Class Subsequence

All Implemented Interfaces:
Serializable, SourceLocator, Container, Expression, InstructionInfoProvider

public class Subsequence extends SystemFunction
Implements the XPath 2.0 subsequence() function
See Also:
  • Constructor Details

    • Subsequence

      public Subsequence()
  • Method Details

    • getItemType

      public ItemType getItemType(TypeHierarchy th)
      Determine the data type of the items in the sequence
      Specified by:
      getItemType in interface Expression
      Overrides:
      getItemType in class SystemFunction
      Parameters:
      th -
      Returns:
      the type of the argument
    • computeSpecialProperties

      public int computeSpecialProperties()
      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:
      computeSpecialProperties in class SystemFunction
    • iterate

      public SequenceIterator iterate(XPathContext context) throws XPathException
      Evaluate the function to return an iteration of selected nodes.
      Specified by:
      iterate in interface Expression
      Overrides:
      iterate in class ComputedExpression
      Parameters:
      context - supplies the context for evaluation
      Returns:
      a SequenceIterator that can be used to iterate over the result of the expression
      Throws:
      XPathException - if any dynamic error occurs evaluating the expression