SerializationExamples.cpp

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#include "SerializationExamples.h"

// TerraLib
#include <terralib/fe.h>
#include <terralib/se.h>
#include <terralib/fe/serialization/xml/Filter.h>
#include <terralib/se/serialization/xml/Style.h>
#include <terralib/xlink/serialization/xml/XLinkSerializer.h>
#include <terralib/xml/AbstractWriter.h>
#include <terralib/xml/AbstractWriterFactory.h>
#include <terralib/xml/Reader.h>
#include <terralib/xml/ReaderFactory.h>
#include <terralib/xlink/SimpleLink.h>

// STL
#include <cassert>
#include <sstream>

void EncodeStyle(const std::string& path)
{
  /* Creating an OGC Symbology Enconding Style */

  // Creates a PolygonSymbolizer
  te::se::Stroke* strokePolygon = te::se::CreateStroke("#000000", "2", "0.5", "2 3 2 3", "square", "miter");
  te::se::Fill* fillPolygon = te::se::CreateFill("#FF8C00", "1.0");
  te::se::PolygonSymbolizer* ps = te::se::CreatePolygonSymbolizer(strokePolygon, fillPolygon);
  ps->setGeometry(new te::fe::PropertyName("area"));
  ps->setDescription(te::se::CreateDescription("A simple polygon symbolizer example", "This symbolizer was created to show the power of TerraLib serialization module."));

  // Creates a PolygonSymbolizer with GraphicFill
  te::se::Mark* markGraphicFill = te::se::CreateMark("circle", te::se::CreateStroke("#000000", "1"), te::se::CreateFill("#FFFF00", "1.0"));
  te::se::Graphic* graphicFill = te::se::CreateGraphic(markGraphicFill, "8", "45", "1.0");
  te::se::Fill* fillWithGraphicFill = te::se::CreateFill(graphicFill);
  te::se::PolygonSymbolizer* psGraphicFill = te::se::CreatePolygonSymbolizer(0, fillWithGraphicFill);

  // Creates a LineSymbolizer
  te::se::Stroke* strokeLine = te::se::CreateStroke("#FF0000", "1");
  te::se::LineSymbolizer* ls = te::se::CreateLineSymbolizer(strokeLine);
  ls->setGeometry(new te::fe::PropertyName("centerline"));
  ls->setDescription(te::se::CreateDescription("A simple line symbolizer example", "This symbolizer was created to show the power of TerraLib serialization module."));

  // Creates a PointSymbolizer
  te::se::Mark* mark = te::se::CreateMark("star", te::se::CreateStroke("#000000", "1"), te::se::CreateFill("#FFFF00", "1.0"));
  te::se::Graphic* graphic = te::se::CreateGraphic(mark, "8", "45", "1.0");
  te::se::PointSymbolizer* pts = te::se::CreatePointSymbolizer(graphic);
  pts->setGeometry(new te::fe::PropertyName("location"));
  pts->setDescription(te::se::CreateDescription("A simple point symbolizer example", "This symbolizer was created to show the power of TerraLib serialization module."));

  // Creates a TextSymbolizer
  te::se::TextSymbolizer* ts = te::se::CreateTextSymbolizer("location", te::se::CreateFill("#000000", "1.0"), te::se::CreateFont("Arial", "12", te::se::Font::StyleNormal, te::se::Font::WeightBold)); 
  ts->setGeometry(new te::fe::PropertyName("location"));
  ts->setDescription(te::se::CreateDescription("A simple text symbolizer example", "This symbolizer was created to show the power of TerraLib serialization module."));

  // Creates a RasterSymbolizer
  te::se::SelectedChannel* scR = new te::se::SelectedChannel;
  scR->setSourceChannelName("0");
  te::se::SelectedChannel* scG = new te::se::SelectedChannel;
  scG->setSourceChannelName("1");
  te::se::SelectedChannel* scB = new te::se::SelectedChannel;
  scB->setSourceChannelName("2");

  te::se::ChannelSelection* cs = new te::se::ChannelSelection;
  cs->setColorCompositionType(te::se::RGB_COMPOSITION);
  cs->setRedChannel(scR);
  cs->setGreenChannel(scG);
  cs->setBlueChannel(scB);

