Method checkDuplicationContext

src/main/java/gate/Factory.java:801–810

Throws an exception if the specified duplication context is null or not active. This is to ensure that the Factory helper methods that take a DuplicationContext parameter can only be called in the context of a #duplicate(Resource) call. @param ctx the context to check. @throws NullPointerEx

(DuplicationContext ctx)

   *           active.
   */
  protected static void checkDuplicationContext(DuplicationContext ctx) {
    if(ctx == null) {
      throw new NullPointerException("No DuplicationContext provided");
    }
    if(!ctx.active) {
      throw new IllegalStateException(
              new Throwable().getStackTrace()[1].getMethodName()
                      + " helper method called outside an active duplicate call");
    }
  }

  /** Create a new FeatureMap. */
  public static FeatureMap newFeatureMap() {