Unable to Deserialize a simple enum - json

Question

This is my class User
#JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "userType")
#JsonSubTypes({
#JsonSubTypes.Type(value = Broker.class, name = "BROKER"),
#JsonSubTypes.Type(value = Admin.class, name = "ADMIN")
})
public class User {
protected String password;
#Id
protected String username;
protected boolean accountNonExpired=true, accountNonBlocked=true, enabled=true, credentialNonExpired=true;
protected String[] grantedAuthorities;
protected UserType userType;
public User(){
}
public UserType getUserType() {
return userType;
}
public void setUserType(UserType userType) {
this.userType = userType;
}
#Override
public String toString() {
return "User{" +
"password='" + password + '\'' +
", username='" + username + '\'' +
", accountNonExpired=" + accountNonExpired +
", accountNonBlocked=" + accountNonBlocked +
", enabled=" + enabled +
", credentialNonExpired=" + credentialNonExpired +
", grantedAuthorities=" + Arrays.toString(grantedAuthorities) +
", userType=" + userType +
'}';
}
It uses an enum as a field of type `UserType
public enum UserType {
BROKER("BROKER"),ADMIN("ADMIN");
private static Map<String, UserType> FORMAT_MAP = Stream
.of(UserType.values())
.collect(Collectors.toMap(s -> s.value, Function.identity()));
private final String value;
UserType(String value) {
this.value = value;
}
#JsonCreator
public static UserType fromString(String string) {
return Optional
.ofNullable(FORMAT_MAP.get(string))
.orElseThrow(() -> new IllegalArgumentException(string));
}
#JsonValue
public String getValue(){
return value;
}
}
But ObjectMapper is not able to deserialize the UserType enum
My Json String :
{"password":"135","username":"cooper","accountNonExpired":true,"grantedAuthorities":["ROLE_BROKER"],"userType":"BROKER","brokerName":null,"accountNonLocked":true,"credentialsNonExpired":true,"enabled":true}
This is the code to deserialze :
User user = objectMapper.readValue(jsonString,User.class);
But after desierializing to User object, this is how the user object looks :
{password='135', username='cooper', accountNonExpired=true, accountNonBlocked=true, enabled=true, credentialNonExpired=true, grantedAuthorities=[ROLE_BROKER], userType=null}
As you can see, userType is null. What is going wrong?

Answer 1

It works after I changed the include = JsonTypeInfo.As.EXISTING_PROPERTY to include = JsonTypeInfo.As.PROPERTY.