Package com.icl.saxon.expr

Class IntersectionEnumeration

  • All Implemented Interfaces:
    NodeEnumeration
    public class IntersectionEnumeration
extends java.lang.Object
implements NodeEnumeration
    An enumeration representing a nodeset that is an intersection of two other NodeSets. There is currently no operator in XPath to create such an expression, but it is used by the extension function intersection(). The code is derived from the analagous UnionEnumeration, an inner class of UnionExpression.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean hasMoreElements()
      Determine whether there are more nodes to come.
      boolean isPeer()
      Determine whether the nodes returned by this enumeration are known to be peers, that is, no node is a descendant or ancestor of another node.
      boolean isReverseSorted()
      Determine whether the nodes returned by this enumeration are known to be in reverse document order.
      boolean isSorted()
      Determine whether the nodes returned by this enumeration are known to be in document order
      NodeInfo nextElement()
      Get the next node in sequence.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • IntersectionEnumeration

        public IntersectionEnumeration​(NodeEnumeration p1,
                               NodeEnumeration p2,
                               Controller controller)
                        throws XPathException
        Form an enumeration of the intersection of the nodes in two nodesets
        Parameters:
        p1 - the first operand
        p2 - the second operand
        controller - Comparer to be used for putting nodes in document order
        Throws:
        XPathException

    • Method Detail

      • hasMoreElements

        public boolean hasMoreElements()
        Description copied from interface: NodeEnumeration
        Determine whether there are more nodes to come.
        (Note the term "Element" is used here in the sense of the standard Java Enumeration class, it has nothing to do with XML elements).
        Specified by:
        hasMoreElements in interface NodeEnumeration
        Returns:
        true if there are more nodes

      • nextElement

        public NodeInfo nextElement()
                     throws XPathException
        Description copied from interface: NodeEnumeration
        Get the next node in sequence.
        (Note the term "Element" is used here in the sense of the standard Java Enumeration class, it has nothing to do with XML elements).
        Specified by:
        nextElement in interface NodeEnumeration
        Returns:
        the next NodeInfo
        Throws:
        XPathException

      • isSorted

        public boolean isSorted()
        Description copied from interface: NodeEnumeration
        Determine whether the nodes returned by this enumeration are known to be in document order
        Specified by:
        isSorted in interface NodeEnumeration
        Returns:
        true if the nodes are guaranteed to be in document order.

      • isReverseSorted

        public boolean isReverseSorted()
        Description copied from interface: NodeEnumeration
        Determine whether the nodes returned by this enumeration are known to be in reverse document order.
        Specified by:
        isReverseSorted in interface NodeEnumeration
        Returns:
        true if the nodes are guaranteed to be in document order.

      • isPeer

        public boolean isPeer()
        Description copied from interface: NodeEnumeration
        Determine whether the nodes returned by this enumeration are known to be peers, that is, no node is a descendant or ancestor of another node. This significance of this property is that if a peer enumeration is applied to each node in a set derived from another peer enumeration, and if both enumerations are sorted, then the result is also sorted.
        Specified by:
        isPeer in interface NodeEnumeration