I'm trying to deserialise below JSON
payload with Jackson
:
{"code":null,"reason":"subscription yet available","message":"{ Message:\"subscription yet available\", SubscriptionUID:\"46b62920-c519-4555-8973-3b28a7a29463\" }"}
but I'm getting this JsonMappingException
:
Cannot construct instance of `com.ids.utilities.DeserializeSubscription` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: (String)"{"code":null,"reason":"subscription yet available","message":"{ Message:\"subscription yet available\", SubscriptionUID:\"46b62920-c519-4555-8973-3b28a7a29463\" }"}"; line: 1, column: 2]
I've created two classes. The first class:
import lombok.Data;
@Data
public class DeserializeSubscription {
private String code;
private String reason;
private MessageSubscription message;
public DeserializeSubscription(String code, String reason, MessageSubscription message) {
super();
this.code = code;
this.reason = reason;
this.message = message;
}
and the second class
import lombok.Data;
@Data
public class MessageSubscription {
private String message;
private String subscriptionUID;
public MessageSubscription(String message, String subscriptionUID) {
super();
this.message = message;
this.subscriptionUID = subscriptionUID;
}
In the main class:
try
{
ObjectMapper mapper = new ObjectMapper();
mapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);
DeserializeSubscription desSub=null;
desSub=mapper.readValue(e.getResponseBody(), DeserializeSubscription.class);
System.out.println(desSub.getMessage().getSubscriptionUID());
}
catch (JsonParseException e1) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (JsonMappingException e1) {
System.out.println(e1.getMessage());
e.printStackTrace();
}
catch (IOException e1) {
// TODO Auto-generated catch block
e.printStackTrace();
}
I've found this solution but I didn't work it https://facingissuesonit.com/2019/07/17/com-fasterxml-jackson-databind-exc-invaliddefinitionexception-cannot-construct-instance-of-xyz-no-creators-like-default-construct-exist-cannot-deserialize-from-object-value-no-delega/
The jackson maven I'm using in my application
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.10.2</version>
</dependency>
The message is pretty clear: (no Creators, like default construct, exist)
you need to add a no argument constructor to the class or the NoArgsConstructor
annotation:
@Data
public class DeserializeSubscription {
public DeserializeSubscription (){}
or
@NoArgsConstructor
@Data
public class DeserializeSubscription {
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