| /* |
| * 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.WhitespaceStrippingElementMatcher; |
| import org.apache.xml.utils.PrefixResolver; |
| |
| import org.w3c.dom.Node; |
| import org.w3c.dom.DOMException; |
| |
| /** |
| * <meta name="usage" content="advanced"/> |
| * This class implements an optimized iterator for |
| * "node()" patterns, that is, any children of the |
| * context node. |
| * @see org.apache.xpath.axes.WalkerFactory#newLocPathIterator |
| */ |
| public class ChildIterator extends LocPathIterator |
| { |
| |
| /** |
| * Create a ChildIterator 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. |
| * NEEDSDOC @param analysis |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public ChildIterator(Compiler compiler, int opPos, int analysis) |
| throws javax.xml.transform.TransformerException |
| { |
| super(compiler, opPos, analysis, false); |
| } |
| |
| /** |
| * Returns the next node in the set and advances the position of the |
| * iterator in the set. After a NodeIterator is created, the first call |
| * to nextNode() returns the first node in the set. |
| * |
| * @return The next <code>Node</code> in the set being iterated over, or |
| * <code>null</code> if there are no more members in that set. |
| * |
| * @throws DOMException |
| * INVALID_STATE_ERR: Raised if this method is called after the |
| * <code>detach</code> method was invoked. |
| */ |
| public Node nextNode() throws DOMException |
| { |
| |
| // If the cache is on, and the node has already been found, then |
| // just return from the list. |
| if ((null != m_cachedNodes) |
| && (m_cachedNodes.getCurrentPos() < m_cachedNodes.size())) |
| { |
| Node next = m_cachedNodes.nextNode(); |
| |
| this.setCurrentPos(m_cachedNodes.getCurrentPos()); |
| |
| return next; |
| } |
| |
| if (m_foundLast) |
| return null; |
| |
| Node next; |
| |
| while (true) |
| { |
| m_lastFetched = next = (null == m_lastFetched) |
| ? m_context.getFirstChild() |
| : m_lastFetched.getNextSibling(); |
| |
| // Yuck! Blech! -sb |
| if (null != next) |
| { |
| int nt = next.getNodeType(); |
| if(Node.DOCUMENT_TYPE_NODE == nt) // bug fix, position14, d2d, xerces DOM |
| continue; |
| else if ((Node.TEXT_NODE == nt) |
| &&!next.isSupported(SUPPORTS_PRE_STRIPPING, null)) |
| { |
| Node parent = next.getParentNode(); |
| |
| if (null != parent && Node.ELEMENT_NODE == parent.getNodeType()) |
| { |
| String data = next.getNodeValue(); |
| |
| if (org.apache.xml.utils.XMLCharacterRecognizer.isWhiteSpace( |
| data)) |
| { |
| |
| // Ugly trick for now. |
| PrefixResolver resolver = |
| getXPathContext().getNamespaceContext(); |
| |
| if (resolver instanceof WhitespaceStrippingElementMatcher) |
| { |
| WhitespaceStrippingElementMatcher wsem = |
| (WhitespaceStrippingElementMatcher) resolver; |
| |
| try |
| { |
| if (wsem.shouldStripWhiteSpace( |
| getXPathContext(), (org.w3c.dom.Element) parent)) |
| { |
| continue; |
| } |
| } |
| catch (javax.xml.transform.TransformerException te) |
| { |
| throw new org.apache.xml.utils.WrappedRuntimeException(te); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| break; |
| } |
| |
| // m_lastFetched = next; |
| if (null != next) |
| { |
| if (null != m_cachedNodes) |
| m_cachedNodes.addElement(m_lastFetched); |
| |
| m_next++; |
| |
| return next; |
| } |
| else |
| { |
| m_foundLast = true; |
| |
| return null; |
| } |
| } |
| } |