Examples of net.sf.saxon.Controller.addTraceListener()

net.sf.saxon.Controller.addTraceListener()

Adds the specified trace listener to receive trace events from this instance. Note that although TraceListeners can be added or removed dynamically, this has no effect unless the stylesheet or query has been compiled with tracing enabled. This is achieved by calling {@link Configuration#setTraceListener} or by settingthe attribute {@link FeatureKeys#TRACE_LISTENER} on theTransformerFactory. Conversely, if this property has been set in the Configuration or TransformerFactory, the TraceListener will automatically be added to every Controller that uses that Configuration. @param trace the trace listener. If null is supplied, the call has no effect. @since 8.4

    private Controller createTransformer(PreparedStylesheet pss) throws XPathException {
        Controller transformer = (Controller)pss.newTransformer();
        transformer.setInitialMode(initialMode);
        transformer.setInitialTemplate(initialTemplate);
        if (tracing) {
            transformer.addTraceListener(new XSLTTraceListener());
        }
        if (recoveryPolicy != null) {
            if (recoveryPolicy.equals("silent")) {
                transformer.setRecoveryPolicy(Configuration.RECOVER_SILENTLY);
            } else if (recoveryPolicy.equals("recover")) {

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