FGPropertyValue.cpp

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
Module: FGPropertyValue.cpp
Author: Jon Berndt
Date started: 12/10/2004
Purpose: Stores property values
 
 ------------- Copyright (C) 2001  Jon S. Berndt (jon@jsbsim.org) -------------
 ------ Copyright (C) 2010 - 2011  Anders Gidenstam (anders(at)gidenstam.org) -
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU Lesser General Public License as published by the Free
 Software Foundation; either version 2 of the License, or (at your option) any
 later version.
 
 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 details.
 
 You should have received a copy of the GNU Lesser General Public License along
 with this program; if not, write to the Free Software Foundation, Inc., 59
 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 Further information about the GNU Lesser General Public License can also be
 found on the world wide web at http://www.gnu.org.
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#include <assert.h>
 
#include "FGPropertyValue.h"
 
namespace JSBSim {
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
FGPropertyValue::FGPropertyValue(const std::string& propName,
                                 FGPropertyManager* propertyManager)
  : PropertyManager(propertyManager), PropertyNode(nullptr),
    PropertyName(propName), Sign(1.0)
{
  if (PropertyName[0] == '-') {
    PropertyName.erase(0,1);
    Sign = -1.0;
  }
 
  if (PropertyManager->HasNode(PropertyName))
    PropertyNode = PropertyManager->GetNode(PropertyName);
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
FGPropertyNode* FGPropertyValue::GetNode(void) const
{
  if (!PropertyNode) {
    FGPropertyNode* node = PropertyManager->GetNode(PropertyName);
    
    if (!node)
      throw(std::string("FGPropertyValue::GetValue() The property " +
                        PropertyName + " does not exist."));
 
    PropertyNode = node;
  }
 
  return PropertyNode;
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
double FGPropertyValue::GetValue(void) const
{
  return GetNode()->getDoubleValue()*Sign;
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
void FGPropertyValue::SetValue(double value)
{
  // SetValue() ignores the Sign flag. So make sure it is never called with a
  // negative sign.
  assert(Sign == 1);
  GetNode()->setDoubleValue(value);
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
std::string FGPropertyValue::GetName(void) const
{
  if (PropertyNode)
    return PropertyNode->GetName();
  else
    return PropertyName;
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
std::string FGPropertyValue::GetNameWithSign(void) const
{
  string name;
 
  if (Sign < 0.0) name ="-";
 
  name += GetName();
 
  return name;
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
std::string FGPropertyValue::GetFullyQualifiedName(void) const
{
  if (PropertyNode)
    return PropertyNode->GetFullyQualifiedName();
  else
    return PropertyName;
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
std::string FGPropertyValue::GetPrintableName(void) const
{
  if (PropertyNode)
    return PropertyNode->GetPrintableName();
  else
    return PropertyName;
}
 
}