XMLParserEx.h

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/*
    ------------------------------------------------------------------------------------
    LICENSE:
    ------------------------------------------------------------------------------------
    This file is part of EVEmu: EVE Online Server Emulator
    Copyright 2006 - 2021 The EVEmu Team
    For the latest information visit https://evemu.dev
    ------------------------------------------------------------------------------------
    This program 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 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser 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, or go to
    http://www.gnu.org/copyleft/lesser.txt.
    ------------------------------------------------------------------------------------
    Author:     Bloody.Rabbit
*/

#ifndef __UTILS__XML_PARSER_EX_H__INCL__
#define __UTILS__XML_PARSER_EX_H__INCL__

#include "utils/str2conv.h"
#include "utils/XMLParser.h"

class XMLParserEx
: public XMLParser
{
public:
    template< typename T >
    class MemberElementParser;

    template< typename T >
    class ValueParser;

    template< typename T >
    void AddMemberParser( const char* name, T& instance, bool ( T::* method )( const TiXmlElement* ) )
    {
        AddParser( name, new MemberElementParser< T >( instance, method ) );
    }

    template< typename T >
    void AddValueParser( const char* name, T& value )
    {
        AddParser( name, new ValueParser< T >( value ) );
    }

protected:
    template< typename T >
    void AddMemberParser( const char* name, bool ( T::* method )( const TiXmlElement* ) )
    {
        AddMemberParser< T >( name, static_cast< T& >( *this ), method );
    }
};

template< typename T >
class XMLParserEx::MemberElementParser
: public ElementParser
{
public:
    typedef T Class;
    typedef bool ( Class::* Method )( const TiXmlElement* );

    MemberElementParser( Class& instance, const Method& method )
    : mInstance( instance ),
      mMethod( method )
    {
    }

    bool Parse( const TiXmlElement* field )
    {
        return ( mInstance.*mMethod )( field );
    }

protected:
    Class& mInstance;
    const Method mMethod;
};

template< typename T >
class XMLParserEx::ValueParser
: public ElementParser
{
public:
    typedef T Value;

    ValueParser( Value& value )
    : mValue( value )
    {
    }

    bool Parse( const TiXmlElement* field )
    {
        // obtain the text element
        const TiXmlNode* contents = field->FirstChild();
        if( NULL == contents || TiXmlNode::TINYXML_TEXT != contents->Type() )
        {
            sLog.Error( "XMLParser", "Expected a text element in element '%s' at line %d.", field->Value(), field->Row() );
            return false;
        }

        // parse the text
        mValue = str2< Value >( contents->Value() );

        // return
        return true;
    }

protected:
    Value& mValue;
};

#endif /* !__UTILS__XML_PARSER_EX_H__INCL__ */