我决定使用Simple XML serialization,但遇到了一些基本的问题。我正在尝试将java.util.UUID
类实例序列化为这个小类中的final字段:
@Root
public class Identity {
@Attribute
private final UUID id;
public Identity(@Attribute UUID id) {
this.id = id;
}
}
Tutorial展示了如何通过如下方式注册转换器来序列化第三方对象:
Registry registry = new Registry();
registry.bind(UUID.class, UUIDConverter.class);
Strategy strategy = new RegistryStrategy(registry);
Serializer serializer = new Persister(strategy);
serializer.write( object, stream );
适用于UUID的转换器非常简单:
public class UUIDConverter implements Converter<UUID> {
@Override
public UUID read(InputNode node) throws Exception {
return new UUID.fromString(node.getValue());
}
@Override
public void write(OutputNode node, UUID value) throws Exception {
node.setValue(value.toString());
}
}
但是这个简单的代码对我不起作用,在序列化带有UUID字段的对象时,抛出了类java.util.UUID不支持的转换异常。
我已经尝试了一些类似的自定义Matcher
(不在教程中),它们对我来说是有效的:
Serializer serializer = new Persister(new MyMatcher());
serializer.write( object, stream );
Matcher
类看起来像这样:
public static class MyMatcher implements Matcher {
@Override
@SuppressWarnings("unchecked")
public Transform match(Class type) throws Exception {
if (type.equals(UUID.class))
return new UUIDTransform();
return null;
}
}
public class UUIDTransform implements Transform<UUID> {
@Override
public UUID read(String value) throws Exception {
return UUID.fromString(value);
}
@Override
public String write(UUID value) throws Exception {
return value.toString();
}
}
问题:
对于流式传输第三方类,Converter?
谢谢。
https://stackoverflow.com/questions/3626208
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