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#ifndef PCL_ML_DT_DECISION_FOREST_EVALUATOR_H_
#define PCL_ML_DT_DECISION_FOREST_EVALUATOR_H_

#include <pcl/common/common.h>

#include <pcl/ml/dt/decision_tree_evaluator.h>
#include <pcl/ml/dt/decision_forest.h>
#include <pcl/ml/feature_handler.h>
#include <pcl/ml/stats_estimator.h>

#include <vector>

namespace pcl
{

  /** \brief Utility class for evaluating a decision forests. */
  template <
    class FeatureType,
    class DataSet,
    class LabelType,
    class ExampleIndex,
    class NodeType >
  class DecisionForestEvaluator
  {
    public:
      /** \brief Constructor. */
      DecisionForestEvaluator();
      /** \brief Destructor. */
      virtual 
      ~DecisionForestEvaluator();

      /** \brief Evaluates the specified examples using the supplied forest. 
        * \param[in] DecisionForestEvaluator The decision forest.
        * \param[in] feature_handler The feature handler used to train the tree.
        * \param[in] stats_estimator The statistics estimation instance used while training the tree.
        * \param[in] data_set The data set used for evaluation.
        * \param[in] examples The examples that have to be evaluated.
        * \param[out] label_data The destination for the resulting label data.
        */
      void
      evaluate (pcl::DecisionForest<NodeType> & DecisionForestEvaluator,
                pcl::FeatureHandler<FeatureType, DataSet, ExampleIndex> & feature_handler,
                pcl::StatsEstimator<LabelType, NodeType, DataSet, ExampleIndex> & stats_estimator,
                DataSet & data_set,
                std::vector<ExampleIndex> & examples,
                std::vector<LabelType> & label_data);

     /** \brief Evaluates a specific patch using the supplied forest.
       * \param[in] DecisionForestEvaluator The decision forest.
       * \param[in] feature_handler The feature handler used to train the tree.
       * \param[in] stats_estimator The statistics estimation instance used while training the tree.
       * \param[in] data_set The data set used for evaluation.
       * \param[in] example The examples that have to be evaluated.
       * \param[out] leaves The leaves where the patch arrives
       */
      void
      evaluate (pcl::DecisionForest<NodeType> & DecisionForestEvaluator,
                pcl::FeatureHandler<FeatureType, DataSet, ExampleIndex> & feature_handler,
                pcl::StatsEstimator<LabelType, NodeType, DataSet, ExampleIndex> & stats_estimator,
                DataSet & data_set,
                ExampleIndex example,
                std::vector<NodeType> & leaves);
    
    private:
      /** \brief Evaluator for decision trees. */
      DecisionTreeEvaluator<FeatureType, DataSet, LabelType, ExampleIndex, NodeType> tree_evaluator_;
  };

}

#include <pcl/ml/impl/dt/decision_forest_evaluator.hpp>

#endif
