"Input mismatch reading Enum" after upgrade to Jackson 2.11

I’ve encountered this problem with Java too, when using @JsonCreator on factory method of an enum with a String parameter. Switching to @JsonCreator(mode = JsonCreator.Mode.DELEGATING) fixed the issue.

If test can be simplified to only use Java

How’s that:

package test;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonCreator.Mode;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JacksonTest
{
  public enum LinkType
  {
    TEST;

    @JsonCreator(mode = Mode.DEFAULT)
    public static LinkType fromString(@JsonProperty("type") String type) {
      return TEST;
    }
  }

  private final LinkType type;

  @JsonCreator
  public JacksonTest(@JsonProperty("type") LinkType type) {
    this.type = type;
  }

  @Override
  public String toString() {
    return "> " +  type;
  }

  public static void main(String[] args) throws Exception {
    String json = "{\"type\":\"TEST\"}";
    System.out.println(new ObjectMapper().readValue(json, JacksonTest.class));
  }
}

This works as is with Jackson 2.10.x but fails with aforementioned error on Jackson 2.11 unless

• JsonCreator.Mode.DELEGATING is used or
• @JsonProperty is dropped from fromString()

Which Jackson version behaves properly?