Categorize.cpp

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/*  Copyright (C) 2011-2011 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/serialization/se/Categorize.cpp
 
  \brief Support for Categorize serialization.
*/

// TerraLib
#include "../../se/Categorize.h"
#include "../../xml/Reader.h"
#include "../../xml/Writer.h"
#include "Categorize.h"
#include "ParameterValue.h"
#include "Utils.h"

// STL
#include <cassert>
#include <memory>
#include <vector>

te::se::Categorize* te::serialize::ReadCategorize(te::xml::Reader& reader)
{
  assert(reader.getNodeType() == te::xml::START_ELEMENT);
  assert(reader.getElementLocalName() == "Categorize");

  assert(reader.hasAttrs());

  std::auto_ptr<te::se::Categorize> c(new te::se::Categorize);

  // FallBackValue Attribute
  std::string fbv = reader.getAttr("fallbackValue");
  assert(!fbv.empty());
  c->setFallbackValue(fbv);

  // ThreshholdsBelongTo Attribute
  std::string tbt = reader.getAttr("threshholdsBelongTo");
  assert(!tbt.empty() && (tbt == "preceding" || tbt == "succeeding"));
  tbt == "preceding" ? c->setThresholdsBelongTo(te::se::Categorize::PRECEDING) : c->setThresholdsBelongTo(te::se::Categorize::SUCCEEDING);

  reader.next();

  // LookupValue
  assert(reader.getElementLocalName() == "LookupValue");
  reader.next();
  c->setLookupValue(ReadParameterValue(reader));

  // Value
  assert(reader.getElementLocalName() == "Value");
  reader.next();
  c->addValue(ReadParameterValue(reader));

  // Threshold + Value
  while(reader.getNodeType() == te::xml::START_ELEMENT &&
        reader.getElementLocalName() == "Threshold")
  {
    reader.next();
    c->addThreshold(ReadParameterValue(reader));

    assert(reader.getElementLocalName() == "Value");
    reader.next();
    c->addValue(ReadParameterValue(reader));
  }

  assert(reader.getNodeType() == te::xml::END_ELEMENT);
  reader.next();

  return c.release();
}

void te::serialize::Save(const te::se::Categorize* c, te::xml::Writer& writer)
{
  if(c == 0)
    return;

  writer.writeStartElement("se:Categorize");

  writer.writeAttribute("fallbackValue", c->getFallbackValue());

  te::se::Categorize::ThresholdsBelongToType type = c->getThresholdsBelongTo();
  switch(type)
  {
    case te::se::Categorize::NONE:
    break;

    case te::se::Categorize::PRECEDING:
      writer.writeAttribute("threshholdsBelongTo", "preceding");
    break;

    case te::se::Categorize::SUCCEEDING:
      writer.writeAttribute("threshholdsBelongTo", "succeeding");
    break;  
  }

  WriteParameterValuePtrHelper("se:LookupValue", c->getLookupValue(), writer);
  WriteParameterValuePtrHelper("se:Value", c->getValue(), writer);

  std::vector<te::se::ParameterValue*> thresholds = c->getThresholds();
  std::vector<te::se::ParameterValue*> values = c->getThresholdValues();
  assert(thresholds.size() == values.size()-1);

  for(std::size_t i = 0; i < values.size(); ++i)
  {
    WriteParameterValuePtrHelper("se:Value", values[i], writer);

    if(i != values.size()-1)
      WriteParameterValuePtrHelper("se:Threshold", thresholds[i], writer);
  }

  writer.writeEndElement("se:Categorize");
}