Examples of org.pdf4j.saxon.Controller

org.pdf4j.saxon.Controller
The Controller is Saxon's implementation of the JAXP Transformer class, and represents an executing instance of a transformation or query. Multiple concurrent executions of the same transformation or query will use different Controller instances. This class is therefore not thread-safe.
The Controller is serially reusable, as required by JAXP: when one transformation or query is finished, it can be used to run another. However, there is no advantage in doing this rather than allocating a new Controller each time.
The Controller can also be used when running Java applications that use neither XSLT nor XQuery. A dummy Controller is created when running free-standing XPath expressions.
The Controller holds those parts of the dynamic context that do not vary during the course of a transformation or query, or that do not change once their value has been computed. This also includes those parts of the static context that are required at run-time.
Wherever possible XSLT applications should use the JAXP Transformer class directly, rather than relying on Saxon-specific methods in the Controller. However, some features are currently available only through this class. This applies especially to new features specific to XSLT 2.0, since the JAXP interface still supports only XSLT 1.0. Such methods may be superseded in the future by JAXP methods.
Many methods on the Controller are designed for internal use and should not be considered stable. From release 8.4 onwards, those methods that are considered sufficiently stable to constitute path of the Saxon public API are labelled with the JavaDoc tag "since": the value indicates the release at which the method was added to the public API. @author Michael H. Kay @since 8.4


    public void run(DynamicQueryContext env, Result result, Properties outputProperties) throws XPathException {
        if (isUpdating) {
            throw new XPathException("Cannot call run() on an updating query");
        }
        Controller controller = newController();
        initializeController(env, controller);


        if (allowDocumentProjection) {
            controller.setUseDocumentProjection(getPathMap());
        }
        Properties actualProperties = validateOutputProperties(controller, outputProperties);


        controller.defineGlobalParameters();


        XPathContextMajor context = initialContext(env, controller);


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


        context.openStackFrame(stackFrameMap);


        boolean mustClose = (result instanceof StreamResult &&
                ((StreamResult)result).getOutputStream() == null);
        context.changeOutputDestination(actualProperties, result, true,
                Configuration.XQUERY, Validation.PRESERVE, null);
        context.getReceiver().open();


        // Run the query
        try {
            expression.process(context);
        } catch (XPathException err) {
            controller.reportFatalError(err);
            throw err;
        }


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

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        if (isUpdating) {
            throw new XPathException("Cannot call pull() on an updating query");
        }
        Configuration config = dynamicEnv.getConfiguration();
        try {
            Controller controller = newController();
            //initializeController(dynamicEnv, controller);
            EventIterator iter = iterateEvents(controller, dynamicEnv);
            //iter = new Decomposer(iter, config);


            Properties actualProperties = validateOutputProperties(controller, outputProperties);

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        if (!isUpdating) {
            throw new XPathException("Calling runUpdate() on a non-updating query");
        }


        Configuration config = executable.getConfiguration();
        Controller controller = newController();
        initializeController(dynamicEnv, controller);
        XPathContextMajor context = initialContext(dynamicEnv, controller);
        try {
            PendingUpdateList pul = config.newPendingUpdateList();
            context.openStackFrame(stackFrameMap);
            expression.evaluatePendingUpdates(context, pul);
            pul.apply(context, staticContext.getRevalidationMode());
            return pul.getAffectedTrees();
        } catch (XPathException e) {
            if (!e.hasBeenReported()) {
                try {
                    controller.getErrorListener().fatalError(e);
                } catch (TransformerException e2) {
                    // ignore secondary error
                }
            }
            throw e;

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        if (!isUpdating) {
            throw new XPathException("Calling runUpdate() on a non-updating query");
        }


        Configuration config = executable.getConfiguration();
        Controller controller = newController();
        initializeController(dynamicEnv, controller);
        XPathContextMajor context = initialContext(dynamicEnv, controller);
        try {
            PendingUpdateList pul = config.newPendingUpdateList();
            context.openStackFrame(stackFrameMap);
            expression.evaluatePendingUpdates(context, pul);
            pul.apply(context, staticContext.getRevalidationMode());
            for (Iterator iter = pul.getAffectedTrees().iterator(); iter.hasNext();) {
                NodeInfo node = (NodeInfo)iter.next();
                agent.update(node, controller);
            }
        } catch (XPathException e) {
            if (!e.hasBeenReported()) {
                try {
                    controller.getErrorListener().fatalError(e);
                } catch (TransformerException e2) {
                    // ignore secondary error
                }
            }
            throw e;

