Question

I am doing this using JAXB to unmarshall some XML into Java objects:

My code looks a little like this:

InputStream testMsg = getClass().getResourceAsStream('TestDocumentEvent.xml'); Unmarshaller unmarshaller = JAXBContext.newInstance(DocumentEvent.class).createUnmarshaller(); DocumentEvent unmarshalled = (DocumentEvent) unmarshaller.unmarshal(testMsg); 

However, when I run this code I get an exception:

java.lang.IllegalArgumentException: is parameter must not be null 

What’s going on?

Answer 1

This is because the InputStream you are passing to the unmarshaller (‘is’ parameter, geddit) is null, check that the resource name is correct.