XmlResolver.h

/*
 * Copyright (C) 2012 Marc Boris Duerner
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef Pt_Xml_XmlResolver_h
#define Pt_Xml_XmlResolver_h
 
#include <Pt/Xml/Api.h>
#include <Pt/Xml/XmlError.h>
#include <Pt/String.h>
#include <Pt/TextCodec.h>
 
namespace Pt {
 
namespace Xml {
 
class ByteorderMark;
class InputSource;
class XmlDeclaration;

class XmlResolver
{
    public:
        virtual ~XmlResolver()
        {}

        InputSource* resolveInput(const Pt::String& publicId, 
                                  const Pt::String& systemId)
        {
            return onResolveInput(publicId, systemId);
        }

        void releaseInput(InputSource* is)
        {
            onReleaseInput(is);
        }

        TextCodec<Char, char>* resolveEncoding(const ByteorderMark& bom, 
                                               const XmlDeclaration& decl)
        {
            return onResolveEncoding(bom, decl);
        }
 
    protected:
        XmlResolver()
        {}

        virtual InputSource* onResolveInput(const Pt::String& publicId, 
                                            const Pt::String& systemId) = 0;

        virtual void onReleaseInput(InputSource* is) = 0;

        virtual TextCodec<Char, char>* onResolveEncoding(const ByteorderMark& bom, 
                                                         const XmlDeclaration& decl)
        { return 0; }
};
 
} // namespace Xml
 
} // namespace Pt
 
#endif // Pt_Xml_XmlResolver_h