Java Code Examples for org.mozilla.javascript.Context#setLanguageVersion()

protected void executeScript( final Map<String, Object> params ) {
  final Context cx = Context.getCurrentContext();
  // env.js has methods that pass the 64k Java limit, so we can't compile
  // to bytecode. Interpreter mode to the rescue!
  cx.setOptimizationLevel( -1 );
  cx.setLanguageVersion( Context.VERSION_1_7 );

  final Object wrappedParams;
  if ( params != null ) {
    wrappedParams = Context.javaToJS( params, scope );
  } else {
    wrappedParams = Context.javaToJS( new HashMap<String, Object>(), scope );
  }

  try {
    ScriptableObject.defineProperty( scope, "params", wrappedParams, 0 );
    cx.evaluateReader( scope, new FileReader( source ), this.source, 1, null );
  } catch ( IOException ex ) {
    logger.error( "Failed to read " + source + ": " + ex.toString() );
  }
}
 

static String jsonToSdp(JSONObject json) throws InvalidDescriptionException {
    synchronized (SdpProcessor.class) {
        if (sInstance == null) {
            sInstance = new SdpProcessor();
        }
    }
    Context context = Context.enter();
    context.setOptimizationLevel(-1);
    context.setLanguageVersion(Context.VERSION_1_8);
    try {
        ScriptableObject scope = sInstance.getScope();
        Object result = sInstance.getJsonToSdpFunction().call(context, scope, scope, new Object[]{json.toString()});
        return "" + result;
    } catch (EvaluatorException e) {
        throw new InvalidDescriptionException("failed to parse sdp: " + e.getMessage(), e);
    } finally {
        Context.exit();
    }
}
 

/**
 * Setups a proper javascript context so that it can run javascript code properly under android.
 * For android we need to disable bytecode generation since the android vms don't understand JVM bytecode.
 * @return a proper javascript context
 */
static @NonNull Context enterJsContext() {
  final Context jsContext = Context.enter();

  // If we cause the context to throw a runtime exception from this point
  // we need to make sure that exit the context.
  try {
    jsContext.setLanguageVersion(Context.VERSION_1_8);

    // We can't let Rhino to optimize the JS and to use a JIT because it would generate JVM bytecode
    // and android runs on DEX bytecode. Instead we need to go in interpreted mode.
    jsContext.setOptimizationLevel(-1);
  } catch (RuntimeException e) {
    // Something bad happened to the javascript context but it might still be usable.
    // The first thing to do is to exit the context and then propagate the error.
    Context.exit();
    throw e;
  }

  return jsContext;
}
 

/**
 * {@inheritDoc}
 */
@Override
public Object convertApplicationLastResult(
        final List<LastResult> lastresults) throws ConversionException {
    if (lastresults == null || lastresults.isEmpty()) {
        return null;
    }
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_DEFAULT);
    final ScriptableObject scope = context.initStandardObjects();
    final LastResult lastresult = lastresults.get(0);
    final Scriptable vxml = context.newObject(scope);
    ScriptableObject.putProperty(vxml, "utterance",
            lastresult.getUtterance());
    ScriptableObject.putProperty(vxml, "confidence",
            lastresult.getConfidence());
    ScriptableObject.putProperty(vxml, "mode", lastresult.getInputmode());
    ScriptableObject.putProperty(vxml, "interpretation",
            lastresult.getInterpretation());
    return toJSON(vxml);
}
 

/**
 * {@inheritDoc}
 */
@Override
public Object convertRecognitionEvent(final DataModel model,
        final RecognitionEvent event) throws ConversionException {
    final RecognitionResult result = event.getRecognitionResult();
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_DEFAULT);
    final ScriptableObject scope = context.initStandardObjects();
    final Scriptable vxml = context.newObject(scope);
    ScriptableObject.putProperty(vxml, "utterance", result.getUtterance());
    ScriptableObject
            .putProperty(vxml, "confidence", result.getConfidence());
    ScriptableObject.putProperty(vxml, "mode", result.getMode());
    try {
        ScriptableObject.putProperty(vxml, "interpretation",
                result.getSemanticInterpretation(model));
    } catch (SemanticError e) {
        throw new ConversionException(e.getMessage(), e);
    }
    return toJSON(vxml);
}
 

