nextapp.echo.filetransfer.receiver.UploadProcessorFactory Maven / Gradle / Ivy
/*
* This file is part of the Echo File Transfer Library.
* Copyright (C) 2002-2009 NextApp, Inc.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*/
package nextapp.echo.filetransfer.receiver;
/**
* Factory for retrieving the UploadProcessor implementation.
*
* Custom UploadProcessor implementations may be configured by calling
* {@link #setUploadProcessor(UploadProcessor)} from within an application entry point.
*/
public class UploadProcessorFactory {
private static UploadProcessor instance;
/**
* Gets the singleton UploadProcesor. If it has not been set, a
* default implementation is created.
*
* @return the UploadProcessor.
*/
public synchronized static UploadProcessor getUploadProcessor() {
if (instance == null) {
instance = new JakartaUploadProcessor();
}
return instance;
}
/**
* Sets the upload processor to be used.
*
* @param uploadProcessor the upload processor
* @throws IllegalStateException if the upload provider has already been set
*/
public synchronized static void setUploadProcessor(UploadProcessor uploadProcessor) {
if (instance != null) {
throw new IllegalStateException("UploadProcessor already configured");
}
instance = uploadProcessor;
}
}