Copyright (c) 2008, 2015 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2008, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 ******************************************************************************/

package org.eclipse.core.commands;

Extend the IHandler interface to provide some context for isEnabled() requests. Clients should use AbstractHandler unless they need to provide their own listener mechanism. 
See Also:
AbstractHandler
Since:
3.4/**
 * Extend the IHandler interface to provide some context for isEnabled()
 * requests. Clients should use {@link AbstractHandler} unless they need to
 * provide their own listener mechanism.
 *
 * @since 3.4
 * @see AbstractHandler
 */
public interface IHandler2 extends IHandler {
	
Called by the framework to allow the handler to update its enabled state.
Params:
evaluationContext – 
           the state to evaluate against. May be null
           which indicates that the handler can query whatever model that
           is necessary. This context must not be cached./**
	 * Called by the framework to allow the handler to update its enabled state.
	 *
	 * @param evaluationContext
	 *            the state to evaluate against. May be <code>null</code>
	 *            which indicates that the handler can query whatever model that
	 *            is necessary. This context must not be cached.
	 */
	public void setEnabled(Object evaluationContext);
}