Ignoring DTDs when unmarshalling with EclipseLink MOXy

StackOverflow https://stackoverflow.com/questions/13068791

Question

When trying to unmarshall some XML into a POJO using EclipseLink MOXy I'm getting a FileNotFoundException where it's looking for the document's DTD as a relative path.

Exception in thread "main" org.springframework.oxm.UnmarshallingFailureException: JAXB unmarshalling exception; nested exception is javax.xml.bind.UnmarshalException
 - with linked exception:
[java.io.FileNotFoundException: C:\Users\deejay\Documents\workspace-sts-3.0.0.RELEASE\moxy-test\ieee_idams_exchange.dtd (The system cannot find the file specified)]
    at org.springframework.oxm.jaxb.Jaxb2Marshaller.convertJaxbException(Jaxb2Marshaller.java:761)
    at org.springframework.oxm.jaxb.Jaxb2Marshaller.unmarshal(Jaxb2Marshaller.java:682)
    at org.springframework.oxm.jaxb.Jaxb2Marshaller.unmarshal(Jaxb2Marshaller.java:665)
    at com.mendeley.services.utility.EclipseLinkMarshaller.load(EclipseLinkMarshaller.java:29)
    at com.mendeley.MoxyTest.main(MoxyTest.java:31)

I'm providing "externalized metadata" as per this example, so I've no idea why it even needs a DTD. If I could get it to ignore the DTD, or not try and resolve it, that'd be great.

Was it helpful?

Solution

You could unmarshal from an XMLStreamReader that has DTD support disabled:

import javax.xml.bind.*;
import javax.xml.stream.*;
import javax.xml.transform.stream.StreamSource;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(Customer.class);

        XMLInputFactory xif = XMLInputFactory.newFactory();
        xif.setProperty(XMLInputFactory.SUPPORT_DTD, false);
        XMLStreamReader xsr = xif.createXMLStreamReader(new StreamSource("input.xml"));

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        Customer customer = (Customer) unmarshaller.unmarshal(xsr);
    }

}

Extra

If you want to write the DTD declaration you could do the following:

    XMLOutputFactory xof = XMLOutputFactory.newFactory();
    XMLStreamWriter xsw = xof.createXMLStreamWriter(System.out);
    xsw.writeDTD("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">");

    Marshaller marshaller = jc.createMarshaller();
    marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
    marshaller.marshal(html, xsw);
    xsw.close();
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