Question

I am using SaxonJ to perform XSLT transformation from Java.

My XSLT files have to output any debug/info as output since my transformation logic is complex.

Is there a way in which I can redirect to log4j so that I can store have the transformation information in a log file?

My system already uses log4j to log output to file. I want to append the transformation debug messages as well.

Any ideas?

Answer 1

I am pretty sure that you have already found out how to perform this. But I hope that my answer will be useful for other people.

All you need to do is implementing MessageListener interface: http://www.saxonica.com/documentation/javadoc/net/sf/saxon/s9api/MessageListener.html

public class MessageListenerImpl implements MessageListener {
    private static Logger logger = Logger.getLogger(MessageListenerImpl.class);

    public void message(XdmNode content, boolean terminate, SourceLocator locator) {
        if (terminate) {
            logger.error(content.getStringValue());
            System.exit(1);
        } else {
            logger.warn(content.getStringValue());
        }
    }
}