CompositeFunctionNode.h

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

#ifndef _MADARA_NO_KARL_

#include <vector>
#include "madara/knowledge/KnowledgeRecord.h"
#include "madara/expression/CompositeTernaryNode.h"
#include "madara/knowledge/Functions.h"
#include "madara/knowledge/ThreadSafeContext.h"

namespace madara
{
  namespace expression
  {
    class ComponentNode;
    class Visitor;

    class CompositeFunctionNode : public CompositeTernaryNode
    {
    public:
      CompositeFunctionNode (const std::string & name, 
        madara::knowledge::ThreadSafeContext & context,
        const ComponentNodes & nodes);

      virtual ~CompositeFunctionNode (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:

      // function name
      const std::string name_;

      // variables context
      knowledge::ThreadSafeContext & context_;

      // function pointer
      knowledge::Function * function_;
      
      // pointers to .1, .2, .3, etc.
      std::vector <knowledge::KnowledgeRecord *> compiled_args_;
    };
  }
}

#endif // _MADARA_NO_KARL_

#endif /* _MADARA_COMPOSITE_FUNCTION_NODE_H_ */