Package 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
Subclass to support the extension function saxon:leading, which terminates
the iteration at the first item whose predicate is false
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Nested Class Summary
Nested classes/interfaces inherited from class net.sf.saxon.expr.FilterIterator
FilterIterator.Leading, FilterIterator.NonNumeric
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Field Summary
Fields inherited from class net.sf.saxon.expr.FilterIterator
base, filter, filterContext
Fields inherited from interface net.sf.saxon.om.SequenceIterator
GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD
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Constructor Summary
ConstructorsConstructorDescriptionLeading
(SequenceIterator base, Expression filter, XPathContext context) Create a FilterIterate that terminates at the first item for which the predicate evaluates to false -
Method Summary
Methods inherited from class net.sf.saxon.expr.FilterIterator
close, current, getProperties, next, position
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Constructor Details
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Leading
Create a FilterIterate that terminates at the first item for which the predicate evaluates to false- Parameters:
base
- iterator over the sequence to be filteredfilter
- the filter expression - always evaluated as a booleancontext
- the outer context for the filter expression as a whole; a new context will be created for evaluating the predicate
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Method Details
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matches
Determine whether the context item matches the filter predicate- Overrides:
matches
in classFilterIterator
- Returns:
- true if the context item matches
- Throws:
XPathException
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getNextMatchingItem
Get the next node that matches the filter predicate if there is one- Overrides:
getNextMatchingItem
in classFilterIterator
- Returns:
- the next item that matches the predicate
- Throws:
XPathException
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getAnother
Get another iterator to return the same nodes- Specified by:
getAnother
in interfaceSequenceIterator
- Overrides:
getAnother
in classFilterIterator
- Returns:
- a SequenceIterator that iterates over the same items, positioned before the first item
- Throws:
XPathException
- if any error occurs
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