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/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.contexts;

/**
 * An instance of this interface can be used by clients to receive notification
 * of changes to one or more instances of <code>IContext</code>.
 * <p>
 * This interface may be implemented by clients.
 * </p>
 * 
 * @since 3.0
 * @see org.eclipse.ui.contexts.IContext#addContextListener(IContextListener)
 * @see org.eclipse.ui.contexts.IContext#removeContextListener(IContextListener)
 * @deprecated Please use the "org.eclipse.core.commands" plug-in instead.
 * @see org.eclipse.core.commands.contexts.IContextListener
 */
public interface IContextListener {

    /**
     * Notifies that one or more properties of an instance of
     * <code>IContext</code> have changed. Specific details are described in
     * the <code>ContextEvent</code>.
     * 
     * @param contextEvent
     *            the context event. Guaranteed not to be <code>null</code>.
     */
    void contextChanged(ContextEvent contextEvent);
}
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