Package net.sf.saxon.expr
Class FilterIterator.NonNumeric
- java.lang.Object
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- net.sf.saxon.expr.FilterIterator
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- net.sf.saxon.expr.FilterIterator.NonNumeric
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- All Implemented Interfaces:
java.io.Closeable
,java.lang.AutoCloseable
,SequenceIterator
- Enclosing class:
- FilterIterator
public static final class FilterIterator.NonNumeric extends FilterIterator
Subclass to handle the common special case where it is statically known that the filter cannot return a numeric value
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Nested Class Summary
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Nested classes/interfaces inherited from class net.sf.saxon.expr.FilterIterator
FilterIterator.NonNumeric
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Field Summary
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Fields inherited from class net.sf.saxon.expr.FilterIterator
base, filter, filterContext
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Constructor Summary
Constructors Constructor Description NonNumeric(SequenceIterator base, Expression filter, XPathContext context)
Create a CompiledFilterIterator for the situation where it is known that the filter expression will never evaluate to a number value.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected boolean
matches()
Determine whether the context item matches the filter predicate-
Methods inherited from class net.sf.saxon.expr.FilterIterator
close, getNextMatchingItem, next, setSequence, testPredicateValue
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Constructor Detail
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NonNumeric
public NonNumeric(SequenceIterator base, Expression filter, XPathContext context)
Create a CompiledFilterIterator for the situation where it is known that the filter expression will never evaluate to a number value. For this case we can simply use the effective boolean value of the predicate- Parameters:
base
- iterator over the sequence to be filteredfilter
- the filter expressioncontext
- the current context (for evaluating the filter expression as a whole). A new context will be created to evaluate the predicate.
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Method Detail
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matches
protected boolean matches() throws XPathException
Determine whether the context item matches the filter predicate- Overrides:
matches
in classFilterIterator
- Returns:
- true if the context item matches
- Throws:
XPathException
- if an error occurs evaluating the match
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