@Test
public void testConvertApplicationLastResultSimpleSemanticInterpretation()
        throws Exception {
    final JsonExtensionNotificationDataConverter converter = new JsonExtensionNotificationDataConverter();
    final List<LastResult> list = new java.util.ArrayList<LastResult>();
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_1_6);
    final Scriptable scope = context.initStandardObjects();
    context.evaluateString(scope, "var out = 'yes';", "expr", 1, null);
    final Object out = scope.get("out", scope);
    final LastResult result = new LastResult("yeah", .75f, "voice", out);
    list.add(result);
    final String json = (String) converter
            .convertApplicationLastResult(list);
    Assert.assertEquals("vxml.input = {\"utterance\":\"yeah\","
            + "\"confidence\":0.75,\"interpretation\":\"yes\","
            + "\"mode\":\"voice\"}", json);
}
 

@Test
public void testConvertApplicationLastResultComplexSemanticInterpretation()
        throws Exception {
    final XmlExtensionNotificationDataConverter converter = new XmlExtensionNotificationDataConverter();
    final List<LastResult> list = new java.util.ArrayList<LastResult>();
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_1_6);
    final Scriptable scope = context.initStandardObjects();
    context.evaluateString(scope, "var out = new Object();", "expr", 1,
            null);
    context.evaluateString(scope, "var out = new Object();", "expr", 1,
            null);
    context.evaluateString(scope, "out.order = new Object();", "expr", 1,
            null);
    context.evaluateString(scope, "out.order.topping = 'Salami';", "expr",
            1, null);
    context.evaluateString(scope, "out.order.size = 'medium';", "expr", 1,
            null);
    context.evaluateString(scope, "out.date = 'now';", "expr", 1, null);
    final Object out = scope.get("out", scope);
    final LastResult result = new LastResult("yes", .75f, "voice", out);
    list.add(result);
    final Element element = (Element) converter
            .convertApplicationLastResult(list);
    System.out.println(toString(element));
}
 

private void runTest(int optLevel)
    throws IOException
{

    Context cx = RhinoAndroidHelper.prepareContext();
    cx.setLanguageVersion(Context.VERSION_1_8);
    cx.setOptimizationLevel(optLevel);
    Global root = new Global(cx);
    TestUtils.addAssetLoading(root);
    root.put("RUN_NAME", root, "SunSpider-" + optLevel);
    Object result = cx.evaluateString(root, TestUtils.readAsset(TEST_SRC), TEST_SRC, 1, null);
    results.put(optLevel, result.toString());
}
 

private SdpProcessor() {
    Context context = Context.enter();
    context.setOptimizationLevel(-1);
    context.setLanguageVersion(Context.VERSION_1_8);
    mScope = context.initStandardObjects();

    try {
        context.evaluateString(mScope, sSdpJsSource, "sdp.js", 1, null);
        mSdpToJsonFunction = context.compileFunction(mScope, "function sdpToJson(sdp) { return JSON.stringify(SDP.parse(sdp)); }", "sdpToJson", 1, null);
        mJsonToSdpFunction = context.compileFunction(mScope, "function jsonToSdp(sdp) { return SDP.generate(JSON.parse(sdp)); }", "jsonToSdp", 1, null);
    } finally {
        Context.exit();
    }
}
 

/**
 * Safe retrieval of the current context.
 * @return context
 * @since 0.7.9
 */
private Context getContext() {
    Context context = Context.getCurrentContext();
    if (context == null) {
        context = Context.enter();
        context.setLanguageVersion(Context.VERSION_DEFAULT);
    }
    return context;
}
 

public Object executeSisr() {
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_DEFAULT);
    final Scriptable globalScope = context.initStandardObjects();

    if (globalExecutation != null) {
        globalExecutation.execute(context, globalScope);
    }
    final ScriptableObject scriptable = (ScriptableObject) globalScope;
    scriptable.sealObject();

    // Set up working scope - note out initialized at this level, but
    // shouldn't be used
    Scriptable workingScope = context.newObject(globalScope);
    context.evaluateString(
            workingScope,
            "var out=new Object();\nvar rules=new Object();\n"
                    + "var meta={current: function() {return {text:'', score:1.0};}};\n",
            "SISR init from MatchConsumer", 0, null);

    if (executationCollection.size() != 1) {
        LOGGER.error("Execution collection was not 1: "
                + executationCollection.size());
    }

    // At the top level, there should only be one item, a context for the
    // rule being fired.
    for (ExecutableSemanticInterpretation si : executationCollection) {
        si.execute(context, workingScope);
    }

    // Since the last item was a rule, we can return rules.latest
    return context.evaluateString(workingScope, "rules.latest();",
            "SISR from MatchConsumer", 0, null);
}
 

