CpEnvironmentProviderFactory.java

/*******************************************************************************
* Copyright (c) 2016 ARM Ltd. and others
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* ARM Ltd and ARM Germany GmbH - Initial API and implementation
*******************************************************************************/

package com.arm.cmsis.pack;

/**
 * Responsible for managing environment providers contributed through the extension point
 *
 * @noextend This class is not intended to be subclassed by clients.
 * @noinstantiate This class is not intended to be instantiated by clients.
 */
public class CpEnvironmentProviderFactory extends CpAbstractExtensionFactory<ICpEnvironmentProvider> {

	private static CpEnvironmentProviderFactory theFactory = null;
	public static final String ENVIRONMENT_PROVIDER = "EnvironmentProvider"; //$NON-NLS-1$

	/**
	 *  Private constructor to avoid subclassing
	 */
	private CpEnvironmentProviderFactory() {
		super(ENVIRONMENT_PROVIDER);
	}

	/**
	 * Singleton method that returns CpEnvironmentProviderFactory instance
	 * @return CpEnvironmentProviderFactory instance
	 */
	public static CpEnvironmentProviderFactory getInstance() {
		if(theFactory == null) {
			theFactory = new CpEnvironmentProviderFactory();
		}
		return theFactory;
	}

	/**
	 *  Destroys CpEnvironmentProviderFactory singleton
	 */
	public static void destroy() {
		theFactory = null;
	}


	@Override
	protected ICpEnvironmentProvider castToExtenderClass(Object extender) {
		if(extender instanceof ICpEnvironmentProvider)
			return (ICpEnvironmentProvider)extender;
		return null;
	}

}