Javadoc for URLDataSource:
No java doc description for getContentType. Current implementation does:
Opens a URLConnnection. If successful returns the value of URLConnection.getContentType
if not, returns null.

    /**
     * The getOutputStream method from DataSource
     */
    public InputStream getInputStream() throws IOException {

Note the mismatch between doc and method name. For both getInput and getOutputStream, a more
meaningful description would be:
return the ...Stream from the URLConnection, first opening and caching the connection if necessary.