@Override
    public void migrateEntity(Class originEntityClass, Class currentEntityClass)
        throws ViewDataMigrationException {
      if (currentEntityClass == null) {
        return;
      }
      migrationContext.copyAllObjects(originEntityClass, currentEntityClass);
    }
The data migrator implementation that copies all data without modification.
Used to copy data between instances of same version.
ambari-server/src/main/java/org/apache/ambari/server/view/ViewDataMigrationUtility.java