@Override
    public void validateObject(ProjectPath path, Validator validator) {
        // check for empty name
        DataDomain domain = (DataDomain) path.getObject();
        String name = domain.getName();
        if (Util.isEmptyString(name)) {
            validator.registerError("Unnamed DataDomain.", path);
            // no more name assertions
            return;
        }
        Project project = (Project) path.getObjectParent();
        if (project == null) {
            return;
        }
        // check for duplicate names in the parent context
        Iterator it = project.getChildren().iterator();
        while (it.hasNext()) {
            DataDomain dom = (DataDomain) it.next();
            if (dom == domain) {
                continue;
            }
            if (name.equals(dom.getName())) {
                validator.registerError("Duplicate DataDomain name: " + name + ".", path);
                return;
            }
        }
    }