Getting reasonable exception messages for com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException

ReasonableExceptionMessages.java

public static <T extends Object> T deserialize(Path xmlFile, Class<T> clazz) {
    try {
        JAXBContext context = JAXBContext.newInstance(clazz);
        Unmarshaller unmarshaller = context.createUnmarshaller();
        return (T) unmarshaller.unmarshal(xmlFile.toFile());
    } catch (Exception e) {
        String message = "Error while deserializing XML.";

        // Let's make some fancy magic to get understandable Exception messages!
        if (e instanceof IllegalAnnotationsException) {
            Field field;
            try {
                field = IllegalAnnotationsException.class.getDeclaredField("errors");
                field.setAccessible(true);
                Object value = field.get(e);
                if (value instanceof List) {
                    message += "\r\n" + Arrays.toString(((List)value).toArray());
                }
            } catch (Exception ex) {
                // Ignore
            }
        }
      
        Logging.error(message);
    }
}