Module.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/gdal/Module.h
   
  \brief The TerraLib OGR driver is a plugin.
*/

// TerraLib
#include "../common/Logger.h"
#include "../plugin/PluginInfo.h"
#include "../common/Translator.h"
#include "../dataaccess/datasource/DataSourceCapabilities.h"
#include "../dataaccess/datasource/DataSourceFactory.h"
#include "../dataaccess/datasource/DataSourceManager.h"
#include "Config.h"
#include "DataSourceFactory.h"
#include "Module.h"
#include "RasterFactory.h"
#include "Utils.h"

// GDAL
#include <gdal_priv.h>

te::gdal::Module::Module(const te::plugin::PluginInfo& pluginInfo)
  : te::plugin::Plugin(pluginInfo)
{
}

te::gdal::Module::~Module()
{
}

void te::gdal::Module::startup()
{
  if(m_initialized)
    return;

  std::string gdal_data;

  char* tDir = getenv("TERRALIB_HOME");
  std::string teDir;

  if(tDir != 0)
    teDir = std::string(tDir);

  if(!teDir.empty())
    gdal_data = teDir + "/share/gdal-data";
  //}

  if(gdal_data.empty())
    gdal_data = TERRALIB_GDAL_DATA;

  if( ! gdal_data.empty() )
  {
    CPLSetConfigOption("GDAL_DATA", gdal_data.c_str());
  }
  CPLSetConfigOption("GDAL_PAM_ENABLED", "NO");

  te::da::DataSourceFactory::add(TE_GDAL_DRIVER_IDENTIFIER, te::gdal::Build);

  GDALAllRegister();

  RasterFactory::initialize();

  // DataType Capabilites
  te::da::DataTypeCapabilities dataTypeCapabilities;
  dataTypeCapabilities.setSupportRaster(true);

  // DataSetType Capabilites
  te::da::DataSetTypeCapabilities dataSetTypeCapabilities; // All false

  // DataSet Capabilities
  te::da::DataSetCapabilities dataSetCapabilities;
  dataSetCapabilities.setSupportEfficientDataSetSize(true);

  // Query Capabilities
  te::da::QueryCapabilities queryCapabilities; // All false

  // DataSouce Capabilities
  te::da::DataSourceCapabilities capabilities;
  capabilities.setSupportAll();
  capabilities.setSupportTransactions(false);
  capabilities.setDataTypeCapabilities(dataTypeCapabilities);
  capabilities.setDataSetTypeCapabilities(dataSetTypeCapabilities);
  capabilities.setDataSetCapabilities(dataSetCapabilities);
  capabilities.setQueryCapabilities(queryCapabilities);
  capabilities.setAccessPolicy(te::common::RWAccess);
  
  // Supported file extensions capability
  
  std::set< std::string > supportedExtensionsSet;
  for( std::map< std::string, DriverMetadata >::const_iterator it = 
    GetGDALDriversMetadata().begin() ; it != 
    GetGDALDriversMetadata().end() ; ++it )
  {
    if( !it->second.m_extension.empty() )
    {
      if( supportedExtensionsSet.find( it->second.m_extension ) ==
        supportedExtensionsSet.end() )
      {
        supportedExtensionsSet.insert( it->second.m_extension );
      }
    }
  }
  
  std::string supportedExtensionsStr;
  for( std::set< std::string >::const_iterator it = supportedExtensionsSet.begin() ; 
    it != supportedExtensionsSet.end() ; ++it )
  {
    if( !supportedExtensionsStr.empty() )
    {
      supportedExtensionsStr.append( ";" );
    }
    supportedExtensionsStr.append( *it );
  }  

  capabilities.addSpecificCapability( "SUPPORTED_EXTENSIONS", supportedExtensionsStr );

  te::gdal::DataSource::setCapabilities(capabilities);
  
  // initializing the static mutex
  getStaticMutex();
  
  TE_LOG_TRACE(TE_TR("TerraLib GDAL driver startup!"));

  m_initialized = true;
}

void te::gdal::Module::shutdown()
{
  if(!m_initialized)
    return;

//! it finalizes the GDAL factory support.
 te::da::DataSourceFactory::remove(TE_GDAL_DRIVER_IDENTIFIER);

  RasterFactory::finalize();

//! free GDAL registered drivers
  te::da::DataSourceManager::getInstance().detachAll(TE_GDAL_DRIVER_IDENTIFIER);
 
  TE_LOG_TRACE(TE_TR("TerraLib GDAL driver shutdown!"));

  m_initialized = false;
}

PLUGIN_CALL_BACK_IMPL(te::gdal::Module)