/*
 * Software License Agreement (BSD License)
 *
 *  Point Cloud Library (PCL) - www.pointclouds.org
 *  Copyright (c) 2010-2011, Willow Garage, Inc.
 *
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 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
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 */

#pragma once

#include <pcl/common/common.h>
#include <pcl/memory.h>
#include <pcl/pcl_macros.h> // for PCL_EXPORTS

namespace pcl {
template <class FeatureType,
          class DataSet,
          class LabelType,
          class ExampleIndex,
          class NodeType>
class PCL_EXPORTS DecisionTreeTrainerDataProvider {

  /** The training data set. */
  DataSet data_set_;
  /** The label data. */
  std::vector<LabelType> label_data_;

public:
  using Ptr = shared_ptr<DecisionTreeTrainerDataProvider<FeatureType,
                                                         DataSet,
                                                         LabelType,
                                                         ExampleIndex,
                                                         NodeType>>;
  using ConstPtr = shared_ptr<const DecisionTreeTrainerDataProvider<FeatureType,
                                                                    DataSet,
                                                                    LabelType,
                                                                    ExampleIndex,
                                                                    NodeType>>;

  /** Constructor. */
  DecisionTreeTrainerDataProvider() {}

  /** Destructor. */
  ~DecisionTreeTrainerDataProvider() {}

  /** Virtual function called to obtain training examples and labels before
   *  training a specific tree */
  virtual void
  getDatasetAndLabels(DataSet& data_set,
                      std::vector<LabelType>& label_data,
                      std::vector<ExampleIndex>& examples) = 0;
};

} // namespace pcl
