Examples of net.sf.saxon.trace.TraceListener

net.sf.saxon.trace.TraceListener
This interface defines methods that are called by Saxon during the execution of a stylesheet, if tracing is switched on. Tracing can be switched on by nominating an implementation of this class using the TRACE_LISTENER feature of the TransformerFactory, or using the addTraceListener() method of the Controller, which is Saxon's implementation of tyhe JAXP javax.xml.transform.Transformer interface.

        c2.setOrigin(this);
        c2.setCurrentIterator(iter);
        c2.setCurrentTemplate(null);


        if (controller.isTracing()) {
            TraceListener listener = controller.getTraceListener();
            while(true) {
                Item item = iter.next();
                if (item == null) {
                    break;
                }
                listener.startCurrentItem(item);
                action.process(c2);
                listener.endCurrentItem(item);
            }
        } else {
            while(true) {
                Item item = iter.next();
                if (item == null) {

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        controller.defineGlobalParameters(bindery);
        
        XPathContextMajor context = controller.newXPathContext();


        // In tracing/debugging mode, evaluate all the global variables first
        TraceListener tracer = controller.getConfiguration().getTraceListener();
        if (tracer != null) {
            controller.preEvaluateGlobals(context);
            tracer.open();
        }


        context.openStackFrame(stackFrameMap);
        if (node != null) {
            context.setCurrentIterator(SingletonIterator.makeIterator(node));
            controller.setPrincipalSourceDocument(node.getDocumentRoot());
        }        
        
        boolean mustClose = (result instanceof StreamResult &&
            ((StreamResult)result).getOutputStream() == null);
        context.changeOutputDestination(outputProperties, result, true, Validation.PRESERVE, null);


        // Run the query
        try {
            documentInstruction.process(context);
        } catch (XPathException err) {
            try {
                controller.getErrorListener().fatalError(err);
            } catch (TransformerException e) {
                //
            }
            throw err;
        }


        if (tracer != null) {
            tracer.close();
        }


        context.getReceiver().close();
        if (mustClose) {
            OutputStream os = ((StreamResult)result).getOutputStream();

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                        config.setTraceExternalFunctions(true);
                    }


                    else if (args[i].equals("-TL")) {
                        if (args.length < i+2) badUsage(name, "No TraceListener class specified");
                        TraceListener traceListener = Transform.makeTraceListener(args[++i]);
                        config.setTraceListener(traceListener);
                        config.setLineNumbering(true);
                        i++;
                    }

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                        factory.setURIResolver(makeURIResolver(r));
                    }


                    else if (args[i].equals("-T")) {
                        i++;
                        TraceListener traceListener = new net.sf.saxon.trace.XSLTTraceListener();
                        factory.setAttribute(
                                FeatureKeys.TRACE_LISTENER,
                                traceListener);
                        factory.setAttribute(
                                FeatureKeys.LINE_NUMBERING,
                                Boolean.TRUE);
                    }


                    else if (args[i].equals("-TP")) {
                        i++;
                        TraceListener traceListener = new net.sf.saxon.trace.TimedTraceListener();
                        factory.setAttribute(
                                FeatureKeys.TRACE_LISTENER,
                                traceListener);
                        factory.setAttribute(
                                FeatureKeys.LINE_NUMBERING,
                                Boolean.TRUE);
                    }


                    else if (args[i].equals("-TJ")) {
                        i++;
                        factory.setAttribute(
                                FeatureKeys.TRACE_EXTERNAL_FUNCTIONS,
                                Boolean.TRUE);
                    }


                    else if (args[i].equals("-TL")) {
                        i++;
                        if (args.length < i+2) badUsage(name, "No TraceListener class");
                        TraceListener traceListener = makeTraceListener(args[i++]);
                        factory.setAttribute(
                                FeatureKeys.TRACE_LISTENER,
                                traceListener);
                        factory.setAttribute(
                                FeatureKeys.LINE_NUMBERING,

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        InstructionDetails info = (InstructionDetails)getInstructionInfo();
        info.setConstructType(Location.TRACE_CALL);
        info.setNamespaceResolver(resolver);
        info.setProperty("label", label);
        info.setProperty("value", val);
        TraceListener listener = context.getController().getTraceListener();
        listener.enter(info, context);
        listener.leave(info);
    }