@Test
public void testConvertApplicationLastResultSimpleSemanticInterpretation()
        throws Exception {
    final XmlExtensionNotificationDataConverter converter = new XmlExtensionNotificationDataConverter();
    final List<LastResult> list = new java.util.ArrayList<LastResult>();
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_1_6);
    final Scriptable scope = context.initStandardObjects();
    context.evaluateString(scope, "var out = 'yes';", "expr", 1, null);
    final Object out = scope.get("out", scope);
    final LastResult result = new LastResult("yeah", .75f, "voice", out);
    list.add(result);
    Element element = (Element) converter.convertApplicationLastResult(list);
    System.out.println(toString(element));
}
 

@Test
public void testConvertApplicationLastResultComplexSemanticInterpretation()
        throws Exception {
    final JsonExtensionNotificationDataConverter converter = new JsonExtensionNotificationDataConverter();
    final List<LastResult> list = new java.util.ArrayList<LastResult>();
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_1_6);
    final Scriptable scope = context.initStandardObjects();
    context.evaluateString(scope, "var out = new Object();", "expr", 1,
            null);
    context.evaluateString(scope, "var out = new Object();", "expr", 1,
            null);
    context.evaluateString(scope, "out.order = new Object();", "expr", 1,
            null);
    context.evaluateString(scope, "out.order.topping = 'Salami';", "expr",
            1, null);
    context.evaluateString(scope, "out.order.size = 'medium';", "expr", 1,
            null);
    context.evaluateString(scope, "out.date = 'now';", "expr", 1, null);
    final Object out = scope.get("out", scope);
    final LastResult result = new LastResult("yes", .75f, "voice", out);
    list.add(result);
    final String json = (String) converter
            .convertApplicationLastResult(list);
    Assert.assertEquals("vxml.input = {\"utterance\":\"yes\","
            + "\"confidence\":0.75,\"interpretation\":{\"order\":"
            + "{\"topping\":\"Salami\",\"size\":\"medium\"},"
            + "\"date\":\"now\"},\"mode\":\"voice\"}", json);
}
 

/**
 * Packs the given SSML document into a JSON structure.
 * 
 * @param speakable
 *            the speakable with the SSML document
 * @return JSON formatted string
 */
private String toJson(final SpeakableText speakable) {
    final Context context = Context.enter();
    context.setLanguageVersion(Context.VERSION_DEFAULT);
    final ScriptableObject scope = context.initStandardObjects();
    final String ssml = speakable.getSpeakableText();
    final Scriptable vxml = context.newObject(scope);
    ScriptableObject.putProperty(vxml, "ssml", ssml);
    return toJSON(vxml);
}
 

@Override
protected Context makeContext() {
    Context cx = super.makeContext();
    cx.setLanguageVersion(Context.VERSION_1_8);
    cx.setOptimizationLevel(COMPILER_MODE);
    return cx;
}
 

private void runTest(int optLevel)
    throws IOException
{


    Context cx = RhinoAndroidHelper.prepareContext();
    cx.setLanguageVersion(Context.VERSION_1_8);
    cx.setOptimizationLevel(optLevel);
    Global root = new Global(cx);
    TestUtils.addAssetLoading(root);
    root.put("RUN_NAME", root, "V8-Benchmark-" + optLevel);
    Object result = cx.evaluateString(root, TestUtils.readAsset(TEST_SRC), TEST_SRC, 1, null);
    results.put(optLevel, result.toString());
}
 

/**
 * Initializes this <code>LessCompiler</code>.
 * <p>
 * It is not needed to call this method manually, as it is called implicitly by the compile methods if needed.
 * </p>
 */
public synchronized void init() {
  final long start = System.currentTimeMillis();

  try {
    final Context cx = Context.enter();
    cx.setOptimizationLevel(-1);
    cx.setLanguageVersion(Context.VERSION_1_7);

    final Global global = new Global();
    global.init(cx);

    scope = cx.initStandardObjects(global);

    final List<URL> jsUrls = new ArrayList<URL>(2 + customJs.size());
    jsUrls.add(envJs);
    jsUrls.add(lessJs);
    jsUrls.addAll(customJs);

    for(final URL url : jsUrls){
      final InputStreamReader inputStreamReader = new InputStreamReader(url.openConnection().getInputStream());
      try{
        cx.evaluateReader(scope, inputStreamReader, url.toString(), 1, null);
      }finally{
        inputStreamReader.close();
      }
    }
    doIt = cx.compileFunction(scope, COMPILE_STRING, "doIt.js", 1, null);
  }
  catch (final Exception e) {
    final String message = "Failed to initialize LESS compiler.";
    log.error(message, e);
    throw new IllegalStateException(message, e);
  }finally{
    Context.exit();
  }

  if (log.isDebugEnabled()) {
    log.debug("Finished initialization of LESS compiler in " + (System.currentTimeMillis() - start) + " ms.");
  }
}