Class StepPattern

    • Constructor Detail

      • StepPattern

        public StepPattern​(int whatToShow,
                           java.lang.String namespace,
                           java.lang.String name,
                           int axis,
                           int axisForPredicate)
        Construct a StepPattern that tests for namespaces and node names.
        Parameters:
        whatToShow - Bit set defined mainly by NodeFilter.
        namespace - The namespace to be tested.
        name - The local name to be tested.
        axis - The Axis for this test, one of of Axes.ANCESTORORSELF, etc.
        axisForPredicate - No longer used.
      • StepPattern

        public StepPattern​(int whatToShow,
                           int axis,
                           int axisForPredicate)
        Construct a StepPattern that doesn't test for node names.
        Parameters:
        whatToShow - Bit set defined mainly by NodeFilter.
        axis - The Axis for this test, one of of Axes.ANCESTORORSELF, etc.
        axisForPredicate - No longer used.
    • Method Detail

      • calcTargetString

        public void calcTargetString()
        Calculate the local name or psuedo name of the node that this pattern will test, for hash table lookup optimization.
        See Also:
        PsuedoNames
      • getTargetString

        public java.lang.String getTargetString()
        Get the local name or psuedo name of the node that this pattern will test, for hash table lookup optimization.
        Returns:
        local name or psuedo name of the node.
        See Also:
        PsuedoNames
      • fixupVariables

        public void fixupVariables​(java.util.Vector vars,
                                   int globalsSize)
        This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
        Overrides:
        fixupVariables in class NodeTest
        Parameters:
        vars - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame).
        globalsSize - The number of variables in the global variable area.
      • setRelativePathPattern

        public void setRelativePathPattern​(StepPattern expr)
        Set the reference to nodetest and predicate for parent or ancestor.
        Parameters:
        expr - The relative pattern expression.
      • getRelativePathPattern

        public StepPattern getRelativePathPattern()
        Get the reference to nodetest and predicate for parent or ancestor.
        Returns:
        The relative pattern expression.
      • getPredicates

        public Expression[] getPredicates()
        Set the list of predicate expressions for this pattern step.
        Returns:
        List of expression objects.
      • canTraverseOutsideSubtree

        public boolean canTraverseOutsideSubtree()
        Tell if this expression or it's subexpressions can traverse outside the current subtree. NOTE: Ancestors tests with predicates are problematic, and will require special treatment.
        Overrides:
        canTraverseOutsideSubtree in class Expression
        Returns:
        true if traversal outside the context node's subtree can occur.
      • getPredicate

        public Expression getPredicate​(int i)
        Get a predicate expression.
        Parameters:
        i - The index of the predicate.
        Returns:
        A predicate expression.
      • getPredicateCount

        public final int getPredicateCount()
        Get the number of predicates for this match pattern step.
        Returns:
        the number of predicates for this match pattern step.
      • setPredicates

        public void setPredicates​(Expression[] predicates)
        Set the predicates for this match pattern step.
        Parameters:
        predicates - An array of expressions that define predicates for this step.
      • calcScore

        public void calcScore()
        Static calc of match score.
      • execute

        public XObject execute​(XPathContext xctxt,
                               int currentNode,
                               DTM dtm,
                               int expType)
                        throws javax.xml.transform.TransformerException
        Execute an expression in the XPath runtime context, and return the result of the expression.
        Overrides:
        execute in class NodeTest
        Parameters:
        xctxt - The XPath runtime context.
        currentNode - The currentNode.
        dtm - The DTM of the current node.
        expType - The expanded type ID of the current node.
        Returns:
        The result of the expression in the form of a XObject.
        Throws:
        javax.xml.transform.TransformerException - if a runtime exception occurs.
      • getProximityPosition

        public int getProximityPosition​(XPathContext xctxt)
        Get the proximity position index of the current node based on this node test.
        Specified by:
        getProximityPosition in interface SubContextList
        Parameters:
        xctxt - XPath runtime context.
        Returns:
        the proximity position index of the current node based on the node test.
      • getLastPos

        public int getLastPos​(XPathContext xctxt)
        Get the count of the nodes that match the test, which is the proximity position of the last node that can pass this test in the sub context selection. In XSLT 1-based indexing, this count is the index of the last node.
        Specified by:
        getLastPos in interface SubContextList
        Parameters:
        xctxt - XPath runtime context.
        Returns:
        the count of the nodes that match the test.
      • toString

        public java.lang.String toString()
        Get the string represenentation of this step for diagnostic purposes.
        Overrides:
        toString in class java.lang.Object
        Returns:
        A string representation of this step, built by reverse-engineering the contained info.
      • setAxis

        public void setAxis​(int axis)
        Set the axis that this step should follow.
        Parameters:
        axis - The Axis for this test, one of of Axes.ANCESTORORSELF, etc.
      • getAxis

        public int getAxis()
        Get the axis that this step follows.
        Returns:
        The Axis for this test, one of of Axes.ANCESTORORSELF, etc.
      • 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 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.
        See Also:
        Expression.deepEquals(Expression)