TemporalTimestampListener.java 文件源码

private void setTimestamps(Field[] fields, Object entity) throws Exception {
    Calendar cal = null;
    for (Field field : fields) {
        Class<?> type = field.getType();
        Temporal temporalAnnotation = field.getAnnotation(Temporal.class);

        if (temporalAnnotation != null) {
            if (field.isAnnotationPresent(Column.class)) {
                field.setAccessible(true);
                try {
                    if (TemporalType.TIMESTAMP.equals(temporalAnnotation.value()) && (field.isAnnotationPresent(AutoPopulate.class))) {
                        if (field.get(entity) == null || field.getAnnotation(AutoPopulate.class).autoUpdateValue()) {
                            if (type.isAssignableFrom(Date.class)) {
                                if (cal == null) {
                                    cal = SystemTime.asCalendar();
                                }
                                field.set(entity, cal.getTime());
                            } else if (type.isAssignableFrom(Calendar.class)) {
                                if (cal == null) {
                                    cal = SystemTime.asCalendar();
                                }
                                field.set(entity, cal);
                            }
                        }
                    }
                } finally {
                    field.setAccessible(false);
                }
            }
        } else if (field.isAnnotationPresent(Embedded.class)) {
            field.setAccessible(true);
            try {
                // Call recursively
                setTimestamps(field.getType().getDeclaredFields(), field.get(entity));
            } finally {
                field.setAccessible(false);
            }
        }
    }
}