Class Root_1

All Implemented Interfaces:
Callable, FunctionItem, GroundedValue, Item, Sequence

public class Root_1 extends SystemFunction
Implement the XPath 2.0 root() function with one argument
  • Constructor Details

    • Root_1

      public Root_1()
  • Method Details

    • getSpecialProperties

      public int getSpecialProperties(Expression[] arguments)
      Get the static properties of this expression (other than its type). The result is bit-significant. These properties are used for optimizations. In general, if property bit is set, it is true, but if it is unset, the value is unknown.
      Overrides:
      getSpecialProperties in class SystemFunction
      Parameters:
      arguments - the actual arguments to the function call
      Returns:
      the properties
    • call

      public Sequence 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
    • getStreamerName

      public String getStreamerName()
      Description copied from class: SystemFunction
      Get a name that identifies the class that can be used to evaluate this function in streaming mode, that is, supplying one item or event at a time as it is delivered by the parser. Special streaming support is generally available in Saxon-EE for all system functions that take a sequence as their argument.
      Overrides:
      getStreamerName in class SystemFunction
      Returns:
      a name that identifies a class that supports streamed evaluation of this system function, or null if no such class is available. The mapping of names to classes is defined in the Saxon-EE class StreamerMap. In non-streaming Saxon editions (HE and PE) the method always returns null.
    • getElaborator

      public Elaborator getElaborator()
      Make an elaborator for a system function call on this function
      Overrides:
      getElaborator in class SystemFunction
      Returns:
      a suitable elaborator; or null if no custom elaborator is available