JAXB XMLAdapter方法不会抛出异常 [英] JAXB XMLAdapter method does not throws Exception

问题描述

我正在使用JAXB XMLadapter来编组和解组布尔值。应用程序的XML文件也将由C＃应用程序访问。我们必须验证此XML文件，这是使用XSD完成的。 C＃应用程序为布尔节点写入True值。但是我们的XSD也证实了这一点，因为它只允许真/假或1/0。因此，我们在XSD中保留了String的布尔值，并且该字符串将由XMLAdapter验证，以便我们编组和解组。
XML适配器如下：

I am using JAXB XMLadapter to marshal and unmarshal Boolean values. The application's XML file will be accessed by C# application also. We have to validate this XML file and this is done using XSD. C# application writes "True" value for Boolean nodes. But the same does get validated by our XSD as it only allows "true/false" or "1/0". So we have kept String for boolean values in XSD and that string will be validated by XMLAdapter to marshal and unmarshal on our side. The XML Adapter is as follows:

public class BooleanAdapter extends XmlAdapter<String, Boolean> {

    @Override
    public Boolean unmarshal(String v) throws Exception {

        if(v.equalsIgnoreCase("true") || v.equals("1")) {
            return true;
        } else if(v.equalsIgnoreCase("false") || v.equals("0")) {
            return false;
        } else {
            throw new Exception("Boolean Value from XML File is Wrong.");
        }
    }

    @Override
    public String marshal(Boolean v) throws Exception {
        return v.toString();        
    }
}

上述代码在正常情况下有效，但无效时从xml文件读取数据（例如：abcd或）然后throw new Exception（）;没有传播，Unmarshal进程继续读取下一个节点。
我希望应用程序在抛出异常时立即停止。
看来我的异常被吃光了。
非常感谢任何帮助。

The code above works in normal conditions, but when invalid data(eg: "abcd" or "") is read from xml file then the "throw new Exception();" is not getting propagated and the Unmarshal process moves on to read next node. I want the application to stop as soon as an exception is thrown. It seems my Exception is getting eaten away. Any help is much appreciated.

如何解决这个问题？

推荐答案

来自 XMLAdapter #unmarshal（ValueType） ：

抛出：
java.lang.Exception - 如果转换过程中出现错误。调用者负责通过ValidationEventHandler向用户报告错误。

Throws: java.lang.Exception - if there's an error during the conversion. The caller is responsible for reporting the error to the user through ValidationEventHandler.

所以，是 - 异常吃掉，然后使用 ValidationEventHandler ，不会抛到堆栈顶部。

So, yes - the exception is eaten and then reported using ValidationEventHandler, not thrown to the top of your stack.

检查您是否是已经使用任何（自定义的，可能的） ValidationEventHandler 对您的例外进行分组，或使用 DefaultValidationEventHandler ，如下所示：

Check if you are already using any (custom, perhaps) ValidationEventHandler that groups your exceptions, or use DefaultValidationEventHandler, like this:

unmarshaller.setEventHandler(new DefaultValidationEventHandler());

第一次错误会导致解组失败。

It will cause unmarshalling failure on first error.

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