AnnotationInvocationHandler.java 文件源码

public Object invoke(Object proxy, Method method, Object[] args)
  throws Throwable
{
    String methodName = method.getName().intern();
    if (args == null || args.length == 0)
    {
        if (methodName == "toString")
        {
            return toString(type, memberValues);
        }
        else if (methodName == "hashCode")
        {
            return Integer.valueOf(hashCode(type, memberValues));
        }
        else if (methodName == "annotationType")
        {
            return type;
        }
        else
        {
            Object val = memberValues.get(methodName);
            if (val == null)
            {
                throw new IncompleteAnnotationException(type, methodName);
            }
            if (! getBoxedReturnType(method).isInstance(val))
            {
                throw new AnnotationTypeMismatchException(method,
                    val.getClass().getName());
            }
            if (val.getClass().isArray())
            {
                val = arrayClone(val);
            }
            return val;
        }
    }
    else if (args.length == 1)
    {
        if (methodName == "equals")
        {
            return Boolean.valueOf(equals(type, memberValues, args[0]));
        }
    }
    throw new InternalError("Invalid annotation proxy");
}