I am currently utilizing the Jackson library and attempting to accomplish a task as described here
BaseOperationRequest.java
@JsonTypeInfo(
use = JsonTypeInfo.Id.NAME,
include = JsonTypeInfo.As.PROPERTY,
property = "command"
)
@JsonSubTypes({
@JsonSubTypes.Type(name = "ZADD", value = ZAddBaseOperationRequest.class)
})
public class BaseOperationRequest {
public short operationId;
public Command command;
public String gameId;
public String key;
}
ZAddBaseOperationRequest.java
public class ZAddBaseOperationRequest extends BaseOperationRequest{
public Map<String, Double> members;
}
Command.java
public enum Command{
ZADD,
HSET
}
The issue arises when I attempt to pass an object from a REST call which resembles this structure:
@RestController
public class MyController{
// Currently set as GET, will be changed to POST with RequestBody in the future
@RequestMapping(value = "/process/{object}", method = RequestMethod.GET, produces = "application/json")
public @ResponseBody ResponseEntity process(@Pathvariable String object){
System.out.println(object);// The output here seems correct--->(A)
BaseOperationRequest[] baseOperationRequestArray = new ObjectMapper().readValue(object, BaseOperationRequest[].class);// Exception occurs here --->(B)
System.out.println(baseOperationRequestArray);
}
}
Now, when making the call like so:
1st scenario CALLING WITHOUT MEMBERS MAP:
<server>:<port>/.../process/[{"operationId":1,"command":"ZADD","gameId":"t5","key":"abc"}]
The process method is being invoked and although Jackson is instructed to create an instance of ZAddBaseOperationRequest when encountering ZADD as a command, the command itself appears assigned as null in the resulting object.
Please elaborate on why this might be happening? Where did the value of command disappear to?
2nd scenario CALLING WITH MEMBERS MAP: :/.../process/[{"members":{"a":1.0},"operationId":1,"command":"ZADD","gameId":"t5","key":"abc"}]
In this case, the result at (A) shows [{"members":{"a":1.0,b, indicating that some part of the GET request is missing.
This situation is quite frustrating :). Thanks for your assistance in advance.
Your help would be greatly appreciated!