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package javax.faces.flow;

import javax.faces.context.FacesContext;
import javax.faces.FacesWrapper;

/**
 * <p
 * class="changed_added_2_2"><strong>FlowHandlerFactoryWrapper</strong>
 * provides a simple implementation of {@link FlowHandlerFactory} that
 * can be subclassed by developers wishing to provide specialized
 * behavior to an existing {@link FlowHandlerFactory} instance.  The
 * default implementation of all methods is to call through to the
 * wrapped {@link FlowHandlerFactory} instance.</p>
 *
 * <p class="changed_added_2_2>Usage: extend this class and override 
 * {@link #getWrapped} to
 * return the instance being wrapping.</p>
 *
 * @since 2.2
 */
public abstract class FlowHandlerFactoryWrapper extends FlowHandlerFactory implements FacesWrapper<FlowHandlerFactory> {

    public FlowHandlerFactoryWrapper() {
    }
    
    /**
     * <p class="changed_added_2_2">A class that implements this
     * interface uses this method to return an instance of the class
     * being wrapped.</p>
     *
     * @since 2.2
     */
    @Override
    public abstract FlowHandlerFactory getWrapped();

    @Override
    public FlowHandler createFlowHandler(FacesContext context) {
        return getWrapped().createFlowHandler(context);
    }
    
}
