ModelHierarchyVisitor

The com.nomagic.uml2.impl.ModelHierarchyVisitor is an enhanced implementation of the Visitor pattern and a subclass of com.nomagic.uml2.impl.ModelVisitor, used for visiting model elements. 

Every visit<element_metatype> method calls a visit<element_metatype> method for a super type.

Model elements visit… methods have an additional context parameter of the com.nomagic.uml2.ext.jmi.reflect.VisitorContext type. The visitor context is used to track what super type visit<element_metatype> methods were already visited (to avoid multiple visits because some model elements have a multiple inheritance). Open API users should not work with the visitor context. All tracking is done in internal implementation.

For example, you can put some code into com.nomagic.uml2.impl.ModelHierarchyVisitor.visitClassifier(Classifier) and it will be executed for all subclasses of a com.nomagic.uml2.ext.magicdraw.classes.mdkernel.Classifier. 

    ModelVisitor myVisitor = new ModelHierarchyVisitor()
    {
        public void visitClassifier(Classifier element, VisitorContext context)
        {
          	//this is my classifier
        }
    };
    Project project = ...;
    Package root = project.getPrimaryModel(); 
    Iterator<Element> it = root.getOwnedElement().iterator();
    while (it.hasNext())
    {
        it.next().accept(myVisitor);
    }