我使用亚马逊网络服务SDK for Java的DynamoDB;试图足以@DynamoDBMarshalling接口：

I'm using Amazon Web Services SDK for Java for DynamoDB; trying to suffice the interface for @DynamoDBMarshalling:

Class<? extends DynamoDBMarshaller<? extends Object>> marshallerClass();

我建立接收任何枚举一个编组：

I build a marshaller that receives any Enum:

public class EnumMarshaller<T extends Enum<T>> implements DynamoDBMarshaller<T>
{
    @Override
    public String marshall(T getterReturnResult)
    {
        return getterReturnResult.toString();
    }

    @Override
    public T unmarshall(Class<T> clazz, String obj)
    {
        return Enum.valueOf(clazz, obj);
    }
}

现在的问题是，当我试图用我的现场注释我不出来：

The problem is that when I'm trying to use the annotation on my field I can't figure it out:

public static enum MyEnum {BLA, BLA2}

@DynamoDBMarshalling(marshallerClass=EnumMarshaller<MyEnum>.class)
    public MyEnum getStatus()
    {
        return status;
    }

我不能叫的.class上泛型类型和一些其他的尝试提出了不同的错误。 我开始认为这是不可能与亚马逊的合同...

I can't call .class on a generic type and some other tries came up different errors. I'm starting to think it's impossible with Amazon's contract...

推荐答案

以下的罚款对我说：

则Marshaller：

public class EnumMarshaller implements DynamoDBMarshaller<Enum> {
    @Override
    public String marshall(Enum getterReturnResult) {
        return getterReturnResult.name();
    }

    @Override
    public Enum unmarshall(Class<Enum> clazz, String obj) {
        return Enum.valueOf(clazz, obj);
    }
}

在我与枚举表类：

@DynamoDBMarshalling(marshallerClass=EnumMarshaller.class)
@DynamoDBAttribute(attributeName = "MyEnum")
public MyEnum getMyEnum() {
   return myEnum;
}