/**
 * *******************************************************************************
 * Copyright (c) 2018-2019 Robert Bosch GmbH.
 * 
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 * 
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     Robert Bosch GmbH - initial API and implementation
 * *******************************************************************************
 */

package org.eclipse.app4mc.transformation.extensions.base.templates

import java.util.Properties
import org.eclipse.app4mc.transformation.extensions.ICustomObjectsStore
import org.slf4j.Logger

abstract class AbstractTransformer {


	/**
	 * Provides Log4J logger which can be used by the corresponding Transformer classes.
	 * Note: Root Logger is initialized during the startup and the corresponding Appenders are hooked to it accordingly.
	 * In case, if user specific appenders are to be attached to the logger, this method should be overridden and new Appenders should be attached to the logger 
	 * 
	 */
	protected def Logger getLogger(ICustomObjectsStore cust) {
		return cust.getInstance(Logger);

	}

	protected def String getProperty(String propKey, ICustomObjectsStore customObjsStore) {

		val Properties properties = customObjsStore.getInstance(Properties);

		val value = properties.get(propKey)

		if (value === null) {
			throw new NullPointerException("Request input key : \"" + propKey +
				"\" not supplied in the input properties file")
		}

		return value.toString

	}

}