序列化问题在枚举的Andr​​oid [英] Serialization problem with Enums at Android

问题描述

我用XStream序列一些对象到XML，以及现在面临与枚举的问题。我得到当我尝试序列化对象的异常：ObjectAccessException：无效的最后一个字段java.lang.Enum.name。

I'm using XStream to serialize some objects to XML, and am facing a problem with Enums. The exception I get when I try to serialize the object: "ObjectAccessException: invalid final field java.lang.Enum.name".

显然，这是在Android的反射API实现了一个问题：它没有正确处理最后的领域。这个问题确实存在于过去官方的太阳（Oracle）的JDK的实现。

Apparently, this is a problem with the reflection API implementation in android: It doesn't treat final fields correctly. This problem actually existed in past implementations of the official Sun (Oracle) JDK.

你能确定/反驳，这是与Android的问题？你可以提出任何其他序列化的API，可以在这个情况下使用？

Can you confirm/refute this is the problem with Android? Can you suggest any other serialization API that could be used in this situation?

推荐答案

我能找到解决这个问题是创建一个AbstractSingleValueConverter的枚举，然后使用XStream注册的唯一方法。

The only way i could find to get around this is to create a AbstractSingleValueConverter for enums and then register it with xstream.

public class SingleValueEnumConverter extends AbstractSingleValueConverter
{
    private final Class enumType;

    public SingleValueEnumConverter(Class type)
    {
        this.enumType = type;
    }

    public boolean canConvert(Class c)
    {
        return c.equals(enumType);
    }

    public Object fromString(String value)
    {
        return Enum.valueOf(enumType, value);
    }
}

使用

XStream xml = new XStream();
xml.registerConverter(new SingleValueEnumConverter([ENUM].class));

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