PolygonToLineOp.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 PolygonToLineOp.cpp
 */

// Terralib
#include "../datatype/Enums.h"
#include "../datatype/Property.h"

#include "../geometry/Enums.h"
#include "../geometry/GeometryProperty.h"

#include "PolygonToLineOp.h"

// STL
#include <vector>

te::vp::PolygonToLineOp::PolygonToLineOp():
  m_outDset("")
{
}

void te::vp::PolygonToLineOp::setInput(te::da::DataSourcePtr inDsrc,
                                     std::string inDsetName,
                                     const te::da::ObjectIdSet* oidSet)
{
  m_inDsrc = inDsrc;
  m_inDsetName = inDsetName;
  m_oidSet = oidSet;
}

void te::vp::PolygonToLineOp::setOutput(te::da::DataSourcePtr outDsrc, std::string dsname)
{
  m_outDsrc = outDsrc;
  m_outDset = dsname;
}

std::auto_ptr<te::da::DataSetType> te::vp::PolygonToLineOp::buildOutDataSetType()
{
  std::auto_ptr<te::da::DataSetType> inDsType = m_inDsrc->getDataSetType(m_inDsetName);
  std::auto_ptr<te::da::DataSetType> outDsType(new te::da::DataSetType(m_outDset));

  std::string dSourceType = m_outDsrc->getType();

  std::vector<te::dt::Property*> vecProps = inDsType->getProperties();

  std::vector<te::dt::Property*> inPk = inDsType->getPrimaryKey()->getProperties();
  std::string namePk = m_outDset;

  for (std::size_t p = 0; p < inPk.size(); ++p)
    namePk += "_" + inPk[p]->getName();

  te::da::PrimaryKey* pk = new te::da::PrimaryKey(namePk + "_pk");

  if(dSourceType == "OGR")
  {
    for(std::size_t i = 0; i < vecProps.size(); ++i)
    {
      if(vecProps[i]->getType() != te::dt::GEOMETRY_TYPE && vecProps[i]->getName() != "FID")
      {
        outDsType->add(vecProps[i]->clone());
      }
      else
      if(vecProps[i]->getType() == te::dt::GEOMETRY_TYPE)
      {
        te::gm::GeometryProperty* inGeom = static_cast<te::gm::GeometryProperty*>(vecProps[i]);
        te::gm::GeometryProperty* outGeom = new te::gm::GeometryProperty(inGeom->getName());
        outGeom->setGeometryType(te::gm::MultiLineStringType);
        outGeom->setSRID(inGeom->getSRID());
        outDsType->add(outGeom);
      }
    }
  }
  else
  {
    for(std::size_t i = 0; i < vecProps.size(); ++i)
    {
      if(vecProps[i]->getType() != te::dt::GEOMETRY_TYPE)
      {
        outDsType->add(vecProps[i]->clone());

        for (std::size_t j = 0; j < inPk.size(); ++j)
        {
          if (outDsType->getProperty(i)->getName() == inPk[j]->getName())
            pk->add(outDsType->getProperty(i));
        }
      }
      else
      {
        te::gm::GeometryProperty* inGeom = static_cast<te::gm::GeometryProperty*>(vecProps[i]);
        te::gm::GeometryProperty* outGeom = new te::gm::GeometryProperty(inGeom->getName());
        outGeom->setGeometryType(te::gm::MultiLineStringType);
        outGeom->setSRID(inGeom->getSRID());
        outDsType->add(outGeom);
      }
    }
  }

  outDsType->setPrimaryKey(pk);
  
  return outDsType;
}

te::gm::GeomType te::vp::PolygonToLineOp::getGeomResultType(te::gm::GeomType geom)
{
  if (geom == te::gm::PolygonType)
    return te::gm::MultiPolygonType;
  
  if (geom == te::gm::LineStringType)
    return te::gm::MultiLineStringType;
  
  if (geom == te::gm::PointType)
    return te::gm::MultiPointType;
  
  return geom;
}

bool te::vp::PolygonToLineOp::paramsAreValid()
{
  if (!m_inDsrc.get())
    return false;

  if (m_inDsetName.empty())
    return false;

  if (m_outDset.empty() || !m_outDsrc.get())
    return false;

  return true;
}