/*******************************************************************************
* Copyright (c) 2008, 2015 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.core.commands;
/**
* 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.
*
* @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);
}