FilterChain.h

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/*
* FinTP - Financial Transactions Processing Application
* Copyright (C) 2013 Business Information Systems (Allevo) S.R.L.
*
* 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 3 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, see <http://www.gnu.org/licenses/>
* or contact Allevo at : 031281 Bucuresti, 23C Calea Vitan, Romania,
* phone +40212554577, office@allevo.ro <mailto:office@allevo.ro>, www.allevo.ro.
*/

#ifndef FILTERCHAIN_H
#define FILTERCHAIN_H

#ifdef WIN32
        #define __MSXML_LIBRARY_DEFINED__
#endif

#include <vector>
#include <map>
#include <string>
#include "AbstractFilter.h"

using namespace std;

namespace FinTP
{
        //EXPIMP_TEMPLATE template class ExportedObject std::vector< AbstractFilter* >;
        //EXPIMP_TEMPLATE template class ExportedObject std::vector< AbstractFilter::FilterMethod >;
        //EXPIMP_TEMPLATE template class ExportedObject std::map< AbstractFilter::FilterMethod, vector< AbstractFilter::FilterMethod >* >;

        typedef pair< AbstractFilter::FilterMethod, vector< AbstractFilter::FilterMethod >* > FilterChainPair;

        class ExportedObject FilterChain : public AbstractFilter
        {
                public:
                        FilterChain();
                        ~FilterChain();
                        
                        // adds a filter and returns its index
                        int AddFilter( FilterType::FilterTypeEnum type, NameValueCollection* properties );

                        // access a filter based on its index
                        AbstractFilter* operator[]( int i ) { return m_Filters[ i ]; }
                        
                        //overrides
                        bool canLogPayload() { return true; }
                        
                        AbstractFilter::FilterResult ProcessMessage( XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument* inputOutputData, NameValueCollection& transportHeaders, bool asClient );
                        AbstractFilter::FilterResult ProcessMessage( const XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument* inputData, AbstractFilter::buffer_type outputData, NameValueCollection& transportHeaders, bool asClient );
                        AbstractFilter::FilterResult ProcessMessage( AbstractFilter::buffer_type inputData, XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument* outputData, NameValueCollection& transportHeaders, bool asClient );
                        AbstractFilter::FilterResult ProcessMessage( AbstractFilter::buffer_type inputData, AbstractFilter::buffer_type outputData, NameValueCollection& transportHeaders, bool asClient );
                        
                        AbstractFilter::FilterResult ProcessMessage( const XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument* inputData, unsigned char** outputData, NameValueCollection& transportHeaders, bool asClient )
                        {
                                throw FilterInvalidMethod( AbstractFilter::XmlToBuffer );
                        }

                        AbstractFilter::FilterResult ProcessMessage( AbstractFilter::buffer_type inputData, unsigned char** outputData, NameValueCollection& transportHeaders, bool asClient )
                        {
                                throw FilterInvalidMethod( AbstractFilter::BufferToBuffer );
                        }

                        // return true if the filter can execute the requested operation in client/server context
                        bool isMethodSupported( FilterMethod method, bool asClient, bool untilNow = false );
                        
                        void Report( bool onlySupported = false, bool displayChain = false );
                        
                        void Rollback();
                        void Commit();
                        void Abort();
                        
                private :
                
                        vector< AbstractFilter* > m_Filters;
                        
                        map< AbstractFilter::FilterMethod, vector< AbstractFilter::FilterMethod >* > m_CompiledChainsAsClient;
                        map< AbstractFilter::FilterMethod, vector< AbstractFilter::FilterMethod >* > m_CompiledChainsAsServer;
                        
                        bool BuildChain( AbstractFilter::FilterMethod method, AbstractFilter::FilterMethod chainMethod, bool asClient, const unsigned int index = 0 );
                        void BuildChains();
                        
                        bool isFirstFilter( int index ) const { return index == 0; }
                        bool isLastFilter( int index ) const { return index == m_Filters.size() - 1; }
                        
                        //FilterMethod getFilterMethod( const int filterIndex ) const;
        };
}

#endif // FILTERCHAIN_H