, UriCollection, XPathFunctionCall
```
public interface CallableExpression
```
A generic interface for calling expressions by supplying the values of their subexpressions

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`SequenceIterator<? extends Item>`	`call(SequenceIterator<? extends Item>[] arguments, XPathContext context)`	Evaluate the expression
`Expression[]`	`getArguments()`	Get the subexpressions (arguments to this expression)

- Method Detail
  - getArguments
```
Expression[] getArguments()
```
    Get the subexpressions (arguments to this expression)
    
    Returns:
    
    the arguments, as an array
  - call
```
SequenceIterator<? extends Item> call(SequenceIterator<? extends Item>[] arguments,
                                      XPathContext context)
                               throws XPathException
```
    Evaluate the expression
    
    Parameters:
    
    arguments - the values of the arguments, supplied as SequenceIterators
    
    context - the dynamic evaluation context
    
    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