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     */


    public int getNameCode(XPathContext context)
            throws XPathException {


        Controller controller = context.getController();
        NamePool pool = controller.getNamePool();


        String prefix;
        String localName;
        String uri = null;


        // name needs to be evaluated at run-time
        AtomicValue nameValue = (AtomicValue)elementName.evaluateItem(context);
        if (nameValue == null) {
            XPathException err1 = new XPathException("Invalid element name (empty sequence)", this);
            err1.setErrorCode((isXSLT() ? "XTDE0820" : "XPTY0004"));
            err1.setXPathContext(context);
            throw dynamicError(this, err1, context);
        }
        //nameValue = nameValue.getPrimitiveValue();
        if (nameValue instanceof StringValue) {  // which includes UntypedAtomic
            // this will always be the case in XSLT
            CharSequence rawName = nameValue.getStringValueCS();
            try {
                String[] parts = controller.getConfiguration().getNameChecker().getQNameParts(rawName);
                prefix = parts[0];
                localName = parts[1];
            } catch (QNameException err) {
                XPathException err1 = new XPathException("Invalid element name. " + err.getMessage(), this);
                err1.setErrorCode((isXSLT() ? "XTDE0820" : "XQDY0074"));

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     *
     * @return a newly constructed Controller
     */


    public Controller newController() {
        Controller controller = new Controller(executable.getConfiguration(), executable);
        executable.initializeBindery(controller.getBindery());
        if (isUpdating && controller.getTreeModel() == Builder.TINY_TREE) {
            controller.setTreeModel(Builder.LINKED_TREE);
        }
        return controller;
    }

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    */


    public Item evaluateItem(XPathContext context) throws XPathException {
        Item val = argument[0].evaluateItem(context);
        String label = argument[1].evaluateAsString(context).toString();
        Controller controller = context.getController();
        if (controller.isTracing()) {
            notifyListener(label, Value.asValue(val), context);
        } else {
            PrintStream out = controller.getTraceFunctionDestination();
            if (out != null) {
                traceItem(val, label, out);
            }
        }
        return val;

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    /**
    * Iterate over the results of the function
    */


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        Controller controller = context.getController();
        if (controller.isTracing()) {
            String label = argument[1].evaluateAsString(context).toString();
            Value value = Value.asValue(ExpressionTool.eagerEvaluate(argument[0], context));
            notifyListener(label, value, context);
            return value.iterate();
        } else {
            PrintStream out = controller.getTraceFunctionDestination();
            if (out == null) {
                return argument[0].iterate(context);
            } else {
                return new TracingIterator(argument[0].iterate(context),
                        argument[1].evaluateAsString(context).toString(),

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                throw new AssertionError(
                        "evaluateItem() is not implemented in the subclass " + getClass());
        } else if ((m & ITERATE_METHOD) != 0) {
            return iterate(context).next();
        } else {
            Controller controller = context.getController();
            XPathContext c2 = context.newMinorContext();
            c2.setOrigin(this);
            SequenceOutputter seq = controller.allocateSequenceOutputter(1);
            PipelineConfiguration pipe = controller.makePipelineConfiguration();
            pipe.setHostLanguage(getHostLanguage());
            seq.setPipelineConfiguration(pipe);
            c2.setTemporaryReceiver(seq);
            process(c2);
            seq.close();

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                return SingletonIterator.makeIterator(item);
            }
        } else if ((m & ITERATE_METHOD) != 0) {
            throw new AssertionError("iterate() is not implemented in the subclass " + getClass());
        } else {
            Controller controller = context.getController();
            XPathContext c2 = context.newMinorContext();
            c2.setOrigin(this);
            SequenceOutputter seq = controller.allocateSequenceOutputter(20);
            PipelineConfiguration pipe = controller.makePipelineConfiguration();
            pipe.setHostLanguage(getHostLanguage());
            seq.setPipelineConfiguration(pipe);
            c2.setTemporaryReceiver(seq);
            process(c2);
            seq.close();

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org.pdf4j.saxon.event.Sender

org.pdf4j.saxon.event.SerializerFactory

org.pdf4j.saxon.event.Stripper

org.pdf4j.saxon.expr.EarlyEvaluationContext

org.pdf4j.saxon.expr.ExpressionTool

org.pdf4j.saxon.expr.SimpleExpression

org.pdf4j.saxon.expr.XPathContextMajor

org.pdf4j.saxon.functions.DocAvailable

org.pdf4j.saxon.functions.FormatNumber

org.pdf4j.saxon.functions.Idref

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