Transforms/TransformBuilder.cpp

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/*
 * (C) Copyright 2020 NOAA/NWS/NCEP/EMC
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 */
 
#include "TransformBuilder.h"
 
#include "eckit/exception/Exceptions.h"
 
#include "ScalingTransform.h"
#include "OffsetTransform.h"
 
 
static const char* TRANSFORMS_SECTION = "transforms";
static const char* OFFSET_KEY = "offset";
static const char* SCALE_KEY = "scale";
 
namespace Ingester
{
    std::shared_ptr<Transform> TransformBuilder::makeTransform(const eckit::Configuration& conf)
    {
        std::shared_ptr <Transform> transform;
        if (conf.has(OFFSET_KEY))
        {
            transform = std::make_shared<OffsetTransform>(conf.getFloat(OFFSET_KEY));
        }
        else if (conf.has(SCALE_KEY))
        {
            transform = std::make_shared<ScalingTransform>(conf.getFloat(SCALE_KEY));
        }
        else
        {
            throw eckit::BadParameter("Tried to create unknown export transform type. "
                                      "Check your configuration.");
        }
 
        return transform;
    }
 
    Transforms TransformBuilder::makeTransforms(const eckit::Configuration& conf)
    {
        Transforms transforms;
        if (conf.has(TRANSFORMS_SECTION))
        {
            for (const auto& transformConf : conf.getSubConfigurations(TRANSFORMS_SECTION))
            {
                transforms.push_back(makeTransform(transformConf));
            }
        }
 
        return transforms;
    }
}  // namespace Ingester