如何从 JSON 对象序列化中排除焊接元数据

How to exclude Weld metadata from JSON object serialization

假设以下 REST 资源:

@Path("/ActiveLeadTask")
//Also possible MediaType.APPLICATION_XML
@Produces(MediaType.APPLICATION_JSON)
public class ActiveLeadTask {
    private @Inject ActiveLeadTaskBo activeLeadBo;

    @GET
    @Path("/getBo")
    public ActiveLeadTaskBo getBo() {
        return activeLeadBo;
    }
}
////////////////////////////////////////////////////
@XmlRootElement
@XmlAccessorType(XmlAccessType.PUBLIC_MEMBER)
public class ActiveLeadTaskBo implements Serializable {
    private static final long serialVersionUID = 1L;

    private String firstName;

    private String lastName;

    private String phoneNumber;
    private String phoneCountryCode;

    private AtomicInteger accessCounterField = new AtomicInteger(0);

    public ActiveLeadTaskBo() {
        firstName = "test";
        lastName = "test";
    }

    public int getAccessCounter() {
        return accessCounterField.incrementAndGet();
    }

    public void setAccessCounter(int seed) {
        accessCounterField.set(seed);
    }

    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

getBo() 的 REST 响应 JSON(但不是 XML)returns 以下内容:

{
  "accessCounter": 1,
  "firstName": "test",
  "lastName": "test",
  "metadata": {
    "contextualInstance": {
      "accessCounter": 2,
      "firstName": "test",
      "lastName": "test"
    },
    "instance": {
      "accessCounter": 3,
      "firstName": "test",
      "lastName": "test"
    }
  }
}

JSON 响应包含一个额外的 "metadata" 字段 - 如何将项目配置为不生成它或避免生成它? CDI容器是Weld,JSON序列化器由Yasson提供。

两种可能的解决方案:

  • 创建包装器 class,例如 ActiveLeadTaskBoInjectWrapper:
@Inject
ActiveLeadTaskBoInjectWrapper activeLeadBo;


activeLeadBo.getInstance();
  • 解决方法焊接细节:
@Inject
Foo foo;

public void doSomething() {
  if (foo instanceof WeldClientProxy) {
    // foo is a proxy
    ((WeldClientProxy)foo).getMetadata().getContextualInstance()
  } else {
    // not a proxy
  }
}

取决于您的 REST 端点中使用的 JSON 处理框架。对于 jsonb-api (jsr367),唯一可能的解决方案是实施 javax.json.bind.config.PropertyVisibilityStrategy 以从处理中排除生成的属性。