Strange error: Cannot read attribute: element has children or text

[Deleted user]

I get "ERROR: 'ParseError at [row,col]:[1,33] Cannot read attribute: element has children or text" when I try to convert the following json to xml.

{
    "test" : 
    {
        "@TransTyp" : "0",
        "Hdr" : {}
    }
}

If I change it a little, everything is fine. These are converted without problem:

{
    "test" : 
    {
        "@TransType" : "0",
        "Hdr" : {}
    }
}

{
    "test" : 
    {
        "@TransTyp" : "0",
        "child" : {}
    }
}

Can you help me?

Thanks,
Marko

[beckchr]

First input works for me, I get:

<?xml version='1.0' encoding='UTF-8'?>
<test TransTyp="0">
    <Hdr/>
</test>

Can you attach code and input file to show the problem?

[Deleted user]

Sorry, the input json I provided was not correct, because I did some json processing in between. Here is the actual problem.

When I convert the following json, there is no problem.

{"test":{"@attr":"1", "child":"1"}}

But when I put child element first and attribute second, I get error. This does not work:

{"test":{"child":"1", "@attr":"1"}}

And my function for conversion.

private String xml2json(String xmlInput) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        StringReader inputReader = new StringReader(xmlInput);

        try {
            JsonXMLConfig config = new JsonXMLConfigBuilder().autoArray(true).autoPrimitive(true).prettyPrint(true).build();

            XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader(inputReader);
            Source source = new StAXSource(reader);

            XMLStreamWriter writer = new JsonXMLOutputFactory(config).createXMLStreamWriter(baos);
            Result result = new StAXResult(writer);
            TransformerFactory.newInstance().newTransformer().transform(source, result);

        } catch (Exception ex) {
            log.error("xml2json: " + ex.getMessage(), ex);
        } finally {
            try {
                baos.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }

        return baos.toString();
    }

[beckchr]

Okay, the input is invalid because objects starting with "@" are interpreted as XML attributes and attributes must come before children or text content ("$"). This is implied by the way the StAX API is designed (all attributes are available after the start element has been read).