/**
 * Returns the qualified package interface name for the given epackage (model).
 *
 * @param ePackage
 *          the model
 * @return the package interface name
 */
public static String getQualifiedPackageInterfaceName(final EPackage ePackage) {
  if (ePackage.getClass() == EPackageImpl.class) {
    // EPackage loaded from ecore model
    GenPackage genPackage = findGenPackage(ePackage);
    if (genPackage != null) {
      return genPackage.getQualifiedPackageInterfaceName();
    }
  } else {
    // EPackage loaded from Java
    Class<?>[] interfaces = ePackage.getClass().getInterfaces();
    if (interfaces != null && interfaces.length > 0) {
      return interfaces[0].getName();
    }
  }
  return null;
}
 

/**
 * Returns the qualified package interface name for the given epackage (model).
 *
 * @param ePackage
 *          the model
 * @return the package interface name
 */
public static String qualifiedPackageInterfaceName(final EPackage ePackage) {
  return ePackage.getClass() == EPackageImpl.class ? findGenPackage(ePackage).getQualifiedPackageInterfaceName()
      : ePackage.getClass().getInterfaces()[0].getName();
}