Class OneStepIterator

    • Constructor Detail

      • OneStepIterator

        public OneStepIterator​(DTMAxisIterator iterator,
                               int axis)
                        throws javax.xml.transform.TransformerException
        Create a OneStepIterator object.
        Parameters:
        iterator - The DTM iterator which this iterator will use.
        axis - One of Axis.Child, etc., or -1 if the axis is unknown.
        Throws:
        javax.xml.transform.TransformerException
    • Method Detail

      • setRoot

        public void setRoot​(int context,
                            java.lang.Object environment)
        Initialize the context values for this expression after it is cloned.
        Specified by:
        setRoot in interface DTMIterator
        Overrides:
        setRoot in class ChildTestIterator
        Parameters:
        context - The XPath runtime context for this transformation.
        environment - The environment object. The environment in which this iterator operates, which should provide:
        • a node (the context node... same value as "root" defined below)
        • a pair of non-zero positive integers (the context position and the context size)
        • a set of variable bindings
        • a function library
        • the set of namespace declarations in scope for the expression.
          • At this time the exact implementation of this environment is application dependent. Probably a proper interface will be created fairly soon.

      • detach

        public void detach()
        Detaches the iterator from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state. Afterdetach has been invoked, calls to nextNode orpreviousNode will raise the exception INVALID_STATE_ERR.
        Specified by:
        detach in interface DTMIterator
        Overrides:
        detach in class ChildTestIterator
      • clone

        public java.lang.Object clone()
                               throws java.lang.CloneNotSupportedException
        Get a cloned iterator.
        Specified by:
        clone in interface DTMIterator
        Overrides:
        clone in class PredicatedNodeTest
        Returns:
        A new iterator that can be used without mutating this one.
        Throws:
        java.lang.CloneNotSupportedException
      • cloneWithReset

        public DTMIterator cloneWithReset()
                                   throws java.lang.CloneNotSupportedException
        Get a cloned Iterator that is reset to the beginning of the query.
        Specified by:
        cloneWithReset in interface DTMIterator
        Overrides:
        cloneWithReset in class ChildTestIterator
        Returns:
        A cloned NodeIterator set of the start of the query.
        Throws:
        java.lang.CloneNotSupportedException
      • isReverseAxes

        public boolean isReverseAxes()
        Tells if this is a reverse axes. Overrides AxesWalker#isReverseAxes.
        Overrides:
        isReverseAxes in class PredicatedNodeTest
        Returns:
        true for this class.
      • getLength

        public int getLength()
        The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
        Specified by:
        getLength in interface DTMIterator
        Overrides:
        getLength in class LocPathIterator
        Returns:
        The number of nodes in the list, always greater or equal to zero.
      • getAxis

        public int getAxis()
        Returns the axis being iterated, if it is known.
        Specified by:
        getAxis in interface DTMIterator
        Overrides:
        getAxis in class ChildTestIterator
        Returns:
        Axis.CHILD, etc., or -1 if the axis is not known or is of multiple types.
      • deepEquals

        public boolean deepEquals​(Expression expr)
        Description copied from class: Expression
        Compare this object with another object and see if they are equal, include the sub heararchy.
        Overrides:
        deepEquals in class PredicatedNodeTest
        Parameters:
        expr - Another expression object.
        Returns:
        true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.
        See Also:
        Expression.deepEquals(Expression)