Class FilterIterator.NonNumeric

java.lang.Object
net.sf.saxon.expr.FilterIterator
net.sf.saxon.expr.FilterIterator.NonNumeric
All Implemented Interfaces:
Closeable, 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
  • Constructor Details

    • 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 filtered
      filter - the filter expression
      context - the current context (for evaluating the filter expression as a whole). A new context will be created to evaluate the predicate.
  • Method Details

    • matches

      protected boolean matches() throws XPathException
      Determine whether the context item matches the filter predicate
      Overrides:
      matches in class FilterIterator
      Returns:
      true if the context item matches
      Throws:
      XPathException - if an error occurs evaluating the match