Visitors

Visitor design pattern is implemented in UML model structure. Every com.nomagic.uml2.ext.magicdraw.classes.mdkernel.Element has the accept(AbstractVisitor) method for visiting it. 

The com.nomagic.uml2.impl.ModelVisitor has the visit<element_metatype> method for all types of model elements. This is very useful when you are working with a large collection of elements and need to perform actions, specific for every type of Element (for example, save/load, copy/paste, or a specific properties setting).

Just derive your class from com.nomagic.magicdraw.uml.InheritanceVisitor and override some visit... methods and call accept(AbstractVisitor) for Elements.

    ModelVisitor myVisitor = new ModelVisitor()
    {
        // override some visit methods ...
        public void visitClass(Class element, VisitorContext context)
        {
        	//this is my UML Class 
        }
    };
    Project project = ...;
    Package root = project.getPrimaryModel(); 
    Iterator<Element> it = root.getOwnedElement().iterator();
    while (it.hasNext())
    {
        it.next().accept(myVisitor);
    }