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The public API classes of the Apache MyFaces CORE JSF-2.2 project

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package jakarta.faces.event;

import java.util.EventObject;
import jakarta.faces.context.FacesContext;

/**
 * @since 2.0
 */
public abstract class SystemEvent extends EventObject
{
    private transient FacesContext facesContext;
    
    public SystemEvent(Object source)
    {
        super(source);
    }
    
    public SystemEvent(FacesContext facesContext, Object source)
    {
        super(source);
        this.facesContext = facesContext;
    }

    public boolean isAppropriateListener(FacesListener listener)
    {
        return listener instanceof SystemEventListener;
    }

    public void processListener(FacesListener listener)
    {
        ((SystemEventListener) listener).processEvent(this);
    }
    
    /**
     * @since 2.3
     */
    public FacesContext getFacesContext()
    {
        if (facesContext == null)
        {
            facesContext = FacesContext.getCurrentInstance();
        }
        return facesContext;
    }
}