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package org.tickcode.broadcast;

import java.lang.reflect.InvocationHandler;

/**
 * Provides static methods used primarily by the aspect BroadcastImpl.aj
 * @author Eyon Land
 *
 */
public abstract class AbstractMessageBroker implements MessageBroker{
	private static boolean isUsingAspectJ = false;
	
	/**
	 * Used by aspects so they know whether they can be involved with building the desired mix-ins.
	 * @return
	 */
	public static boolean isUsingAspectJ() {
		return isUsingAspectJ;
	}

	/**
	 * Can be called explicitly to avoid using aspects.  
	 * Normally this would only be used in testing new ideas where AspectJ
	 * is substituted for javassist or asm/cglib technology.
	 * @param usingAspectJ
	 */
	public static void setUsingAspectJ(boolean usingAspectJ) {
		isUsingAspectJ = usingAspectJ;
	}
	
	/**
	 * For a java.lang.reflect.Proxy, if the InvocationHandler happens to implement GetProxyImplementation
	 * then this provides a way to get the underlying implementation.  This would be used for example
	 * if the {@link BroadcastProxy} were being used to provide the broadcast behavior to the implementation.
	 * @param broadcast
	 * @return
	 */
	public static Broadcast getBroadcastImplementation(Broadcast broadcast){
		if(broadcast instanceof java.lang.reflect.Proxy){
			InvocationHandler handler = ((java.lang.reflect.Proxy)broadcast).getInvocationHandler(broadcast);
			if(handler instanceof GetProxyImplementation){
				return ((GetProxyImplementation)handler).getBroadcastImplementation();
			}
		}
		return broadcast;
	}


}