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With inspiration from other libraries

There is a newer version: 2.12.15

/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.spi;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.core.Context;
import ch.qos.logback.core.spi.ContextAwareBase;

public class LoggerContextAwareBase extends ContextAwareBase implements LoggerContextAware {

    /**
     * Set the owning context. The owning context cannot be set more than
     * once.
     */
    public void setLoggerContext(LoggerContext context) {
        super.setContext(context);
    }

    public void setContext(Context context) {
        // check that the context is of type LoggerContext. Otherwise, throw an exception
        // Context == null is a degenerate case but nonetheless permitted.
        if (context instanceof LoggerContext || context == null) {
            super.setContext(context);
        } else {
            throw new IllegalArgumentException("LoggerContextAwareBase only accepts contexts of type c.l.classic.LoggerContext");
        }
    }

    /**
     * Return the {@link LoggerContext} this component is attached to.
     * 
     * @return The owning LoggerContext
     */
    public LoggerContext getLoggerContext() {
        return (LoggerContext) context;
    }

}