/**
* @param id
* @param createDate
* @param modifyDate
*/
protected BaseEntity(
DbOptional<Long> id, DbOptional<Long> createDate, DbOptional<Long> modifyDate) {
long currTime = System.currentTimeMillis();
mId = id;
mCreateDate = createDate.isPresent() ? createDate : DbOptional.<Long>of(currTime);
mModifyDate = modifyDate.isPresent() ? modifyDate : DbOptional.<Long>of(currTime);
}
