private Query<JobPo> addCondition(Query<JobPo> query, String field, Object o) {
        if (!checkCondition(o)) {
            return query;
        }
        query.field(field).equal(o);
        return query;
    }
@author Robert HG (254963746@qq.com) on 6/7/15.
lts-core/src/main/java/com/github/ltsopensource/queue/mongo/AbstractMongoJobQueue.java