FGPropertyReader.cpp

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 Module:       FGPropertyReader.cpp
 Author:       Bertrand Coconnier
 Date started: 12/30/13
 Purpose:      Read and manage properties from XML data
 
  ------------- Copyright (C) 2013 Bertrand Coconnier -------------
 
 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.
 
FUNCTIONAL DESCRIPTION
--------------------------------------------------------------------------------
This class reads and manages properties defined in XML data
 
HISTORY
--------------------------------------------------------------------------------
12/30/13   BC    Created
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#include "FGPropertyReader.h"
#include "FGPropertyManager.h"
#include "FGXMLElement.h"
#include "FGJSBBase.h"
 
using namespace std;
 
namespace JSBSim {
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
bool FGPropertyReader::ResetToIC(void)
{
  for (auto v: interface_prop_initial_value) {
    SGPropertyNode* node = v.first;
    if (!node->getAttribute(SGPropertyNode::PRESERVE))
      node->setDoubleValue(v.second);
  }
 
  return true;
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
void FGPropertyReader::Load(Element* el, FGPropertyManager* PM, bool override_props)
{
  Element *property_element = el->FindElement("property");
  if (property_element && FGJSBBase::debug_lvl > 0) {
    cout << endl << "    ";
    if (override_props)
      cout << "Overriding";
    else
      cout << "Declared";
    cout << " properties" << endl << endl;
  }
 
  while (property_element) {
    SGPropertyNode* node = nullptr;
    double value=0.0;
    bool has_value_attribute = !property_element->GetAttributeValue("value").empty();
 
    if (has_value_attribute)
      value = property_element->GetAttributeValueAsNumber("value");
 
    string interface_property_string = property_element->GetDataLine();
    if (PM->HasNode(interface_property_string)) {
      node = PM->GetNode(interface_property_string);
      if (override_props) {
 
        if (FGJSBBase::debug_lvl > 0) {
          if (interface_prop_initial_value.find(node) == interface_prop_initial_value.end()) {
            cout << property_element->ReadFrom()
                 << "  The following property will be overridden but it has not been" << endl
                 << "  defined in the current model '" << el->GetName() << "'" << endl;
          }
 
          cout << "      " << "Overriding value for property " << interface_property_string << endl
               << "       (old value: " << node->getDoubleValue() << "  new value: " << value << ")"
               << endl << endl;
        }
 
        node->setDoubleValue(value);
      }
      else {
        if (has_value_attribute) {
          cerr << property_element->ReadFrom()
              << "      Property " << interface_property_string
              << " is already defined." << endl
              << "      Its value (" << node->getDoubleValue() << ") will not"
              << " be overridden." << endl;
        }
        property_element = el->FindNextElement("property");
        continue;
      }
    } else {
      node = PM->GetNode(interface_property_string, true);
      if (node) {
        node->setDoubleValue(value);
 
        if (FGJSBBase::debug_lvl > 0)
          cout << "      " << interface_property_string << " (initial value: "
               << value << ")" << endl << endl;
      }
      else {
        cerr << "Could not create property " << interface_property_string
             << endl;
        property_element = el->FindNextElement("property");
        continue;
      }
    }
    interface_prop_initial_value[node] = value;
    if (property_element->GetAttributeValue("persistent") == string("true"))
      node->setAttribute(SGPropertyNode::PRESERVE, true);
 
    property_element = el->FindNextElement("property");
  }
 
  // End of interface property loading logic
}
}