src/FDM/JSBSim/math/FGPropertyValue.cpp

   1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2
   3 Module: FGPropertyValue.cpp
   4 Author: Jon Berndt
   5 Date started: 12/10/2004
   6 Purpose: Stores property values
   7
   8  ------------- Copyright (C) 2001  Jon S. Berndt (jon@jsbsim.org) -------------
   9  ------ Copyright (C) 2010 - 2011  Anders Gidenstam (anders(at)gidenstam.org) -
  10
  11  This program is free software; you can redistribute it and/or modify it under
  12  the terms of the GNU Lesser General Public License as published by the Free Software
  13  Foundation; either version 2 of the License, or (at your option) any later
  14  version.
  15
  16  This program is distributed in the hope that it will be useful, but WITHOUT
  17  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  18  FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  19  details.
  20
  21  You should have received a copy of the GNU Lesser General Public License along with
  22  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  23  Place - Suite 330, Boston, MA  02111-1307, USA.
  24
  25  Further information about the GNU Lesser General Public License can also be found on
  26  the world wide web at http://www.gnu.org.
  27
  28 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  29 INCLUDES
  30 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  31
  32 #include "FGPropertyValue.h"
  33
  34 namespace JSBSim {
  35
  36 static const char *IdSrc = "$Id: FGPropertyValue.cpp,v 1.7 2011/04/05 20:20:21 andgi Exp $";
  37 static const char *IdHdr = ID_PROPERTYVALUE;
  38
  39 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  40 CLASS IMPLEMENTATION
  41 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
  42
  43 FGPropertyValue::FGPropertyValue(FGPropertyManager* propNode)
  44   : PropertyManager(0L), PropertyNode(propNode)
  45 {
  46 }
  47
  48 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  49
  50 FGPropertyValue::FGPropertyValue(std::string propName, FGPropertyManager* propertyManager)
  51   : PropertyManager(propertyManager), PropertyNode(0L), PropertyName(propName)
  52 {
  53 }
  54
  55 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  56
  57 double FGPropertyValue::GetValue(void) const
  58 {
  59   FGPropertyManager* node = PropertyNode;
  60
  61   if (!PropertyNode) {
  62     // The node cannot be cached since this is a const method.
  63     node = PropertyManager->GetNode(PropertyName);
  64
  65     if (!node) {
  66       throw(std::string("FGPropertyValue::GetValue() The property " +
  67                         PropertyName + " does not exist."));
  68     }
  69   }
  70
  71   return node->getDoubleValue();
  72 }
  73
  74 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  75
  76 std::string FGPropertyValue::GetName(void) const
  77 {
  78   if (PropertyNode) {
  79     return PropertyNode->GetName();
  80   } else {
  81     return PropertyName;
  82   }
  83 }
  84
  85 }