Class UnionChildIterator

All Implemented Interfaces:
Cloneable, SourceLocator, PathComponent, SubContextList, ExpressionNode, DTMIterator, XPathVisitable

public class UnionChildIterator extends ChildTestIterator
This class defines a simplified type of union iterator that only tests along the child axes. If the conditions are right, it is much faster than using a UnionPathIterator.
  • Field Details

    • m_nodeTests

      private PredicatedNodeTest[] m_nodeTests
      Even though these may hold full LocPathIterators, this array does not have to be cloned, since only the node test and predicate portion are used, and these only need static information. However, also note that index predicates can not be used!
  • Constructor Details

    • UnionChildIterator

      public UnionChildIterator()
      Constructor for UnionChildIterator
  • Method Details

    • addNodeTest

      public void addNodeTest(PredicatedNodeTest test)
      Add a node test to the union list.
      Parameters:
      test - reference to a NodeTest, which will be added directly to the list of node tests (in other words, it will not be cloned). The parent of this test will be set to this object.
    • 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.
      Overrides:
      acceptNode in class PredicatedNodeTest
      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 .