Package net.sf.saxon.expr

Class Literal.LiteralElaborator

java.lang.Object
net.sf.saxon.expr.elab.Elaborator
net.sf.saxon.expr.elab.PullElaborator
net.sf.saxon.expr.Literal.LiteralElaborator
Enclosing class:
Literal
public static class Literal.LiteralElaborator extends PullElaborator
Elaborator for a literal.

Evaluators are supplied for evaluation in pull, push, and singleton mode, as well as boolean evaluation

  • Constructor Details

    • LiteralElaborator

      public LiteralElaborator()

  • Method Details

    • eagerly

      public SequenceEvaluator eagerly()
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression eagerly
      Overrides:
      eagerly in class PullElaborator
      Returns:
      an evaluator for the expression that returns a GroundedValue. The class SequenceEvaluator is declared to return a Sequence not a GroundedValue; we can't specialize it because it's a limitation of C# delegates, but the result can safely be cast to GroundedValue.

    • lazily

      public SequenceEvaluator lazily(boolean repeatable, boolean lazyEvaluationRequired)
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression lazily
      Overrides:
      lazily in class Elaborator
      Parameters:
      repeatable - true if the resulting Sequence must be usable repeatedly; false if it only needs to be used once
      lazyEvaluationRequired - true if the expression MUST be evaluated lazily, for example to prevent spurious errors or side-effects if it has been lifted out of a loop
      Returns:
      an evaluator for the expression that returns a Sequence (which may be a lazy sequence)

    • elaborateForPull

      public PullEvaluator elaborateForPull()
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression in the form of a SequenceIterator
      Specified by:
      elaborateForPull in class PullElaborator
      Returns:
      an evaluator for the expression that returns a SequenceIterator

    • elaborateForPush

      public PushEvaluator elaborateForPush()
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression in push mode, by writing events to an Outputter
      Overrides:
      elaborateForPush in class PullElaborator
      Returns:
      an evaluator for the expression in push mode

    • 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.
      Overrides:
      elaborateForItem in class PullElaborator
      Returns:
      an evaluator for the expression that returns an Item, or null to represent an empty sequence.

    • elaborateForBoolean

      public BooleanEvaluator elaborateForBoolean()
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression in the form of a boolean, this being the effective boolean value of the expression.
      Overrides:
      elaborateForBoolean in class PullElaborator
      Returns:
      an evaluator for the expression that returns a boolean.

    • elaborateForUnicodeString

      public UnicodeStringEvaluator elaborateForUnicodeString(boolean zeroLengthWhenAbsent)
      Description copied from class: Elaborator
      Get a function that evaluates the underlying expression in the form of a unicode string, this being the result of applying fn:string() to the result of the expression.
      Overrides:
      elaborateForUnicodeString in class PullElaborator
      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. For an expression or function that never returns an empty sequence (for example, a call on string() or normalize-space()), the argument has no effect.
      Returns:
      an evaluator for the expression that returns a string.

    • elaborateForString

      public StringEvaluator elaborateForString(boolean zeroLengthWhenAbsent)
      Description copied from class: Elaborator
      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.
      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.

    • elaborateForUpdate

      public UpdateEvaluator elaborateForUpdate()
      Overrides:
      elaborateForUpdate in class Elaborator