spring data mongodb kortlægning dynamisk felt

Jeg fandt ud af en perfekt løsning. tag mit projekt for eksempel:

@Data
@Document(collection = "logs")
public class Log {
    @Id
    private String id;
    private Object data;

    // data field can be a string
    public void setData(String str) {
        data = str;
    }
    // data field can be a {}
    public void setData(JsonObject jsonObject) {
        data = new BasicDBObject(jsonObject.getMap());
    }
    // data can be a []
    public void setData(JsonArray jsonArray) {
        BasicDBList list = new BasicDBList();
        list.addAll(jsonArray.getList());
        data = list;
    }
}

erklære data felt som type Object , implementer 3 slags sættere til det.

Her er testcasen:

@RunWith(SpringRunner.class)
@SpringBootTest
public class LogRepositoryTest {

    @Autowired
    private LogRepository logRepository;

    @Test
    public void test() {
        Log strLog = new Log();
        strLog.setData("string here");
        logRepository.save(strLog);
        Log objLog = new Log();
        objLog.setData(new JsonObject().put("key", "value").put("obj", new JsonObject()));
        logRepository.save(objLog);
        Log aryLog = new Log();
        aryLog.setData(new JsonArray().add("a").add("b").add("c"));
        logRepository.save(aryLog);
    }
}

Og resultatet:

{
        "_id" : ObjectId("5a09fa46a15b065268a0a157"),
        "_class" : "ltd.linkcon.spider.domain.Log",
        "data" : "string here"
}
{
        "_id" : ObjectId("5a09fa46a15b065268a0a158"),
        "_class" : "ltd.linkcon.spider.domain.Log",
        "data" : {
                "key" : "value",
                "obj" : [ ]
        }
}
{
        "_id" : ObjectId("5a09fa46a15b065268a0a159"),
        "_class" : "ltd.linkcon.spider.domain.Log",
        "data" : [
                "a",
                "b",
                "c"
        ]
}