CompositeAddNode.cpp

Go to the documentation of this file.

/* -*- C++ -*- */

#ifndef _ADD_NODE_CPP_
#define _ADD_NODE_CPP_

#ifndef _MADARA_NO_KARL_

#include <iostream>


#include "madara/expression/ComponentNode.h"
#include "madara/expression/Visitor.h"
#include "madara/expression/CompositeAddNode.h"
#include "madara/expression/LeafNode.h"

// Ctor

madara::expression::CompositeAddNode::CompositeAddNode (
  logger::Logger & logger, const ComponentNodes & nodes)
: madara::expression::CompositeTernaryNode (logger, nodes)
{
}

madara::knowledge::KnowledgeRecord
madara::expression::CompositeAddNode::item (void) const
{
  return madara::knowledge::KnowledgeRecord("+");
}

madara::knowledge::KnowledgeRecord
madara::expression::CompositeAddNode::prune (bool & can_change)
{
  madara::knowledge::KnowledgeRecord return_value;

  int j = 0;
  for (ComponentNodes::iterator i = nodes_.begin ();
       i != nodes_.end (); ++i, ++j)
  {
    bool value_changes = false;
    madara::knowledge::KnowledgeRecord value;
    value = (*i)->prune (value_changes);
    if (!value_changes && dynamic_cast <LeafNode *> (*i) == 0)
    {
      delete *i;
      *i = new LeafNode (*this->logger_, value);
    }

    if (j == 0)
      return_value = value;
    else
      return_value += value;

    can_change = can_change || value_changes;
  }

  return return_value;
}


madara::knowledge::KnowledgeRecord 
madara::expression::CompositeAddNode::evaluate (
  const madara::knowledge::KnowledgeUpdateSettings & settings)
{
  madara::knowledge::KnowledgeRecord return_value;

  int j = 0;
  for (ComponentNodes::iterator i = nodes_.begin ();
       i != nodes_.end (); ++i, ++j)
  {
    madara::knowledge::KnowledgeRecord value = (*i)->evaluate (settings);
    
    if (j == 0)
      return_value = value;
    else
      return_value += value;
  }

  return return_value;
}


// accept a visitor
void 
madara::expression::CompositeAddNode::accept (Visitor &visitor) const
{
  visitor.visit (*this);
}

#endif // _MADARA_NO_KARL_

#endif /* _ADD_NODE_CPP_ */