Package org.rumbledb.runtime.functions.xml

Class NilledFunctionIterator

java.lang.Object
org.rumbledb.runtime.plan.RuntimePlan<Item>
org.rumbledb.runtime.plan.ItemRuntimePlan
org.rumbledb.runtime.functions.base.LocalFunctionCallIterator
org.rumbledb.runtime.functions.xml.NilledFunctionIterator
All Implemented Interfaces:
Serializable, LocalRuntimePlan<Item>
public class NilledFunctionIterator extends LocalFunctionCallIterator
Implementation of the fn:nilled function according to XPath and XQuery Functions and Operators 3.1 (https://www.w3.org/TR/xpath-functions-31/#func-nilled) and the XDM 3.1 nilled accessor. XDM 3.1 Section 5.8 nilled Accessor. dm:nilled($n as node()) as xs:boolean? "The dm:nilled accessor returns true if the element node is nilled, false if the element node is not nilled, or the empty sequence if the concept of nilled does not apply." In this API, the optional xs:boolean result is represented as a sequence of zero or one Items returned by Item.nilled(). Function signature (Functions and Operators 3.1, fn:nilled):
  • fn:nilled($arg as node()?) as xs:boolean?
Rules:
  • If the argument is supplied and is the empty sequence, the function returns the empty sequence.
  • Otherwise, the function returns dm:nilled($arg).
See Also:

  • Constructor Details

  • Method Details

    • createNativeCursor

      public Cursor<Item> createNativeCursor(DynamicContext context)
      Description copied from interface: LocalRuntimePlan
      Creates an independent cursor for one native local evaluation.
      Parameters:
      context - the dynamic context for that evaluation
      Returns:
      an unopened cursor