  te::se::Categorize* categorize = new te::se::Categorize;
  categorize->setThresholdsBelongTo(te::se::Categorize::PRECEDING);
  categorize->setFallbackValue("0");
  categorize->setLookupValue(new te::se::ParameterValue("Rasterdata"));
  categorize->addValue(new te::se::ParameterValue("#00FF00"));
  categorize->addThreshold(new te::se::ParameterValue("-417"));
  categorize->addValue(new te::se::ParameterValue("#00FA00"));
  categorize->addThreshold(new te::se::ParameterValue("-333"));
  categorize->addValue(new te::se::ParameterValue("#14F500"));
  categorize->addThreshold(new te::se::ParameterValue("-250"));
  categorize->addValue(new te::se::ParameterValue("#28F502"));
  categorize->addThreshold(new te::se::ParameterValue("-167"));
  categorize->addValue(new te::se::ParameterValue("#3CF505"));

  te::se::ColorMap* colorMap = new te::se::ColorMap;
  colorMap->setCategorize(categorize);

  te::se::RasterSymbolizer* rs = new te::se::RasterSymbolizer;
  rs->setOpacity(new te::se::ParameterValue("1.0"));
  rs->setGain(new te::se::ParameterValue("1.0"));
  rs->setOffset(new te::se::ParameterValue("0.0"));
  rs->setChannelSelection(cs);
  rs->setColorMap(colorMap);
  rs->setDescription(te::se::CreateDescription("A simple raster symbolizer example", "This symbolizer was created to show the power of TerraLib serialization module."));

  // Creates a Rule
  te::se::Rule* rule = new te::se::Rule;
  rule->setName(new std::string("Rule 1"));
  rule->setMinScaleDenominator(250e3);
  rule->setMaxScaleDenominator(5e6);
  rule->push_back(ps);
  rule->push_back(psGraphicFill);
  rule->push_back(ls);
  rule->push_back(pts);
  rule->push_back(ts);
  rule->push_back(rs);
  rule->setDescription(te::se::CreateDescription("A simple rule example", "This rule was created to show the power of TerraLib serialization module."));

  /* Creating an OGC Filter Expression to Rule */
  
  // (1): nome = 'MINAS GERAIS'
  te::fe::PropertyName* state = new te::fe::PropertyName("state");
  te::fe::Literal* stateName = new te::fe::Literal("MINAS GERAIS");
  te::fe::BinaryComparisonOp* stateEqual = new te::fe::BinaryComparisonOp(te::fe::Globals::sm_propertyIsEqualTo, state, stateName);

  // (2): populacao < '2.000'
  te::fe::PropertyName* pop = new te::fe::PropertyName("population");
  te::fe::Literal* popValue = new te::fe::Literal("2.000");
  te::fe::BinaryComparisonOp* popLessThan = new te::fe::BinaryComparisonOp(te::fe::Globals::sm_propertyIsLessThan, pop, popValue);

  // (3): Joins the expression (1) and (2) using a binary logic operator AND
  te::fe::BinaryLogicOp* andOp = new te::fe::BinaryLogicOp(te::fe::Globals::sm_and, stateEqual, popLessThan);

  // (4): cidade = 'SERITINGA'
  te::fe::PropertyName* city = new te::fe::PropertyName("city");
  te::fe::Literal* cityName = new te::fe::Literal("SERITINGA");
  te::fe::BinaryComparisonOp* cityEqual = new te::fe::BinaryComparisonOp(te::fe::Globals::sm_propertyIsEqualTo, city, cityName);
  
  // (5): Joins the expression (3) and (4) using a binary logic operator OR
  te::fe::BinaryLogicOp* orOp = new te::fe::BinaryLogicOp(te::fe::Globals::sm_or, andOp, cityEqual);

  // We have a Filter!
  te::fe::Filter* filter = new te::fe::Filter;
  filter->setOp(orOp); // (state = 'MINAS GERAIS' AND populacao < '2.000') OR (city = 'SERITINGA')

  rule->setFilter(filter);

  // We have a Style!
  te::se::Style* style = new te::se::FeatureTypeStyle;
  style->push_back(rule);
  style->setName(new std::string("Style 1"));
  style->setDescription(te::se::CreateDescription("A simple style example", "This style was created to show the power of TerraLib serialization module."));

  std::unique_ptr<te::xml::AbstractWriter> writer(te::xml::AbstractWriterFactory::make());

  writer->setURI(path);

  writer->writeStartDocument("UTF-8", "no");

  writer->setRootNamespaceURI("http://www.opengis.net/se");

  te::se::serialize::Style::getInstance().write(style, *writer.get());

  writer->writeToFile();

  delete style;
}

te::se::Style* DecodeStyle(const std::string& path)
{
  te::xml::Reader* reader = te::xml::ReaderFactory::make("XERCES");
  reader->read(path);
  reader->next();

  te::se::Style* style = te::se::serialize::Style::getInstance().read(*reader);

  return style;
}