[FIXED] Why I get error parsing JSON when get from Feign?

Issue

Here is my JSON I'm returning from my STUB:

{
  "brokerAccounts": [
     {
       "id": "4598",
       "customTags": [
         "main-buy"
       ]
     }
  ]
}

Here is the java class for an entity

@Data
@JsonIgnoreProperties(ignoreUnknown = true)
public class InvestBrokerAccountsRs {
    private List<InvestBrokerAccount> brokerAccounts;

    @Data
    @JsonIgnoreProperties(ignoreUnknown = true)
    public static class InvestBrokerAccount {
        private String id;
        private List<String> customTags;
    }
}

After trying to get it using Feign ResponseEntity<String> I'm getting this:

Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token

As I see, my json is valid. I have the @Data annotation which provides getters and setters. What is a problem?

Solution

It looks like to me that this is responsible - ResponseEntity<String>. You are trying to deserialize your json, which is in json object format into a string, which is not possible, since string format is different.

I think changing to:

ResponseEntity<InvestBrokerAccountsRs>

should fix your problem.

Answered By - Chaosfire
Answer Checked By - Terry (JavaFixing Volunteer)