How to send a string with quotemarks in the RequestBody?

Question

I have the following API-method:

@PatchMapping("/{id}")
  public ResponseEntity<?> partialProjectUpdate(@PathVariable long id, @RequestBody EntryStatus status) throws DailyEntryNotFoundException {
    return dailyEntryService.partialDailyEntryUpdate(id, status);
  }

EntryStatus is an enum:

public enum EntryStatus {
  OPEN,
  PROGRESS,
  CHECKED,
  BOOKED,
  UNAVAILABLE;

  private static Map<String, EntryStatus> namesMap = new HashMap<String, EntryStatus>(3);

  static {
    namesMap.put("OPEN", OPEN);
    namesMap.put("PROGRESS", PROGRESS);
    namesMap.put("CHECKED", CHECKED);
    namesMap.put("BOOKED", BOOKED);
    namesMap.put("UNAVAILABLE", UNAVAILABLE);
  }

  @JsonCreator
  public static EntryStatus forValue(String value) {
    return namesMap.get(value);
  }

  @JsonValue
  public String toValue() {
    for (Map.Entry<String, EntryStatus> entry : namesMap.entrySet()) {
      if (entry.getValue() == this)
        return entry.getKey();
    }

    return null; // or fail
  }
}

I call the method in typescript like this:

partialUpdateDailyEntry(dailyEntry: DailyEntry, status): Observable<any> {
    const statusName: string = status.name;
    return this.http.patch(BASE_URL + dailyEntry.id, statusName, this.authService.setHeaders('application/json'))
      .pipe(
        catchError(this.handleService.error)
      );
  }

statusName is a string, but the problem is that its getting sent without quotemarks via JSON. The RequestBody is for example OPEN instead of "OPEN" which gives me the following error:

JSON parse error: Unrecognized token 'OPEN': was expecting ('true', 'false' or 'null').

As stated thats caused by the fact that the string is sent without quotemarks.

I could fix that problem by adding the quotemarks manually to statusName like this:

const statusName: string = '"' + status.name + '"';

But that cant be the proper solution, is there a better way to do it?

Answer 1

Try with

@JsonFormat(shape = JsonFormat.Shape.STRING)
public enum EntryStatus{
    OPEN,
    PROGRESS,
    CHECKED,
    BOOKED,
    UNAVAILABLE;
}

Answer 2

You are adding the header that you are sending JSON , but "OPEN" is not a valid JSON value.

You should either change your headers:

this.authService.setHeaders('text/plain')

Or change how you send it:

this.http.patch(BASE_URL + dailyEntry.id, { status: statusName});

And change your java backend to handle to receive the object and read the status

Or stringify it before sending it:

const statusName: string = JSON.stringify(status.name);

Answer 3

maybe you could put

namesMap.put("OPEN", OPEN);

as

namesMap.put("\"OPEN\"", OPEN);