DeepNodeListImpl.cpp
上传用户:huihehuasu
上传日期:2007-01-10
资源大小:6948k
文件大小:10k
源码类别:
xml/soap/webservice
开发平台:
C/C++
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 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 "Xerces" 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, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: DeepNodeListImpl.cpp,v $
- * Revision 1.8 2001/10/25 21:47:14 peiyongz
- * Replace XMLDeleterFor with XMLRegisterCleanup
- *
- * Revision 1.7 2001/10/18 18:01:29 tng
- * [Bug 1699] Redirect "delete this" to a temp ptr to bypass AIX xlC v5 optimization memory leak problem.
- *
- * Revision 1.6 2000/04/27 02:52:42 lehors
- * global reorganization similar to what I've done in Java,
- * nodes now are much smaller.
- * The main changes are:
- * renamed NodeContainer to ParentNode,
- * introduced ChildNode and ChildAndParentNode,
- * all the boolean attributes have been changed to bit flags,
- * ownerDocument is no longer an attribute of NodeImpl, only Parent nodes have
- * it, leave nodes rely on their parent to get it, or get it from ownerNode when
- * they do not have a parent,
- * parent Nodes no longer have a direct pointer to the last child
- * instead the last child is stored as the previous sibling of
- * the first child.
- * I also added support for importing a DocumentType as it's done in Java,
- * and got the importNode mechanism back in sync with Java as well.
- *
- * Here are the most significant changes in size:
- * ElementImpl 52 -> 48
- * TextImpl 44 -> 32
- * AttrImpl 52 -> 36
- *
- * Revision 1.5 2000/03/02 19:53:59 roddey
- * This checkin includes many changes done while waiting for the
- * 1.1.0 code to be finished. I can't list them all here, but a list is
- * available elsewhere.
- *
- * Revision 1.4 2000/02/06 07:47:31 rahulj
- * Year 2K copyright swat.
- *
- * Revision 1.3 2000/02/04 01:49:30 aruna1
- * TreeWalker and NodeIterator changes
- *
- * Revision 1.2 2000/01/22 01:38:29 andyh
- * Remove compiler warnings in DOM impl classes
- *
- * Revision 1.1.1.1 1999/11/09 01:08:42 twl
- * Initial checkin
- *
- * Revision 1.3 1999/11/08 20:44:23 rahul
- * Swat for adding in Product name and CVS comment log variable.
- *
- */
- #include "DeepNodeListImpl.hpp"
- #include "NodeVector.hpp"
- #include "NodeImpl.hpp"
- #include "ElementImpl.hpp"
- #include "DStringPool.hpp"
- #include <limits.h>
- static DOMString *kAstr = 0;
- static XMLRegisterCleanup kAstrCleanup;
- DeepNodeListImpl::DeepNodeListImpl(NodeImpl *rootNod, const DOMString &tagNam)
- {
- changes = 0;
- this->rootNode = rootNod;
- this->tagName = tagNam;
- nodes=new NodeVector();
- matchAll = tagName.equals(DStringPool::getStaticString("*"
- , &kAstr
- , reinitDeepNodeListImpl
- , kAstrCleanup));
- this->namespaceURI = null; //DOM Level 2
- this->matchAllURI = false; //DOM Level 2
- this->matchURIandTagname = false; //DOM Level 2
- };
- //DOM Level 2
- DeepNodeListImpl::DeepNodeListImpl(NodeImpl *rootNod,
- const DOMString &fNamespaceURI, const DOMString &localName)
- {
- changes = 0;
- this->rootNode = rootNod;
- this->tagName = localName;
- nodes=new NodeVector();
- matchAll = tagName.equals(DStringPool::getStaticString("*"
- , &kAstr
- , reinitDeepNodeListImpl
- , kAstrCleanup));
- this->namespaceURI = fNamespaceURI;
- this->matchAllURI = fNamespaceURI.equals(DStringPool::getStaticString("*"
- , &kAstr
- , reinitDeepNodeListImpl
- , kAstrCleanup));
- this->matchURIandTagname = true;
- };
- DeepNodeListImpl::~DeepNodeListImpl()
- {
- delete nodes;
- };
- unsigned int DeepNodeListImpl::getLength()
- {
- // Preload all matching elements. (Stops when we run out of subtree!)
- item(INT_MAX);
- return nodes->size();
- };
- // Start from the first child and count forward, 0-based. index>length-1
- // should return null.
- //
- // Attempts to do only work actually requested, cache work already
- // done, and to flush that cache when the tree has changed.
- //
- // LIMITATION: ????? Unable to tell relevant tree-changes from
- // irrelevant ones. Doing so in a really useful manner would seem
- // to involve a tree-walk in its own right, or maintaining our data
- // in a parallel tree.
- NodeImpl *DeepNodeListImpl::item(unsigned int index)
- {
- NodeImpl *thisNode;
- if(rootNode->changes() != changes)
- {
- nodes->reset(); // Tree changed. Do it all from scratch!
- changes = rootNode->changes();
- }
- if(index< nodes->size()) // In the cache
- return nodes->elementAt((int) index);
- else // Not yet seen
- {
- if(nodes->size()==0) // Pick up where we left off
- thisNode=rootNode; // (Which may be the beginning)
- else
- thisNode=nodes->lastElement();
- while(thisNode!=null && index >= nodes->size() && thisNode!=null)
- {
- thisNode=nextMatchingElementAfter(thisNode);
- if(thisNode!=null)
- nodes->addElement(thisNode);
- }
- return thisNode; // Either what we want, or null (not avail.)
- }
- };
- /* Iterative tree-walker. When you have a Parent link, there's often no
- need to resort to recursion. NOTE THAT only Element nodes are matched
- since we're specifically supporting getElementsByTagName().
- */
- NodeImpl *DeepNodeListImpl::nextMatchingElementAfter(NodeImpl *current)
- {
- NodeImpl *next;
- while (current != null)
- {
- // Look down to first child.
- if (current->hasChildNodes())
- {
- current = current->getFirstChild();
- }
- // Look right to sibling (but not from root!)
- else
- {
- if (current != rootNode && null != (next = current->getNextSibling()))
- {
- current = next;
- }
- // Look up and right (but not past root!)
- else
- {
- next = null;
- for (; current != rootNode; // Stop when we return to starting point
- current = current->getParentNode())
- {
- next = current->getNextSibling();
- if (next != null)
- break;
- }
- current = next;
- }
- }
- // Have we found an Element with the right tagName?
- // ("*" matches anything.)
- if (current != null && current != rootNode && current->isElementImpl()) {
- if (!matchURIandTagname) { //DOM Level 1
- if (matchAll || ((ElementImpl *)current)->getTagName().equals(tagName))
- return current;
- } else { //DOM Level 2
- if (!matchAllURI && !(current -> getNamespaceURI().equals(namespaceURI)))
- continue;
- if (matchAll || current -> getLocalName().equals(tagName))
- return current;
- }
- }
- // Otherwise continue walking the tree
- }
- // Fell out of tree-walk; no more instances found
- return null;
- };
- //
- // unreferenced() The RefCountedImpl base class calls back to this function
- // when the ref count goes to zero.
- //
- //
- void DeepNodeListImpl::unreferenced()
- {
- // delete this;
- DeepNodeListImpl* ptr = this;
- delete ptr;
- };
- // -----------------------------------------------------------------------
- // Notification that lazy data has been deleted
- // -----------------------------------------------------------------------
- void DeepNodeListImpl::reinitDeepNodeListImpl() {
- delete kAstr;
- kAstr = 0;
- }