- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xalan" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, Lotus
- * Development Corporation., http://www.lotus.com. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- package org.apache.xpath.axes;
-
- import javax.xml.transform.TransformerException;
-
- import org.apache.xpath.compiler.Compiler;
- import org.apache.xpath.patterns.NodeTest;
- import org.apache.xpath.objects.XObject;
-
- import org.apache.xml.dtm.DTM;
- import org.apache.xml.dtm.DTMIterator;
- import org.apache.xml.dtm.DTMFilter;
- import org.apache.xml.dtm.DTMAxisTraverser;
- import org.apache.xml.dtm.Axis;
-
- /**
- * <meta name="usage" content="advanced"/>
- * This class implements an optimized iterator for
- * children patterns that have a node test, and possibly a predicate.
- * @see org.apache.xpath.axes.WalkerFactory#newLocPathIterator
- */
- public class ChildTestIterator extends BasicTestIterator
- {
- /** The traverser to use to navigate over the descendants. */
- transient protected DTMAxisTraverser m_traverser;
-
- /** The extended type ID, not set until setRoot. */
- // protected int m_extendedTypeID;
-
-
- /**
- * Create a ChildTestIterator object.
- *
- * @param compiler A reference to the Compiler that contains the op map.
- * @param opPos The position within the op map, which contains the
- * location path expression for this itterator.
- *
- * @throws javax.xml.transform.TransformerException
- */
- ChildTestIterator(Compiler compiler, int opPos, int analysis)
- throws javax.xml.transform.TransformerException
- {
- super(compiler, opPos, analysis);
- }
-
- /**
- * Create a ChildTestIterator object.
- *
- * @param traverser Traverser that tells how the KeyIterator is to be handled.
- *
- * @throws javax.xml.transform.TransformerException
- */
- public ChildTestIterator(DTMAxisTraverser traverser)
- {
-
- super(null);
-
- m_traverser = traverser;
- }
-
- /**
- * Get the next node via getNextXXX. Bottlenecked for derived class override.
- * @return The next node on the axis, or DTM.NULL.
- */
- protected int getNextNode()
- {
- if(true /* 0 == m_extendedTypeID */)
- {
- m_lastFetched = (DTM.NULL == m_lastFetched)
- ? m_traverser.first(m_context)
- : m_traverser.next(m_context, m_lastFetched);
- }
- // else
- // {
- // m_lastFetched = (DTM.NULL == m_lastFetched)
- // ? m_traverser.first(m_context, m_extendedTypeID)
- // : m_traverser.next(m_context, m_lastFetched,
- // m_extendedTypeID);
- // }
-
- return m_lastFetched;
- }
-
-
- /**
- * Get a cloned Iterator that is reset to the beginning
- * of the query.
- *
- * @return A cloned NodeIterator set of the start of the query.
- *
- * @throws CloneNotSupportedException
- */
- public DTMIterator cloneWithReset() throws CloneNotSupportedException
- {
-
- ChildTestIterator clone = (ChildTestIterator) super.cloneWithReset();
- clone.m_traverser = m_traverser;
-
- return clone;
- }
-
-
- /**
- * Initialize the context values for this expression
- * after it is cloned.
- *
- * @param execContext The XPath runtime context for this
- * transformation.
- */
- public void setRoot(int context, Object environment)
- {
- super.setRoot(context, environment);
- m_traverser = m_cdtm.getAxisTraverser(Axis.CHILD);
-
- // String localName = getLocalName();
- // String namespace = getNamespace();
- // int what = m_whatToShow;
- // // System.out.println("what: ");
- // // NodeTest.debugWhatToShow(what);
- // if(DTMFilter.SHOW_ALL == what ||
- // ((DTMFilter.SHOW_ELEMENT & what) == 0)
- // || localName == NodeTest.WILD
- // || namespace == NodeTest.WILD)
- // {
- // m_extendedTypeID = 0;
- // }
- // else
- // {
- // int type = getNodeTypeTest(what);
- // m_extendedTypeID = m_cdtm.getExpandedTypeID(namespace, localName, type);
- // }
-
- }
-
- /**
- * Returns the axis being iterated, if it is known.
- *
- * @return Axis.CHILD, etc., or -1 if the axis is not known or is of multiple
- * types.
- */
- public int getAxis()
- {
- return org.apache.xml.dtm.Axis.CHILD;
- }
-
-
- }