Class StaticContextAccessor

All Implemented Interfaces:
Callable, FunctionItem, GroundedValue, Item, Sequence
Direct Known Subclasses:
StaticContextAccessor.DefaultCollation

public abstract class StaticContextAccessor extends SystemFunction
A StaticContextAccessor is a function that takes no arguments, but operates implicitly on the static context. In the case of a dynamic call, the context that is used is the one at the point where the function item is created.
  • Constructor Details

    • StaticContextAccessor

      public StaticContextAccessor()
  • Method Details

    • evaluate

      public abstract AtomicValue evaluate(RetainedStaticContext rsc)
      Method to do the actual evaluation, which must be implemented in a subclass
      Parameters:
      rsc - the retained static context
      Returns:
      the result of the evaluation
    • call

      public AtomicValue call(XPathContext context, Sequence[] arguments) throws XPathException
      Evaluate the expression
      Parameters:
      context - the dynamic evaluation context
      arguments - the values of the arguments, supplied as Sequences
      Returns:
      the result of the evaluation, in the form of a Sequence
      Throws:
      XPathException - if a dynamic error occurs during the evaluation of the expression
    • makeFunctionCall

      public Expression makeFunctionCall(Expression... arguments)
      Description copied from class: SystemFunction
      Make an expression that either calls this function, or that is equivalent to a call on this function
      Overrides:
      makeFunctionCall in class SystemFunction
      Parameters:
      arguments - the supplied arguments to the function call
      Returns:
      either a function call on this function, or an expression that delivers the same result