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funccallstreamer.cpp

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//============================================================================= 
//
// XDFLengine library
//
//-----------------------------------------------------------------------------
//  FUNCCALLSTREAMER.CPP
//-----------------------------------------------------------------------------
//_____________________________________________________________________________
//
//  Copyright (C) 2003 Guillaume Baurand. All Rights Reserved.
//
//  This file is part of the XDFLengine project.
//
//  The XDFLengine 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.
//
//  For more information, 
//      contact  : guillaume@baurand.net 
//      or visit : http://xdflengine.sourceforge.net
//
//=============================================================================

#   include "funccallstreamer.hpp"
#   include "processor/xmlprocessor.hpp"
#   include "processor/xmlflowcontext.hpp"


BEGIN_XDFLENGINE_NS

//=============================================================================
//  CLASS FUNCCALLSTREAMER
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

// CONSTRUCTOR & DESTRUCTOR

    //_____________________________________________________________________
    //  FUNCCALLSTREAMER
    //---------------------------------------------------------------------
    FuncCallStreamer::FuncCallStreamer( const XMLStreamerFactory* p_pParent, StreamerParams* p_pParameters, XMLFlowContext* p_pContext, XMLStreamConsumer* p_pOutput)
    :XMLStreamer( p_pParent, p_pParameters, p_pContext, p_pOutput)
    {
        DEBUG_CREATE(FuncCallStreamer)
        m_pScriptParamBuffer = 0;
    }
    
    //_____________________________________________________________________
    //  ~FUNCCALLSTREAMER
    //---------------------------------------------------------------------     
    FuncCallStreamer::~FuncCallStreamer()
    {
        DEBUG_DEL(FuncCallStreamer)
    }
    
// STREAM   

    //_____________________________________________________________________
    //  INITSTREAM
    //---------------------------------------------------------------------
    bool FuncCallStreamer::initStream()
    {
        
        DEBUG_IN(FuncCallStreamer::initStream)

        m_pScriptParamBuffer = m_pContext->getProcessor() -> getNewBuffer();

        DEBUG_OUT(FuncCallStreamer::initStream)

        return true;
    }

    //_____________________________________________________________________
    //  WRITEDATA
    //---------------------------------------------------------------------
    void FuncCallStreamer::writeData( const char*   p_pszData, unsigned int p_uiDataLen)
    {
        DEBUG_IN(FuncCallStreamer::writeData)

        m_pScriptParamBuffer -> writeData( p_pszData, p_uiDataLen);

        DEBUG_OUT(FuncCallStreamer::writeData)
    }

    //_____________________________________________________________________
    //  COMMITSTREAM
    //---------------------------------------------------------------------
    bool FuncCallStreamer::commitStream(bool p_fFinal)
    {
        //-----------------------------------------------------------------
        XMLFlowContext* l_pScriptContext=0;
        const RootStreamNode* l_pScriptRoot;
        unsigned int i;
        const char* l_pszScriptName;
        //-----------------------------------------------------------------

        PREP_CATCH_XML_FLOW_ERROR;

        l_pszScriptName = getParamValue( m_pParameters, FUNCCALLSTREAMER_NAME,"");
        if(p_fFinal )
        {
            // get compiles script
            l_pScriptRoot = ((FuncCallStreamerFactory*) m_pParent)->getCachedScript(l_pszScriptName);
            if(!l_pScriptRoot) THROW_XMLFLOW_EXCEPTION( ERRCODE_LOC_FUNCCALLSTREAMER + ERRCODE_CAUSE_MISSINGREF , "Function not found." , l_pszScriptName, "FuncCallStreamer::commitStream", "", false );

            l_pScriptContext = new XMLFlowContext( m_pContext->getProcessor(), m_pContext, m_pContext->getThreadId(), m_pContext->getEncoding());
            
            // copy parameters to child context
            for( i=0; i<m_pParameters->size(); i++) l_pScriptContext->addParameter( m_pParameters->getKey(i), m_pParameters->get(i));

            WATCH_XML_FLOW_ERROR
            {
                logout << "\t" << FUNCCALLSTREAMER_TAGNAME<< "   :   " << "Call function " << l_pszScriptName << "...\n";
                l_pScriptContext->addNamedBuffer( FUNCCALLSTREAMER_BUFINPUT, m_pScriptParamBuffer);
                m_pContext->getProcessor()->execute( l_pScriptRoot , m_pOutput, l_pScriptContext);
            }
            CATCH_XML_FLOW_ERROR_RELEASE_AND_RETURN

        }

    RELEASE_AND_RETURN:
        if(p_fFinal )
        {
            l_pScriptContext->removeNamedBuffer(FUNCCALLSTREAMER_BUFINPUT);
            delete m_pScriptParamBuffer;
            delete l_pScriptContext;
        }
        ON_XML_FLOW_ERROR_THROW;
        return false;
    }




//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//=============================================================================


//=============================================================================
//  CLASS FuncCallStreamerFactory
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


    //_____________________________________________________________________
    //  ~FuncCallStreamerFactory
    //---------------------------------------------------------------------
    FuncCallStreamerFactory::~FuncCallStreamerFactory()
    {
        while(!m_pvaScriptCache.empty()) delete m_pvaScriptCache.pop();
    }

    //_____________________________________________________________________
    //  getStreamer
    //---------------------------------------------------------------------
    XMLStreamer* FuncCallStreamerFactory::getStreamer(
        StreamerParams*         p_pParameters, 
        XMLFlowContext* p_pStreamContext, 
        XMLStreamConsumer*      p_pStreamConsumer) const
    {
        return (XMLStreamer*) new FuncCallStreamer( this, p_pParameters, p_pStreamContext, p_pStreamConsumer);
    }


    //_____________________________________________________________________
    //  CACHESCRIPT
    //---------------------------------------------------------------------
    void FuncCallStreamerFactory::cacheScript( RootStreamNode* p_pRootNode, const char* p_pszCacheName)
    {
        m_pvaScriptCache.add( p_pRootNode, p_pszCacheName);
    }

    //_____________________________________________________________________
    //  GETCACHEDSCRIPT
    //---------------------------------------------------------------------
    const RootStreamNode* FuncCallStreamerFactory::getCachedScript( const char* p_pszCacheName)
    {
        return m_pvaScriptCache.get( p_pszCacheName);
    }

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//=============================================================================


END_XDFLENGINE_NS

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