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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
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| Current Path : /proc/self/root/usr/include/CLAM/ |
| Current File : //proc/self/root/usr/include/CLAM/DomDocumentHandler.hxx |
/*
* Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _DomDocumentHandler_hxx_
#define _DomDocumentHandler_hxx_
/**
* @class CLAM::DomDocumentHandler
* @ingroup XmlBackends
* @brief This class subclasses from the proper DomDocumentHandler depending
* on the build time configuration 'xmlbackend' option.
*
* An XML implementation is choosen depending on the USE_XXXXXX
* directives concerning XML libraries.
* The current USE_XXXXXX variables that affect this class in priority order are:
* - USE_XERCES: Chooses XercesDomDocumentHandler (Apache's Xerces-C++)
* - USE_XMLPP: Chooses LibXmlDomDocumentHandler (Gnome's libxml++)
*
* If you choose 'none' as backend, then a Null implementation will
* be used that fails an assertion whenever you try to use the XML
* serialization.
*
* @see XercesDomDocumentHandler
* @see LibXmlDomDocumentHandler
* @see NullDomDocumentHandler
* @author David Garcia.
*/
#if defined USE_XERCES
#include "XercesDomDocumentHandler.hxx"
namespace CLAM
{
class DomDocumentHandler : public XercesDomDocumentHandler {};
}
#elif defined USE_XMLPP
#include "LibXmlDomDocumentHandler.hxx"
namespace CLAM
{
class DomDocumentHandler : public LibXmlDomDocumentHandler {};
}
#elif !defined CLAM_USE_XML
#include "NullDomDocumentHandler.hxx"
namespace CLAM
{
class DomDocumentHandler : public NullDomDocumentHandler {};
}
#else
#error CLAM_USE_XML active but no backend available (libxml++, xerces...)
#endif//USE_XMLPP
/**
* @defgroup XmlBackends XML Implementation Backends
* @ingroup Xml
* @brief This documentation module explains the XML implementation backends.
*
* CLAM supports different XML libraries as backend for the XML support.
* This can be done by implementing the DomDocumentHandler class and
* its nested classes, DomDocumentWritingContext and DomDocumentReadingContext.
*
* A DocumentHandler provides the abstraction that CLAM::XmlStorage
* uses to perform its tasks:
* DOM construction and exploration, and file reading and writing.
*
* Two inner classes (or typedefs) named DomDocumentReadingContext and
* DomDocumentWritingContext, must be defined.
* Those inner classes keeps the context while mapping for reading and writting
* CLAM::Objects to a given XML tree element.
*
* Usually a XXXReader and a XXXWriter are implemented in order to build
* a DOM tree from an XML file and to write it given the DOM Document.
* The Document Handler also keeps the selected node in order to do partial operations
* like adding object on a given tree position or dumping a document fragment.
*
* Currently, the following implementations are available:
* - CLAM::NullDomDocumentHandler:
* A dummy one, that just assert false when it is instanciated,
* just in case XML is used and it is disabled.
* - CLAM::XercesDomDocumentHandler:
* Based on the Xerces-C++ library
* - CLAM::LibXmlDomDocumentHandler:
* Based on the libxml++ library (Experimental)
* @author David Garcia.
*/
#endif//_XercesDomDocumentHandler_hxx_
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