StDOMNode.hpp Source File

00001 #ifndef DOMSPtr_HEADER_GUARD_
00002 #define DOMSPtr_HEADER_GUARD_
00003 
00004 /*
00005  * The Apache Software License, Version 1.1
00006  *
00007  * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
00008  * reserved.
00009  *
00010  * Redistribution and use in source and binary forms, with or without
00011  * modification, are permitted provided that the following conditions
00012  * are met:
00013  *
00014  * 1. Redistributions of source code must retain the above copyright
00015  *    notice, this list of conditions and the following disclaimer.
00016  *
00017  * 2. Redistributions in binary form must reproduce the above copyright
00018  *    notice, this list of conditions and the following disclaimer in
00019  *    the documentation and/or other materials provided with the
00020  *    distribution.
00021  *
00022  * 3. The end-user documentation included with the redistribution,
00023  *    if any, must include the following acknowledgment:
00024  *       "This product includes software developed by the
00025  *        Apache Software Foundation (http://www.apache.org/)."
00026  *    Alternately, this acknowledgment may appear in the software itself,
00027  *    if and wherever such third-party acknowledgments normally appear.
00028  *
00029  * 4. The names "Xerces" and "Apache Software Foundation" must
00030  *    not be used to endorse or promote products derived from this
00031  *    software without prior written permission. For written
00032  *    permission, please contact apache\@apache.org.
00033  *
00034  * 5. Products derived from this software may not be called "Apache",
00035  *    nor may "Apache" appear in their name, without prior written
00036  *    permission of the Apache Software Foundation.
00037  *
00038  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00039  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00040  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00041  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
00042  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00043  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00044  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00045  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00046  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00047  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
00048  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00049  * SUCH DAMAGE.
00050  * ====================================================================
00051  *
00052  * This software consists of voluntary contributions made by many
00053  * individuals on behalf of the Apache Software Foundation, and was
00054  * originally based on software copyright (c) 2001, International
00055  * Business Machines, Inc., http://www.ibm.com .  For more information
00056  * on the Apache Software Foundation, please see
00057  * <http://www.apache.org/>.
00058  */
00059 
00060 /*
00061  * $Id: StDOMNode.hpp,v 1.2 2003/05/06 13:48:34 neilg Exp $
00062  */
00063 
00064 #include <xercesc/dom/DOMNode.hpp>
00065 #include <xercesc/dom/DOMAttr.hpp>
00066 #include <xercesc/dom/DOMElement.hpp>
00067 
00068 XERCES_CPP_NAMESPACE_BEGIN
00069 
00070 /* This class is a smart pointer implementation over DOMNode interface and
00071 ** classes derived from it. It takes care of reference counting automatically.
00072 ** Reference counting is optional so use of this class is experimental.
00073 */
00074 template <class T> class StDOMNode {
00075     T* m_node;
00076 
00077     static inline void INCREFCOUNT(T *x) { if (x != (T*)0) x->incRefCount(); }
00078     static inline void DECREFCOUNT(T *x) { if (x != (T*)0) x->decRefCount(); }
00079 
00080 public:
00081     inline StDOMNode(T* node = (T*)0) : m_node(node) { INCREFCOUNT(m_node); }
00082     inline StDOMNode(const StDOMNode& stNode) : m_node(stNode.m_node) { INCREFCOUNT(m_node); }
00083     inline ~StDOMNode() { DECREFCOUNT(m_node); }
00084 
00085     inline T* operator= (T *node)
00086     {
00087         if (m_node != node) {
00088             DECREFCOUNT(m_node);
00089             m_node = node;
00090             INCREFCOUNT(m_node);
00091         }
00092         return (m_node);
00093     }
00094 
00095     inline bool operator!= (T* node) const { return (m_node != node); }
00096     inline bool operator== (T* node) const { return (m_node == node); }
00097 
00098     inline T& operator* () { return (*m_node); }
00099     inline const T& operator* () const { return (*m_node); }
00100     inline T* operator-> () const { return (m_node); }
00101     inline operator T*() const { return (m_node); }
00102     inline void ClearNode() { operator=((T*)(0)); }
00103 };
00104 
00105 #if defined(XML_DOMREFCOUNT_EXPERIMENTAL)
00106     typedef StDOMNode<DOMNode> DOMNodeSPtr;
00107 #else
00108     typedef DOMNode* DOMNodeSPtr;
00109 #endif
00110 
00111 /* StDOMNode is a smart pointer implementation over DOMNode interface and
00112 ** classes derived from it. It takes care of reference counting automatically.
00113 ** Reference counting is optional so use of this class is experimental.
00114 */
00115 #if defined(XML_DOMREFCOUNT_EXPERIMENTAL)
00116     typedef StDOMNode<DOMAttr> DOMAttrSPtr;
00117 #else
00118     typedef DOMAttr* DOMAttrSPtr;
00119 #endif
00120 
00121 /* StDOMNode is a smart pointer implementation over DOMNode interface and
00122 ** classes derived from it. It takes care of reference counting automatically.
00123 ** Reference counting is optional so use of this class is experimental.
00124 */
00125 #if defined(XML_DOMREFCOUNT_EXPERIMENTAL)
00126     typedef StDOMNode<DOMElement> DOMElementSPtr;
00127 #else
00128     typedef DOMElement* DOMElementSPtr;
00129 #endif
00130 
00131 XERCES_CPP_NAMESPACE_END
00132 
00133 #endif
00134