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execstreamer.cpp

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//============================================================================= 
//
// XDFLengine library
//
//-----------------------------------------------------------------------------
//  EXECSTREAMER.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 "execstreamer.hpp"
#   include "processor/xmlprocessor.hpp"
#   include "processor/xmlflowcontext.hpp"


BEGIN_XDFLENGINE_NS

//=============================================================================
//  CLASS EXECSTREAMER
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

// CONSTRUCTOR & DESTRUCTOR

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

    //_____________________________________________________________________
    //  INITSTREAM
    //---------------------------------------------------------------------
    bool ExecStreamer::initStream()
    {
        //-----------------------------------------------------------------
        const char* l_pszFileName;
        //-----------------------------------------------------------------

        DEBUG_IN(ExecStreamer::initStream)

        m_pszBufferName = getParamValue( m_pParameters, EXECSTREAMER_NAME,"");
        l_pszFileName = getParamValue( m_pParameters, EXECSTREAMER_FILENAME,"");
        m_fIsolateContext=true;
        if( strcmp( getParamValue( m_pParameters, EXECSTREAMER_ISOLATE, EXECSTREAMER_ISOLATE_DEF), REQ_FALSE)==0) m_fIsolateContext=false;

        if(strlen(m_pszBufferName)==0)
        {
            // create new buffer of given type
            if( strlen(l_pszFileName)==0)
            {
                m_pScriptBuffer = m_pContext->getProcessor() -> getNewBuffer();
            }
            else
            {
                m_pScriptBuffer = m_pContext->getProcessor() -> getNewBuffer( XMLPROCESSOR_FILE, l_pszFileName, false);
            }

            m_fOwnBuffer = true;
            m_pszBufferName = 0;
        }
        else
        {
            m_pScriptBuffer = m_pContext -> getNamedBuffer( m_pszBufferName);
            m_fOwnBuffer = false;
        }

        if( !m_pScriptBuffer) THROW_XMLFLOW_EXCEPTION ( ERRCODE_LOC_EXECSTREAMER + ERRCODE_CAUSE_MISSINGREF , "Script buffer not found.", "",  "ExecStreamer::initStream", "", false );

        DEBUG_OUT(ExecStreamer::initStream)

        return true;
    }

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

        m_pScriptBuffer -> writeData( p_pszData, p_uiDataLen);

        DEBUG_OUT(ExecStreamer::writeData)
    }

    //_____________________________________________________________________
    //  COMMITSTREAM
    //---------------------------------------------------------------------
    bool ExecStreamer::commitStream(bool p_fFinal)
    {
        XMLFlowContext* l_pScriptContext=0;
        PREP_CATCH_XML_FLOW_ERROR;

        if(p_fFinal)
        {
            if(m_fIsolateContext) l_pScriptContext = new XMLFlowContext( m_pContext->getProcessor(), m_pContext, m_pContext->getThreadId(), m_pContext->getEncoding());
            else l_pScriptContext = m_pContext;

            WATCH_XML_FLOW_ERROR
            {

                m_pContext->getProcessor()->process( m_pScriptBuffer , m_pOutput, l_pScriptContext);
            }
            CATCH_XML_FLOW_ERROR_RELEASE_AND_RETURN
        }

    RELEASE_AND_RETURN:
        if(p_fFinal )
        {
            if(m_fOwnBuffer) delete m_pScriptBuffer;
            if(m_fIsolateContext) delete l_pScriptContext;
        }
        ON_XML_FLOW_ERROR_THROW;
        return false;
    }

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


//=============================================================================
//  CLASS ExecStreamerFactory
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    XMLStreamer* ExecStreamerFactory::getStreamer(
        StreamerParams*         p_pParameters, 
        XMLFlowContext* p_pStreamContext, 
        XMLStreamConsumer*      p_pStreamConsumer) const
    {
        return (XMLStreamer*) new ExecStreamer( this, p_pParameters, p_pStreamContext, p_pStreamConsumer);
    }

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


END_XDFLENGINE_NS

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