ACE/ace/Monitor_Control/Constraint_Interpreter.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file   Constraint_Interpreter.h
   6  *
   7  *  @author Jeff Parsons <j.parsons@vanderbilt.edu>
   8  */
   9 //=============================================================================
  10
  11 #ifndef CONSTRAINT_INTERPRETER_H
  12 #define CONSTRAINT_INTERPRETER_H
  13
  14 #include /**/ "ace/pre.h"
  15
  16 #include "ace/CDR_Base.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 # pragma once
  20 #endif /* ACE_LACKS_PRAGMA_ONCE */
  21
  22 #if defined (ACE_HAS_MONITOR_FRAMEWORK) && (ACE_HAS_MONITOR_FRAMEWORK == 1)
  23
  24 #include "ace/ETCL/ETCL_Interpreter.h"
  25
  26 #include "ace/Monitor_Control/Monitor_Control_export.h"
  27
  28 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  29
  30 namespace ACE
  31 {
  32   namespace Monitor_Control
  33   {
  34     class Constraint_Visitor;
  35
  36     /**
  37      * @class Constraint_Interpreter
  38      *
  39      * @brief "ETCL" Interpreter for MonitorControl constraints,
  40               specialized to encapsulate MonitorControl-specific
  41               knowledge of types and visitors.
  42      */
  43     class MONITOR_CONTROL_Export Constraint_Interpreter
  44       : public ETCL_Interpreter
  45     {
  46     public:
  47       Constraint_Interpreter ();
  48
  49       virtual ~Constraint_Interpreter ();
  50
  51       /**
  52        * This method builds an expression tree representing the
  53        * constraint specified in <constraints>, and returns -1 with
  54        * an error message if the constraint given has syntax errors or
  55        * semantic errors, such as mismatched types.
  56        */
  57       int build_tree (const char* constraints);
  58
  59       /// Returns true if the constraint is evaluated successfully by
  60       /// the evaluator.
  61       ACE_CDR::Boolean evaluate (Constraint_Visitor &evaluator);
  62     };
  63   }
  64 }
  65
  66 ACE_END_VERSIONED_NAMESPACE_DECL
  67
  68 #endif /* ACE_HAS_MONITOR_FRAMEWORK==1 */
  69
  70 #include /**/ "ace/post.h"
  71
  72 #endif /* CONSTRAINT_INTERPRETER_H */