LeafNode.h

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/* -*- C++ -*- */
#ifndef _MADARA_LEAF_NODE_H_
#define _MADARA_LEAF_NODE_H_

#ifndef _MADARA_NO_KARL_

#include <string>
#include "madara/expression/ComponentNode.h"
#include "madara/knowledge/KnowledgeRecord.h"

namespace madara
{
  namespace expression
  {
    // Forward declarations.
    class Visitor;

    class LeafNode : public ComponentNode
    {
    public:
      LeafNode (logger::Logger & logger,
        const knowledge::KnowledgeRecord & item);
      
      LeafNode (logger::Logger & logger,
        madara::knowledge::KnowledgeRecord::Integer item);
      
      LeafNode (logger::Logger & logger,
        double item);

      LeafNode (logger::Logger & logger,
        const std::string &item);

      virtual ~LeafNode (void);

      virtual madara::knowledge::KnowledgeRecord item (void) const;

      virtual madara::knowledge::KnowledgeRecord prune (bool & can_change);

      virtual madara::knowledge::KnowledgeRecord evaluate (
        const madara::knowledge::KnowledgeUpdateSettings & settings);

      virtual void accept (Visitor &visitor) const; 

    private:
      madara::knowledge::KnowledgeRecord item_;
    };

  }
}

#endif // _MADARA_NO_KARL_

#endif /* _MADARA_LEAF_NODE_H_ */