net.sf.saxon.expr
Class FilterIterator.Leading

java.lang.Object
  net.sf.saxon.expr.FilterIterator
      net.sf.saxon.expr.FilterIterator.Leading

All Implemented Interfaces:

SequenceIterator

Enclosing class:

FilterIterator

public static final class FilterIterator.Leading
extends FilterIterator

Subclass to support the extension function saxon:leading, which terminates the iteration at the first item whose predicate is false

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.expr.FilterIterator

FilterIterator.Leading, FilterIterator.NonNumeric

Field Summary

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

GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD

Constructor Summary

FilterIterator.Leading(SequenceIterator base, Expression filter, XPathContext context)
Create a FilterIterate that terminates at the first item for which the predicate evaluates to false

Method Summary

SequenceIterator

getAnother() Get another iterator to return the same nodes

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

current, getProperties, next, position

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterIterator.Leading

public FilterIterator.Leading(SequenceIterator base,
                              Expression filter,
                              XPathContext context)

Create a FilterIterate that terminates at the first item for which the predicate evaluates to false

Parameters:

base - iterator over the sequence to be filtered

filter - the filter expression - always evaluated as a boolean

context - the outer context for the filter expression as a whole; a new context will be created for evaluating the predicate

Method Detail

getAnother

public SequenceIterator getAnother()
                            throws XPathException

Get another iterator to return the same nodes

Specified by:

getAnother in interface SequenceIterator

Overrides:

getAnother in class FilterIterator

Returns:

a SequenceIterator that iterates over the same items, positioned before the first item

Throws:

XPathException - if any error occurs