SPDXViewer error

[armintaenzertng]

I tried running the SPDXViewer functionality on the standard 2.3 JSON example and got the following error:

java -jar tools-java-1.1.6-SNAPSHOT-jar-with-dependencies.jar SPDXViewer SPDXJSONExample-v2.3.spdx.json
WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
17:02:26.550 [main] ERROR org.apache.jena.util.JenaXMLInput - Problem setting StAX property - name: "http://javax.xml.XMLConstants/property/accessExternalDTD" - value: "" - error: Unrecognized property 'http://javax.xml.XMLConstants/property/accessExternalDTD'
17:02:26.566 [main] ERROR org.apache.jena.riot - [line: 1, col: 1 ] Content is not allowed in prolog.
Error creating SPDX Document: [line: 1, col: 1 ] Content is not allowed in prolog.

[goneall]

It looks like SPDXViewer only supports RDF as the input format.

Should be an easy fix to support all file types - I'll see if I can get a PR submitted before the next release.