public class HighestOrLowest extends GeneralFilterFunction.GeneralFilterFunctionCall
The first argument is a sequence S, the second a function F (defaulting to fn:data). The function returns the item or items I in the input sequence S for which F(I) has its highest/lowest value. It is not possible to specify a collation; the default collation is used when comparing strings.
|Constructor and Description|
|Modifier and Type||Method and Description|
Evaluate this function call at run-time
effectiveBooleanValue, getContainer, getDefinition, getExecutable, rewrite, setDefinition
public Sequence call(XPathContext context, Sequence arguments) throws XPathException
context- The XPath dynamic evaluation context
arguments- The values of the arguments to the function call. Each argument value (which is in general a sequence) is supplied in the form of an iterator over the items in the sequence. If required, the supplied sequence can be materialized by calling, for example,
new SequenceExtent(arguments[i]). If the argument is always a singleton, then the single item may be obtained by calling
arguments[i].next(). The implementation is not obliged to read all the items in each
SequenceIteratorif they are not required to compute the result; but if any SequenceIterator is not read to completion, it is good practice to call its close() method.
SingletonIterator. If the result is an empty sequence, the method should return
XPathException- if a dynamic error occurs during evaluation of the function. The Saxon run-time code will add information about the error location.
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