MADARA  3.1.8
CompositeAndNode.cpp
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1 /* -*- C++ -*- */
2 
3 #ifndef COMPOSITE_AND_NODE_CPP
4 #define COMPOSITE_AND_NODE_CPP
5 
6 #ifndef _MADARA_NO_KARL_
7 
8 #include <iostream>
9 
14 
15 
16 // Ctor
17 
19  logger::Logger & logger, const ComponentNodes & nodes)
20 : madara::expression::CompositeTernaryNode (logger, nodes)
21 {
22 }
23 
26 {
27  return knowledge::KnowledgeRecord("&&");
28 }
29 
30 
36 {
38 
39  int j = 0;
40  for (ComponentNodes::iterator i = nodes_.begin ();
41  i != nodes_.end (); ++i, ++j)
42  {
43  bool value_changes = false;
45  value = (*i)->prune (value_changes);
46  if (!value_changes && dynamic_cast <LeafNode *> (*i) == 0)
47  {
48  delete *i;
49  *i = new LeafNode (*this->logger_, value);
50  }
51 
52  if (j == 0)
53  return_value = value;
54  else
55  return_value = knowledge::KnowledgeRecord (
56  value && return_value);
57 
58  can_change = can_change || value_changes;
59  }
60 
61  return return_value;
62 }
63 
69 {
70  int j = 0;
71  for (ComponentNodes::iterator i = nodes_.begin ();
72  i != nodes_.end (); ++i, ++j)
73  {
74  // if we have a zero eval, return 0 immediately
75  if ((*i)->evaluate (settings).is_false ())
77  }
78 
79  // if everything was true, return true
81 }
82 
83 
84 // accept a visitor
85 void
87 {
88  visitor.visit (*this);
89 }
90 
91 #endif // _MADARA_NO_KARL_
92 
93 #endif /* COMPOSITE_AND_NODE_CPP */
This class encapsulates an entry in a KnowledgeBase.
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
virtual madara::knowledge::KnowledgeRecord prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.
madara::knowledge::KnowledgeRecord KnowledgeRecord
CompositeAndNode(logger::Logger &logger, const ComponentNodes &nodes)
Constructor.
std::deque< ComponentNode * > ComponentNodes
a vector of Component Nodes
logger::Logger * logger_
handle the context
Definition: ComponentNode.h:96
Defines a node that contains a madara::knowledge::KnowledgeRecord::Integer value. ...
Definition: LeafNode.h:23
Provides knowledge logging services to files and terminals.
Definition: GlobalLogger.h:11
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the printable character of the node.
A multi-threaded logger for logging to one or more destinations.
Definition: Logger.h:88
Abstract base class for all visitors to all classes that derive from ComponentNode.
Definition: Visitor.h:90
Settings for applying knowledge updates.
virtual void visit(const LeafNode &node)=0
Visit a LeafNode.
Copyright (c) 2015 Carnegie Mellon University.
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the expression tree.