Class PredicatedNodeTest

    • Field Detail

      • m_predCount

        protected int m_predCount
      • m_foundLast

        protected transient boolean m_foundLast
        This is true if nextNode returns null.
      • m_lpi

        protected LocPathIterator m_lpi
        The owning location path iterator.
      • m_predicateIndex

        transient int m_predicateIndex
        Which predicate we are executing.
      • predicates_

        private Expression[] predicates_
        The list of predicate expressions. Is static and does not need to be deep cloned.
      • m_proximityPositions

        protected transient int[] m_proximityPositions
        An array of counts that correspond to the number of predicates the step contains.
      • DEBUG_PREDICATECOUNTING

        static final boolean DEBUG_PREDICATECOUNTING
        If true, diagnostic messages about predicate execution will be posted.
        See Also:
        Constant Field Values
    • Constructor Detail

      • PredicatedNodeTest

        PredicatedNodeTest​(LocPathIterator locPathIterator)
        Construct an AxesWalker using a LocPathIterator.
        Parameters:
        locPathIterator - non-null reference to the parent iterator.
      • PredicatedNodeTest

        PredicatedNodeTest()
        Construct an AxesWalker. The location path iterator will have to be set before use.
    • Method Detail

      • clone

        public java.lang.Object clone()
                               throws java.lang.CloneNotSupportedException
        Overrides:
        clone in class java.lang.Object
        Throws:
        java.lang.CloneNotSupportedException
      • getPredicateCount

        public int getPredicateCount()
        Get the number of predicates that this walker has.
        Returns:
        the number of predicates that this walker has.
      • setPredicateCount

        public void setPredicateCount​(int count)
        Set the number of predicates that this walker has. This does more that one would think, as it creates a new predicate array of the size of the count argument, and copies count predicates into the new one from the old, and then reassigns the predicates value. All this to keep from having to have a predicate count value.
        Parameters:
        count - The number of predicates, which must be equal or less than the existing count.
      • initPredicateInfo

        protected void initPredicateInfo​(Compiler compiler,
                                         int opPos)
                                  throws javax.xml.transform.TransformerException
        Init predicate info.
        Parameters:
        compiler - The Compiler object that has information about this walker in the op map.
        opPos - The op code position of this location step.
        Throws:
        javax.xml.transform.TransformerException - if any
      • getPredicate

        public Expression getPredicate​(int index)
        Get a predicate expression at the given index.
        Parameters:
        index - Index of the predicate.
        Returns:
        A predicate expression.
      • getProximityPosition

        public int getProximityPosition()
        Get the current sub-context position.
        Returns:
        The node position of this walker in the sub-context node list.
      • getProximityPosition

        public int getProximityPosition​(XPathContext xctxt)
        Get the current sub-context position.
        Specified by:
        getProximityPosition in interface SubContextList
        Parameters:
        xctxt - The XPath runtime context.
        Returns:
        The position of the current node in the list.
      • getLastPos

        public abstract int getLastPos​(XPathContext xctxt)
        Get the number of nodes in the node list, which, in the XSLT 1 based counting system, is the last index position.
        Specified by:
        getLastPos in interface SubContextList
        Parameters:
        xctxt - The XPath runtime context.
        Returns:
        the number of nodes in the node list.
      • getProximityPosition

        protected int getProximityPosition​(int predicateIndex)
        Get the current sub-context position.
        Parameters:
        predicateIndex - The index of the predicate where the proximity should be taken from.
        Returns:
        The node position of this walker in the sub-context node list.
      • resetProximityPositions

        public void resetProximityPositions()
        Reset the proximity positions counts.
      • initProximityPosition

        public void initProximityPosition​(int i)
        Init the proximity position to zero for a forward axes.
        Parameters:
        i - The index into the m_proximityPositions array.
      • countProximityPosition

        protected void countProximityPosition​(int i)
        Count forward one proximity position.
        Parameters:
        i - The index into the m_proximityPositions array, where the increment will occur.
      • isReverseAxes

        public boolean isReverseAxes()
        Tells if this is a reverse axes.
        Returns:
        false, unless a derived class overrides.
      • executePredicates

        boolean executePredicates​(int context,
                                  XPathContext xctxt)
                           throws javax.xml.transform.TransformerException
        Process the predicates.
        Parameters:
        context - The current context node.
        xctxt - The XPath runtime context.
        Returns:
        the result of executing the predicate expressions.
        Throws:
        javax.xml.transform.TransformerException - if any
      • nodeToString

        protected java.lang.String nodeToString​(int n)
        Diagnostics.
        Parameters:
        n - Node to give diagnostic information about, or null.
        Returns:
        Informative string about the argument.
      • acceptNode

        public short acceptNode​(int n)
        Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator. This function will be called by the implementation of TreeWalker and NodeIterator; it is not intended to be called directly from user code.
        Parameters:
        n - The node to check to see if it passes the filter or not.
        Returns:
        a constant to determine whether the node is accepted, rejected, or skipped, as defined above .
      • setLocPathIterator

        public void setLocPathIterator​(LocPathIterator li)
        Set the location path iterator owner for this walker. Besides initialization, this function is called during cloning operations.
        Parameters:
        li - non-null reference to the owning location path iterator.
      • canTraverseOutsideSubtree

        public boolean canTraverseOutsideSubtree()
        Tell if this expression or it's subexpressions can traverse outside the current subtree.
        Overrides:
        canTraverseOutsideSubtree in class Expression
        Returns:
        true if traversal outside the context node's subtree can occur.
      • callPredicateVisitors

        public void callPredicateVisitors​(XPathVisitor visitor)
        This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.
        Parameters:
        visitor - The visitor whose appropriate method will be called.
      • deepEquals

        public boolean deepEquals​(Expression expr)
        Compare this object with another object and see if they are equal, include the sub heararchy.
        Overrides:
        deepEquals in class NodeTest
        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.