Property framework

System to access object properties.

System to access object properties.

Introduction

The property framework introduces the ability to access attributes (member variables) of a class by name without knowing the class type. It's like the reflection mechanism of Java or C#. This ability is introduced by the App::PropertyContainer class and can be used by all derived classes.

This makes it possible in the first place to make an automatic mapping to python (e.g. in App::FeaturePy) and abstract editing properties in Gui::PropertyEditor.

Examples

Here some little examples how to use it:

// search in PropertyList
Property *prop = _pcFeature->getPropertyByName(attr);
if(prop)
{
  return prop->getPyObject();
}

or:

void PropertyContainer::Restore(Base::Reader &reader)
{
  reader.readElement("Properties");
  int Cnt = reader.getAttributeAsInteger("Count");
 
  for(int i=0 ;i<Cnt ;i++)
  {
    reader.readElement("Property");
    string PropName = reader.getAttribute("name");
    Property* prop = getPropertyByName(PropName.c_str());
    if(prop)
      prop->Restore(reader);
 
    reader.readEndElement("Property");
  }
  reader.readEndElement("Properties");
}