public interface AdvisorAdapter {

    boolean supportsAdvice(Advice advice);

    MethodInterceptor getInterceptor(Advisor advisor);

}

class MethodBeforeAdviceAdapter implements AdvisorAdapter, Serializable {

    @Override

    public boolean supportsAdvice(Advice advice) {

        return (advice instanceof MethodBeforeAdvice);

    }

    @Override

    public MethodInterceptor getInterceptor(Advisor advisor) {

        MethodBeforeAdvice advice = (MethodBeforeAdvice) advisor.getAdvice();

        return new MethodBeforeAdviceInterceptor(advice);

    }

}

public class MethodBeforeAdviceInterceptor implements MethodInterceptor, Serializable {

    private MethodBeforeAdvice advice;

    /**

     * Create a new MethodBeforeAdviceInterceptor for the given advice.

     * @param advice the MethodBeforeAdvice to wrap

     */

    public MethodBeforeAdviceInterceptor(MethodBeforeAdvice advice) {

        Assert.notNull(advice, "Advice must not be null");

        this.advice = advice;

    }

    @Override

    public Object invoke(MethodInvocation mi) throws Throwable {

        this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis() );

        return mi.proceed();

    }

}