Package wycs.syntax

Examples of wycs.syntax.WyalFile$Context

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     * </ul>
     */
    public static void execute(final String uri, final Evaluator evaluator) {
        try {
            String documentURI = getCanonicalURI(uri);
            Context rootCtx = evaluator.newContext(null);
            Tracer trc = new Tracer();
            SCXML doc = SCXMLReader.read(new URL(documentURI));
            if (doc == null) {
                System.err.println("The SCXML document " + uri
                        + " can not be parsed!");
                System.exit(-1);
            }
            System.out.println(SCXMLWriter.write(doc));
            SCXMLExecutor exec = new SCXMLExecutor(evaluator, null, trc);
            EventDispatcher ed = new SimpleScheduler(exec);
            exec.setEventdispatcher(ed);
            exec.setStateMachine(doc);
            exec.addListener(doc, trc);
            exec.registerInvokerClass("scxml", SimpleSCXMLInvoker.class);
            exec.setRootContext(rootCtx);
            exec.go();
            BufferedReader br = new BufferedReader(new
                InputStreamReader(System.in));
            String event;
            while ((event = br.readLine()) != null) {
                event = event.trim();
                if (event.equalsIgnoreCase("help") || event.equals("?")) {
                    System.out.println("Enter a space-separated list of "
                        + "events");
                    System.out.println("To populate a variable in the "
                        + "current context, type \"name=value\"");
                    System.out.println("To quit, enter \"quit\"");
                    System.out.println("To reset state machine, enter "
                        + "\"reset\"");
                } else if (event.equalsIgnoreCase("quit")) {
                    break;
                } else if (event.equalsIgnoreCase("reset")) {
                    exec.reset();
                } else if (event.indexOf('=') != -1) {
                    int marker = event.indexOf('=');
                    String name = event.substring(0, marker);
                    String value = event.substring(marker + 1);
                    rootCtx.setLocal(name, value);
                    System.out.println("Set variable " + name + " to "
                        + value);
                } else if (event == null || event.trim().length() == 0
                           || event.equalsIgnoreCase("null")) {
                    TriggerEvent[] evts = {new TriggerEvent(null,
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        else if (!transition.isNoEventsTransition()) {
            return false;
        }
        if (transition.getCond() != null) {
            Boolean result = Boolean.FALSE;
            Context context = exctx.getScInstance().getContext(transition.getParent());
            context.setLocal(Context.NAMESPACES_KEY, transition.getNamespaces());
            try {
                if ((result = exctx.getEvaluator().evalCond(context, transition.getCond())) == null) {
                    result = Boolean.FALSE;
                    if (exctx.getAppLog().isDebugEnabled()) {
                        exctx.getAppLog().debug("Treating as false because the cond expression was evaluated as null: '"
                                + transition.getCond() + "'");
                    }
                }
            }
            catch (SCXMLExpressionException e) {
                exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, "Treating as false due to error: "
                        + e.getMessage(), transition);
            }
            finally {
                context.setLocal(Context.NAMESPACES_KEY, null);
            }
            return result;
        }
        return true;
    }
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     * @param scInstance the state machine instance holding the system context
     * @param event The event being stored
     * @param internal Flag indicating the event was received internally or externally
     */
    public void setSystemEventVariable(final SCInstance scInstance, final TriggerEvent event, boolean internal) {
        Context systemContext = scInstance.getSystemContext();
        EventVariable eventVar = null;
        if (event != null) {
            String eventType = internal ? EventVariable.TYPE_INTERNAL : EventVariable.TYPE_EXTERNAL;

            final int triggerEventType = event.getType();
            if (triggerEventType == TriggerEvent.ERROR_EVENT || triggerEventType == TriggerEvent.CHANGE_EVENT) {
                eventType = EventVariable.TYPE_PLATFORM;
            }

