Aspect that check outside web service

WebServiceAspect.java

@Aspect
public class WebServiceAspect {

	@Pointcut("execution(public * com.service..*Service.*(..))")
	void allService() {}

	@Around("allService()")
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public Object depressException(ProceedingJoinPoint joinPoint) throws Throwable {
		MethodSignature signature = (MethodSignature) joinPoint.getSignature();
		Class returnType = signature.getReturnType();

		try {
			return joinPoint.proceed();
		} catch (InternalServerErrorException e) {
			if (returnType.isAssignableFrom(Set.class)) {
				return new HashSet(0);
			}
			if (returnType.isAssignableFrom(List.class)) {
				return new ArrayList(0);
			}
			if (returnType.isAssignableFrom(Map.class)) {
				return new HashMap(0);
			}

			return null;
		}
	}

	@Before("allService()")
	public void printOutArguments(JoinPoint joinPoint) throws Throwable {
		if (log.isTraceEnabled()) {
			MethodSignature signature = (MethodSignature) joinPoint.getSignature();
			Object[] args = joinPoint.getArgs();
			ObjectWriter writer = new ObjectMapper().writerWithDefaultPrettyPrinter();
			StringBuffer sb = new StringBuffer();

			for (int i = 0; i < args.length; i++) {
				Object arg = args[i];
				try {
					String json = writer.writeValueAsString(arg);
					sb.append(String.format("arg[%d] = %s\n", i, json));
				} catch (Exception e) {
					log.error("%s", e.getMessage());
				}
			}
			log.trace("call {} with:[\n{}]", signature.getName(), sb);
		}
	}
}