MADARA  3.1.8
SystemCallLogLevel.cpp
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1 
2 #ifndef _MADARA_NO_KARL_
3 
4 
8 
9 
12  const ComponentNodes & nodes)
13  : SystemCallNode (context, nodes)
14 {
15 
16 }
17 
18 // Dtor
20 {
21 }
22 
25 {
27 }
28 
34 {
35  // user can always change a function, and we have no control over
36  // what it does. Consequently, a function node cannot be pruned out
37  // under any situation
38  can_change = true;
39 
41 
42  if (nodes_.size () > 0)
43  {
44  bool arg_can_change = false;
45  result = nodes_[0]->prune (arg_can_change);
46 
47  if (!arg_can_change && dynamic_cast <LeafNode *> (nodes_[0]) == 0)
48  {
49  delete nodes_[0];
50  nodes_[0] = new LeafNode (*(this->logger_), result);
51  }
52  }
53 
54  if (nodes_.size () > 1)
55  {
57  "KARL COMPILE ERROR: System call log_level requires 0 or 1 arguments,"
58  " e.g., log_level (10) or log_level ()--which returns the log level\n");
59  }
60 
61  return result;
62 }
63 
69 {
70  knowledge::KnowledgeRecord return_value;
71 
72  if (nodes_.size () == 1)
73  {
75  "System call log_level is setting log level\n");
76 
77  int level = (int)nodes_[0]->evaluate (settings).to_integer ();
78 
79  logger_->set_level (level);
80 
82  "System call log_level has set log level to %d\n",
83  level);
84 
85  return knowledge::KnowledgeRecord (level);
86  }
87  else if (nodes_.size () == 0)
88  {
90  "System call log_level is returning log level.\n");
91 
93  }
94  else if (nodes_.size () > 1)
95  {
97  "KARL RUNTIME ERROR: System call log_level requires 0 or 1 arguments,"
98  " e.g., log_level (10) or log_level ()--which returns the log level\n");
99  }
100 
101  return return_value;
102 }
103 
104 // accept a visitor
105 void
107  madara::expression::Visitor &visitor) const
108 {
109  visitor.visit (*this);
110 }
111 
112 #endif // _MADARA_NO_KARL_
This class encapsulates an entry in a KnowledgeBase.
SystemCallLogLevel(madara::knowledge::ThreadSafeContext &context, const ComponentNodes &nodes)
Constructor.
virtual void accept(Visitor &visitor) const
Accepts a visitor subclassed from the Visitor class.
virtual madara::knowledge::KnowledgeRecord item(void) const
Returns the value of the node.
madara::knowledge::KnowledgeRecord KnowledgeRecord
std::deque< ComponentNode * > ComponentNodes
a vector of Component Nodes
virtual madara::knowledge::KnowledgeRecord evaluate(const madara::knowledge::KnowledgeUpdateSettings &settings)
Evaluates the expression tree.
logger::Logger * logger_
handle the context
Definition: ComponentNode.h:96
void set_level(int level)
Sets the maximum logging detail level.
Definition: Logger.inl:44
This class stores variables and their values for use by any entity needing state information in a thr...
virtual ~SystemCallLogLevel(void)
Destructor.
Defines a node that contains a madara::knowledge::KnowledgeRecord::Integer value. ...
Definition: LeafNode.h:23
int get_level(void)
Gets the maximum logging detail level.
Definition: Logger.inl:68
#define madara_logger_ptr_log(logger, level,...)
Fast version of the madara::logger::log method for Logger pointers.
Definition: Logger.h:32
Abstract base class for all visitors to all classes that derive from ComponentNode.
Definition: Visitor.h:90
Integer to_integer(void) const
converts the value to an integer
Interface for a MADARA system call.
Settings for applying knowledge updates.
virtual void visit(const LeafNode &node)=0
Visit a LeafNode.
virtual madara::knowledge::KnowledgeRecord prune(bool &can_change)
Prunes the expression tree of unnecessary nodes.