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JSR-000344: JavaServer(TM) Faces 2.2 API
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package javax.faces.event;

import javax.faces.component.UIComponent;
import javax.faces.component.behavior.Behavior;

/**
 * BehaviorEvent is
 * the event that can be generated from component 
 * {@link javax.faces.component.behavior.Behavior}.
 * 
 *
 * @since 2.0
 */
public abstract class BehaviorEvent extends FacesEvent {

    private final Behavior behavior;

    /**
     * Construct a new event object 
     * from the specified source component and behavior.
     *
     * @param component Source {@link UIComponent} for this event
     * @param behavior {@link Behavior} that sent this event
     *
     * @throws IllegalArgumentException if component or 
     * behavior is null
     *
     * @since 2.0
     */
    public BehaviorEvent(UIComponent component, Behavior behavior) {
        super(component);

        if (null == behavior) {
            throw new IllegalArgumentException("Behavior agrument cannot be null");
        }
        
        this.behavior = behavior;
    }

    /**
     * Return the source {@link Behavior} 
     * that sent this event.
     *
     * @since 2.0
     */
    public Behavior getBehavior() {
        return behavior;
    }
}