包含隐式集合的XStream问题

Question

<appConfig>
    <database isSource="true" fizz="129"/>
    <database isSource="false" fizz="29494" />
    <buzz bee="always" />
</appConfig>

public class AppConfig {
    private Database sourceDb;
    private Database targetDb;
    private Buzz buzz;
}

public class Database {
    // Omitted for brevity...
}

public class Buzz {
    // Omitted for brevity...
}

XStream oxMapper = new XStream();
oxMapper.alias("appConfig", AppConfig.class);
oxMapper.alias("database", Database.class);
oxMapper.alias("buzz",  Buzz.class);

ApplicationConfig appCfg = (ApplicationConfig)oxMapper.fromXML(
        getXMLSnippet());

但我得到了这个错误：

Element database of type com.myapp.Database is not defined as field in type com.myapp.AppConfig

我读过这篇关于隐式集合的文章，认为XStream认为我的两个database项是列表（隐式集合）的一部分，而实际上它们不是（它们应该映射到两个不同的appconfig属性）。

我怎么解决这个？提前道谢！

Answer 1

oxMapper.alias("sourceDb", Database.class);
oxMapper.alias("targetDb", Database.class);
oxMapper.alias("buzz",  Buzz.class);