有没有办法将Java枚举序列化到YAML或从YAML序列化?

我正在尝试序列化和反序列化一个Java对象,该对象包含到YAML表示的枚举。我想用杰克逊( com.fasterxml.jackson )包来完成此操作。

我一直得到这个例外:

Caused by: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `com.beastcode.devops.prometheusbroker.domain.Metric$Type` from String "counter": not one of the values accepted for Enum class: [GAUGE, COUNTER]

我想我需要某种适配器或转换器,但不知道YAML有什么可用的(如果有的话)。

供参考:

Metric.java:

public class Metric {

  public enum Type {
    COUNTER, GAUGE
  }

  private String           name;
  private String           description;
  private Type             type;
  private List<String>     labels;
  private List<MetricData> data;

  // getters/setters removed
}

data.yaml:

---
name: gitlab_pipeline_success_total
description: "blah blah blah"
type: counter
labels:
  - project
  - somethingElse
data:

Parser.java:

public class Parser {

  private ObjectMapper mapper = new ObjectMapper(new YAMLFactory());

  public void parse() throws StreamReadException, DatabindException, IOException {
    Metric m = mapper.readValue(new File("data.yaml"), Metric.class);
  }

}