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                                              // No need to open a new stack frame!
                    defaultAction(node, parameters, tunnelParameters, context, locationId);


                } else {
                    Template template = (Template)rule.getAction();
                    TraceListener traceListener = controller.getTraceListener();
                    context.setLocalParameters(parameters);
                    context.setTunnelParameters(tunnelParameters);
                    context.openStackFrame(template.getStackFrameMap());
                    context.setOriginatingConstructType(Location.TEMPLATE);
                    context.setCurrentTemplateRule(rule);
                    traceListener.startCurrentItem(node);
                    tc = template.applyLeavingTail(context);
                    traceListener.endCurrentItem(node);
                }
            }


        } else {    // not tracing

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                        badUsage(command, "-tree option must be 'linked' or 'tiny'");
                    }
                    i++;
                } else if (option.equals("T")) {
                    i++;
                    TraceListener traceListener;
                    if (value == null) {
                        traceListener = new XQueryTraceListener();
                    } else {
                        traceListener = config.makeTraceListener(value);
                    }
                    config.setTraceListener(traceListener);
                    config.setLineNumbering(true);
                } else if (option.equals("TJ")) {
                    i++;
                    config.setTraceExternalFunctions(true);
                } else if (option.equals("TL")) {
                    if (args.length < i + 2) {
                        badUsage(command, "No TraceListener class specified");
                    }
                    TraceListener traceListener = config.makeTraceListener(args[++i]);
                    config.setTraceListener(traceListener);
                    config.setLineNumbering(true);
                    i++;
                } else if (option.equals("u")) {
                    useURLs = true;

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                                Boolean.valueOf(true));
                        showTime = true;
                        i++;
                    } else if (option.equals("T")) {
                        i++;
                        TraceListener traceListener;
                        if (value == null) {
                            traceListener = new net.sf.saxon.trace.XSLTTraceListener();
                        } else {
                            traceListener = config.makeTraceListener(value);
                        }
                        factory.setAttribute(FeatureKeys.TRACE_LISTENER, traceListener);
                        factory.setAttribute(FeatureKeys.LINE_NUMBERING, Boolean.TRUE);


                    } else if (option.equals("TJ")) {
                        i++;
                        factory.setAttribute(FeatureKeys.TRACE_EXTERNAL_FUNCTIONS,
                                Boolean.TRUE);
                    } else if (option.equals("TL")) {
                        i++;
                        if (args.length < i + 2) {
                            badUsage(command, "No TraceListener class");
                        }
                        TraceListener traceListener = config.makeTraceListener(args[i++]);
                        factory.setAttribute(FeatureKeys.TRACE_LISTENER,
                                traceListener);
                        factory.setAttribute(FeatureKeys.LINE_NUMBERING,
                                Boolean.TRUE);
                    } else if (option.equals("TP")) {
                        i++;
                        TraceListener traceListener = new net.sf.saxon.trace.TimedTraceListener();
                        factory.setAttribute(FeatureKeys.TRACE_LISTENER,
                                traceListener);
                        factory.setAttribute(FeatureKeys.LINE_NUMBERING,
                                Boolean.TRUE);
                    } else if (option.equals("tree")) {

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        c2.setCurrentIterator(groupIterator);
        c2.setCurrentGroupIterator(groupIterator);
        c2.setCurrentTemplateRule(null);


        if (controller.isTracing()) {
            TraceListener listener = controller.getTraceListener();
            while (true) {
                Item item = groupIterator.next();
                if (item == null) {
                    break;
                }
                listener.startCurrentItem(item);
                action.process(c2);
                listener.endCurrentItem(item);
            }
        } else {
            while (true) {
                Item item = groupIterator.next();
                if (item == null) {

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        InstructionDetails info = (InstructionDetails)getInstructionInfo();
        info.setConstructType(Location.TRACE_CALL);
        info.setNamespaceResolver(resolver);
        info.setProperty("label", label);
        info.setProperty("value", val);
        TraceListener listener = context.getController().getTraceListener();
        listener.enter(info, context);
        listener.leave(info);
    }

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