            // TODO: determine sendid, origin, originType and invokeid based on context later.
            eventVar = new EventVariable(event.getName(), eventType, null, null, null, null, event.getPayload());
        }
        systemContext.setLocal(SCXMLSystemContext.EVENT_KEY, eventVar);
    }
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        Evaluator eval = exctx.getEvaluator();
        for (TransitionalState ts : statesToInvoke) {
            if (ts.getInvokes().isEmpty()) {
                continue;
            }
            Context context = scInstance.getContext(ts);
            for (Invoke i : ts.getInvokes()) {
                String src = i.getSrc();
                if (src == null) {
                    String srcexpr = i.getSrcexpr();
                    Object srcObj;
                    try {
                        context.setLocal(Context.NAMESPACES_KEY, i.getNamespaces());
                        srcObj = eval.eval(context, srcexpr);
                        context.setLocal(Context.NAMESPACES_KEY, null);
                        src = String.valueOf(srcObj);
                    } catch (SCXMLExpressionException see) {
                        exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                        exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, see.getMessage(), i);
                    }
                }
                String source = src;
                PathResolver pr = i.getPathResolver();
                if (pr != null) {
                    source = i.getPathResolver().resolvePath(src);
                }
                Invoker inv;
                try {
                    inv = exctx.newInvoker(i.getType());
                } catch (InvokerException ie) {
                    exctx.getInternalIOProcessor().addEvent(new TriggerEvent("failed.invoke."+ts.getId(), TriggerEvent.ERROR_EVENT));
                    continue;
                }
                List<Param> params = i.params();
                Map<String, Object> args = new HashMap<String, Object>();
                for (Param p : params) {
                    String argExpr = p.getExpr();
                    Object argValue = null;
                    context.setLocal(Context.NAMESPACES_KEY, p.getNamespaces());
                    // Do we have an "expr" attribute?
                    if (argExpr != null && argExpr.trim().length() > 0) {
                        try {
                            argValue = eval.eval(context, argExpr);
                        } catch (SCXMLExpressionException see) {
                            exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                            exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, see.getMessage(), i);
                        }
                    } else {
                        // No. Does value of "name" attribute refer to a valid
                        // location in the data model?
                        try {
                            argValue = eval.evalLocation(context, p.getName());
                            if (argValue == null) {
                                // Generate error, 4.3.1 in WD-scxml-20080516
                                exctx.getInternalIOProcessor().addEvent(new TriggerEvent(ts.getId() + ERR_ILLEGAL_ALLOC, TriggerEvent.ERROR_EVENT));
                            }
                        } catch (SCXMLExpressionException see) {
                            exctx.getInternalIOProcessor().addEvent(new TriggerEvent(TriggerEvent.ERROR_EXECUTION, TriggerEvent.ERROR_EVENT));
                            exctx.getErrorReporter().onError(ErrorConstants.EXPRESSION_ERROR, see.getMessage(), i);
                        }
                    }
                    context.setLocal(Context.NAMESPACES_KEY, null);
                    args.put(p.getName(), argValue);
                }
                String invokeId = exctx.setInvoker(i, inv);
                inv.setInvokeId(invokeId);
                inv.setParentIOProcessor(exctx.getExternalIOProcessor());
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    for(Pair<Path.Entry<?>,Path.Root> p : delta) {
      Path.Entry<WyilFile> sf = (Path.Entry<WyilFile>) p.first();
      Path.Root dst = p.second();
      Path.Entry<WyalFile> df = (Path.Entry<WyalFile>) dst.create(sf.id(), WyalFile.ContentType);
      generatedFiles.add(df);
      WyalFile contents = build(sf.read());
      // Write the file into its destination
      df.write(contents);
      // Then, flush contents to disk in case we generate an assertion
      // error later. In principle, this should be unnecessary when
      // syntax errors are no longer implemented as exceptions.
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  protected WyalFile build(WyilFile wyilFile) {
    this.filename = wyilFile.filename();

