Package org.apache.commons.jxpath.ri.axes

Class PredicateContext

java.lang.Object
org.apache.commons.jxpath.ri.EvalContext
org.apache.commons.jxpath.ri.axes.PredicateContext
All Implemented Interfaces:
Iterator, ExpressionContext
public class PredicateContext extends EvalContext
EvalContext that checks predicates.
Version:
$Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
Author:
Dmitri Plotnikov

  • Constructor Details

    • PredicateContext

      public PredicateContext(EvalContext parentContext, Expression expression)
      Create a new PredicateContext.
      Parameters:
      parentContext - parent context
      expression - compiled Expression

  • Method Details

    • nextNode

      public boolean nextNode()
      Description copied from class: EvalContext
      Returns true if there is another object in the current set. Switches the current position and node to the next object.
      Specified by:
      nextNode in class EvalContext
      Returns:
      boolean

    • setPosition

      public boolean setPosition(int position)
      Description copied from class: EvalContext
      Moves the current position to the specified index. Used with integer predicates to quickly get to the n'th element of the node set. Returns false if the position is out of the node set range. You can call it with 0 as the position argument to restart the iteration.
      Overrides:
      setPosition in class EvalContext
      Parameters:
      position - to set
      Returns:
      boolean

    • getCurrentNodePointer

      public NodePointer getCurrentNodePointer()
      Description copied from class: EvalContext
      Returns the current context node. Undefined before the beginning of the iteration.
      Specified by:
      getCurrentNodePointer in class EvalContext
      Returns:
      NodePoiner

    • reset

      public void reset()
      Description copied from class: EvalContext
      Sets current position = 0, which is the pre-iteration state.
      Overrides:
      reset in class EvalContext

    • nextSet

      public boolean nextSet()
      Description copied from class: EvalContext
      Returns true if there is another sets of objects to interate over. Resets the current position and node.
      Overrides:
      nextSet in class EvalContext
      Returns:
      boolean