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/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package javax.faces.event;

import javax.faces.context.FacesContext;
import javax.faces.context.Flash;

/**
 *
 * This event must be published by a call
 * to {@link javax.faces.application.Application#publishEvent} when a value
 * is removed from the flash.
 *
 * @since 2.2
 */
public class PreRemoveFlashValueEvent extends SystemEvent {

    private static final long serialVersionUID = -82999687346960430L;
    
    // ------------------------------------------------------------ Constructors


    /**
     * Instantiate a new
     * PreRemoveFlashValueEvent that indicates the argument
     * key will be removed from the flash. If the argument is 
     * null, the literal {@link Flash#NULL_VALUE} must be passed
     * to the superclass constructor.

     * @param key the key in the flash that was just added.
     *
     */
    public PreRemoveFlashValueEvent(String key) {
        super(null == key ? Flash.NULL_VALUE : key);
    }
    
    /**
     * Instantiate a new
     * PreRemoveFlashValueEvent that indicates the argument
     * key will be removed from the flash. If the argument is 
     * null, the literal {@link Flash#NULL_VALUE} must be passed
     * to the superclass constructor.
     * 
     * @param facesContext the Faces context.
     * @param key the key in the flash that was just added.
     *
     */
    public PreRemoveFlashValueEvent(FacesContext facesContext, String key) {
        super(facesContext, key);
    }
    
    public String getKey() {
        return getSource().toString();
    }

}