Package net.sf.saxon.expr

Class AttributeGetter.AttributeGetterElaborator

java.lang.Object
net.sf.saxon.expr.elab.Elaborator
net.sf.saxon.expr.elab.ItemElaborator
net.sf.saxon.expr.AttributeGetter.AttributeGetterElaborator
Enclosing class:
AttributeGetter
public static class AttributeGetter.AttributeGetterElaborator extends ItemElaborator
Elaborator for an AttributeGetter expression (which gets a named attribute of the context item and returns its value as an untyped atomic value)

  • Constructor Details

    • AttributeGetterElaborator

      public AttributeGetterElaborator()

  • Method Details

    • elaborateForItem

      public ItemEvaluator elaborateForItem()
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression in the form of a Item. This must only be called for expressions whose result has cardinality zero or one.
      Specified by:
      elaborateForItem in class ItemElaborator
      Returns:
      an evaluator for the expression that returns an Item, or null to represent an empty sequence.

    • elaborateForString

      public StringEvaluator elaborateForString(boolean zeroLengthWhenAbsent)
      Get a function that evaluates the underlying expression in the form of a Java string, this being the result of applying fn:string() to the result of the expression; except that if the result of the expression is an empty sequence, the result is "" if zeroLengthWhenAbsent is set, or null otherwise.
      Overrides:
      elaborateForString in class Elaborator
      Parameters:
      zeroLengthWhenAbsent - if true, then when the result of the expression is an empty sequence, the result of the StringEvaluator should be a zero-length string. If false, the return value should be null.
      Returns:
      an evaluator for the expression that returns a string.