src/terralib/postgis/Plugin.cpp

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/*
  Copyright (C) 2008 National Institute For Space Research (INPE) - Brazil.

  This file is part of the TerraLib - a Framework for building GIS enabled
  applications.

  TerraLib 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 3 of the License,
  or (at your option) any later version.

  TerraLib 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 TerraLib. See COPYING. If not, write to
  TerraLib Team at <terralib-team@terralib.org>.
 */

/*!
  \file terralib/postgis/Plugin.cpp

  \brief Plugin interface for dynamic loading of Postgis Driver for TerraLib.
*/

// TerraLib
#include "../core/logger/Logger.h"
#include "../core/plugin/CppPlugin.h"
#include "../core/translator/Translator.h"
#include "../core/utils/Platform.h"
#include "../dataaccess/datasource/DataSourceCapabilities.h"
#include "../dataaccess/datasource/DataSourceFactory.h"
#include "../dataaccess/datasource/DataSourceManager.h"
#include "../dataaccess/query/BinaryOpEncoder.h"
#include "../dataaccess/query/FunctionEncoder.h"
#include "../dataaccess/query/SQLDialect.h"
#include "../dataaccess/query/SQLFunctionEncoder.h"
#include "../dataaccess/query/TemplateEncoder.h"
#include "../dataaccess/query/UnaryOpEncoder.h"
#include "../dataaccess/serialization/xml/Serializer.h"
#include "DataSource.h"
#include "DataSourceFactory.h"
#include "Globals.h"

// Boost
#include <boost/filesystem.hpp>
namespace te
{
  namespace pgis
  {
    TERRALIB_CPP_PLUGIN_BEGIN(Plugin)

    TERRALIB_CPP_PLUGIN_STARTUP
    {
      if(m_initialized)
        return;

      // Register the data source factory
      te::da::DataSourceFactory::add("POSTGIS", te::pgis::Build);

      // retrieve the Capabilities
      std::string capabilitiesFile = te::core::FindInTerraLibPath(
          "share/terralib/plugins/postgis-capabilities.xml");

      te::pgis::Globals::sm_capabilities = new te::da::DataSourceCapabilities();
      te::pgis::Globals::sm_queryDialect = new te::da::SQLDialect();

      te::serialize::xml::Read(capabilitiesFile,
                               *te::pgis::Globals::sm_capabilities,
                               *te::pgis::Globals::sm_queryDialect);

      TE_LOG_INFO(TE_TR("TerraLib PostGIS driver support initialized!"));

      m_initialized = true;
    }

    TERRALIB_CPP_PLUGIN_SHUTDOWN
    {
      if(!m_initialized)
        return;

      // Unregister the PostGIS factory support.
      te::da::DataSourceFactory::remove("POSTGIS");

      // Free the PostGIS registered drivers
      te::da::DataSourceManager::getInstance().detachAll(
          PGIS_DRIVER_IDENTIFIER);

      TE_LOG_INFO(TE_TR("TerraLib PostGIS driver shutdown!"));

      m_initialized = false;
    }

    TERRALIB_CPP_PLUGIN_END(te::pgis::Plugin)
  }
}