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#include <mbgl/style/expression/expression.hpp>
#include <mbgl/style/expression/compound_expression.hpp>
#include <mbgl/tile/geometry_tile_data.hpp>
namespace mbgl {
namespace style {
namespace expression {
class GeoJSONFeature : public GeometryTileFeature {
public:
const Feature& feature;
GeoJSONFeature( const Feature& feature_) : feature(feature_) {}
FeatureType getType() const override {
return apply_visitor(ToFeatureType(), feature.geometry);
}
PropertyMap getProperties() const override { return feature.properties; }
FeatureIdentifier getID() const override { return feature.id; }
GeometryCollection getGeometries() const override { return {}; }
optional<mbgl::Value> getValue(const std::string& key) const override {
auto it = feature.properties.find(key);
if (it != feature.properties.end()) {
return optional<mbgl::Value>(it->second);
}
return optional<mbgl::Value>();
}
};
EvaluationResult Expression::evaluate(optional<float> zoom, const Feature& feature, optional<double> colorRampParameter) const {
GeoJSONFeature f(feature);
return this->evaluate(EvaluationContext(zoom, &f, colorRampParameter));
}
EvaluationResult Expression::evaluate(optional<double> accumulated, const Feature& feature) const{
GeoJSONFeature f(feature);
return this->evaluate(EvaluationContext(accumulated,&f));
}
} // namespace expression
} // namespace style
} // namespace mbgl
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