ListNode.cpp

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#ifndef _MADARA_NO_KARL_

#include "madara/expression/Visitor.h"
#include "madara/expression/ListNode.h"
#include "madara/utility/Utility.h"


#include <string>
#include <sstream>

madara::expression::ListNode::ListNode (
  madara::knowledge::ThreadSafeContext & context)
: ComponentNode (context.get_logger ()), list_ ()
{

}

madara::expression::ListNode::~ListNode ()
{
  // do not clean up record_. Let the context clean that up.
}


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

madara::knowledge::KnowledgeRecord
madara::expression::ListNode::item () const
{
  return madara::knowledge::KnowledgeRecord (
    madara::knowledge::KnowledgeRecord::Integer (list_.size ()));
}

madara::knowledge::KnowledgeRecord
madara::expression::ListNode::prune (bool & can_change)
{
  // a variable is one of very few nodes that can change over time and
  // cannot be pruned
  can_change = true;
  
  return madara::knowledge::KnowledgeRecord (
    madara::knowledge::KnowledgeRecord::Integer (list_.size ()));
}

madara::knowledge::KnowledgeRecord 
madara::expression::ListNode::evaluate (
  const madara::knowledge::KnowledgeUpdateSettings & /*settings*/)
{
  return madara::knowledge::KnowledgeRecord (
    madara::knowledge::KnowledgeRecord::Integer (list_.size ()));
}


#endif // _MADARA_NO_KARL_