    // TODO: definitely need a better module ID here.
    final WyalFile wyalFile = new WyalFile(wyilFile.id(), filename);

    for (WyilFile.TypeDeclaration type : wyilFile.types()) {
      transform(type);
    }
    for (WyilFile.FunctionOrMethodDeclaration method : wyilFile.functionOrMethods()) {
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            sf.id(), WyalFile.ContentType);
        generatedFiles.add(df);
        WycsFile wf = sf.read();
        // NOTE: following is really a temporary hack
        new WycsFilePrinter(System.err).write(wf);
        WyalFile waf = decompile(wf);
        df.write(waf);
        count++;
      }
    }
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    return generatedFiles;
  }

  protected WyalFile decompile(WycsFile wycsFile) {
    return new WyalFile(wycsFile.id(), wycsFile.filename());
  }
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    int count = 0;
    for (Pair<Path.Entry<?>, Path.Root> p : delta) {
      Path.Entry<?> src = p.first();
      if (src.contentType() == WyalFile.ContentType) {
        Path.Entry<WyalFile> sf = (Path.Entry<WyalFile>) src;
        WyalFile wf = sf.read();
        count++;
        srcFiles.put(wf.id(), sf);
      }
    }

    logger.logTimedMessage("Parsed " + count + " source file(s).",
        System.currentTimeMillis() - tmpTime,
        tmpMem - runtime.freeMemory());

    // ========================================================================
    // Stub Generation
    // ========================================================================
    runtime = Runtime.getRuntime();
    tmpTime = System.currentTimeMillis();
    tmpMem = runtime.freeMemory();
    HashSet<Path.Entry<?>> generatedFiles = new HashSet<Path.Entry<?>>();
    for(Pair<Path.Entry<?>,Path.Root> p : delta) {
      Path.Entry<?> src = p.first();
      Path.Root dst = p.second();
      if (src.contentType() == WyalFile.ContentType) {
        Path.Entry<WyalFile> source = (Path.Entry<WyalFile>) src;
        Path.Entry<WycsFile> target = (Path.Entry<WycsFile>) dst.create(src.id(),WycsFile.ContentType);
        generatedFiles.add(target);
        WyalFile wf = source.read();
        WycsFile wycs = getModuleStub(wf);
        target.write(wycs);
      }
    }
    logger.logTimedMessage("Generated stubs for " + count + " source file(s).",
        System.currentTimeMillis() - tmpTime, tmpMem - runtime.freeMemory());

    // ========================================================================
    // Type source files
    // ========================================================================
    runtime = Runtime.getRuntime();
    tmpTime = System.currentTimeMillis();
    tmpMem = runtime.freeMemory();

    TypePropagation typer = new TypePropagation(this);
    for(Pair<Path.Entry<?>,Path.Root> p : delta) {
      Path.Entry<?> f = p.first();
      if (f.contentType() == WyalFile.ContentType) {
        Path.Entry<WyalFile> sf = (Path.Entry<WyalFile>) f;
        WyalFile wf = sf.read();
        typer.apply(wf);
      }
    }

    logger.logTimedMessage("Typed " + count + " source file(s).",
        System.currentTimeMillis() - tmpTime, tmpMem - runtime.freeMemory());


    // ========================================================================
    // Code Generation
    // ========================================================================
    runtime = Runtime.getRuntime();
    tmpTime = System.currentTimeMillis();
    tmpMem = runtime.freeMemory();

    CodeGeneration generator = new CodeGeneration(this);
    for (Pair<Path.Entry<?>, Path.Root> p : delta) {
      Path.Entry<?> src = p.first();
      Path.Root dst = p.second();
      if (src.contentType() == WyalFile.ContentType) {
        Path.Entry<WyalFile> source = (Path.Entry<WyalFile>) src;
        Path.Entry<WycsFile> target = (Path.Entry<WycsFile>) dst
            .create(src.id(), WycsFile.ContentType);
        WyalFile wf = source.read();
        WycsFile wycs = generator.generate(wf);
        target.write(wycs);
      }
    }
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