Example usage for javax.script ScriptEngine eval

Introduction

In this page you can find the example usage for javax.script ScriptEngine eval.

Prototype

public Object eval(Reader reader) throws ScriptException;

Source Link

Document

Same as eval(String) except that the source of the script is provided as a Reader

Usage

From source file:org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngineOverGraphTest.java

@Test
@LoadGraphWith(LoadGraphWith.GraphData.MODERN)
public void shouldClearBindingsBetweenEvals() throws Exception {
    final ScriptEngine engine = new GremlinGroovyScriptEngine();
    engine.put("g", g);
    engine.put("marko", convertToVertexId("marko"));
    assertEquals(g.V(convertToVertexId("marko")).next(), engine.eval("g.V(marko).next()"));

    final Bindings bindings = engine.createBindings();
    bindings.put("g", g);
    bindings.put("s", "marko");

    assertEquals(engine.eval("g.V().has('name',s).next()", bindings), g.V(convertToVertexId("marko")).next());

    try {//from ww  w.  j ava  2  s. com
        engine.eval("g.V().has('name',s).next()");
        fail("This should have failed because s is no longer bound");
    } catch (Exception ex) {
        final Throwable t = ExceptionUtils.getRootCause(ex);
        assertEquals(MissingPropertyException.class, t.getClass());
        assertTrue(t.getMessage().startsWith("No such property: s for class"));
    }

}

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From source file:org.jasig.maven.plugin.sass.AbstractSassMojo.java

/**
 * Execute the SASS Compilation Ruby Script
 *//* w w w  . j a va2s  .c  o m*/
protected void executeSassScript(String sassScript) throws MojoExecutionException, MojoFailureException {
    final Log log = this.getLog();
    System.setProperty("org.jruby.embed.localcontext.scope", "threadsafe");

    log.debug("Execute SASS Ruby Script:\n" + sassScript);

    final ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
    final ScriptEngine jruby = scriptEngineManager.getEngineByName("jruby");
    try {
        CompilerCallback compilerCallback = new CompilerCallback(log);
        jruby.getBindings(ScriptContext.ENGINE_SCOPE).put("compiler_callback", compilerCallback);
        jruby.eval(sassScript);
        if (failOnError && compilerCallback.hadError()) {
            throw new MojoFailureException("SASS compilation encountered errors (see above for details).");
        }
    } catch (final ScriptException e) {
        throw new MojoExecutionException("Failed to execute SASS ruby script:\n" + sassScript, e);
    }
}

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From source file:org.tinymediamanager.scraper.util.YoutubeLinkExtractor.java

private String decryptSignature(String encryptedSignature) throws Exception {
    // first extract the player url and download the js player
    Matcher matcher = playerUrlPattern.matcher(jsonConfiguration);
    if (matcher.find()) {
        // only download the player javascript the first time
        if (StringUtils.isBlank(playerJavascript)) {
            Url jsPlayer = new Url("https:" + matcher.group(1).replaceAll("\\\\", ""));
            StringWriter writer = new StringWriter();
            IOUtils.copy(jsPlayer.getInputStream(), writer, "UTF-8");
            playerJavascript = writer.toString();
        }/* w  ww. j  a v  a 2 s  .  com*/
        if (StringUtils.isBlank(playerJavascript)) {
            return "";
        }

        // here comes the magic: extract the decrypt JS functions and translate them to Java :)
        matcher = patternDecryptFunction.matcher(playerJavascript);
        if (matcher.find()) {
            String decryptFunction = matcher.group(1);

            // extract relevant JS code
            String javaScript = extractJavascriptCode(playerJavascript, decryptFunction);

            // create a script engine manager
            ScriptEngineManager factory = new ScriptEngineManager();
            ScriptEngine engine = factory.getEngineByName("JavaScript");
            engine.eval(javaScript);
            Invocable inv = (Invocable) engine;

            // invoke the function to decrypt the signature
            String result = (String) inv.invokeFunction(decryptFunction, encryptedSignature);

            return result;
        }
    }
    return "";
}

---

From source file:org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngineOverGraphTest.java

@Test
@LoadGraphWith(LoadGraphWith.GraphData.CLASSIC)
public void shouldProperlyHandleBindings() throws Exception {
    final ScriptEngine engine = new GremlinGroovyScriptEngine();
    engine.put("g", g);
    engine.put("marko", convertToVertexId("marko"));
    Assert.assertEquals(g.V(convertToVertexId("marko")).next(), engine.eval("g.V(marko).next()"));

    final Bindings bindings = engine.createBindings();
    bindings.put("g", g);
    bindings.put("s", "marko");
    bindings.put("f", 0.5f);
    bindings.put("i", 1);
    bindings.put("b", true);
    bindings.put("l", 100l);
    bindings.put("d", 1.55555d);

    assertEquals(engine.eval("g.E().has('weight',f).next()", bindings),
            g.E(convertToEdgeId("marko", "knows", "vadas")).next());
    assertEquals(engine.eval("g.V().has('name',s).next()", bindings), g.V(convertToVertexId("marko")).next());
    assertEquals(engine.eval(/*ww  w  .  j  a  v a 2  s .  co m*/
            "g.V().sideEffect{it.get().property('bbb',it.get().value('name')=='marko')}.iterate();g.V().has('bbb',b).next()",
            bindings), g.V(convertToVertexId("marko")).next());
    assertEquals(engine.eval(
            "g.V().sideEffect{it.get().property('iii',it.get().value('name')=='marko'?1:0)}.iterate();g.V().has('iii',i).next()",
            bindings), g.V(convertToVertexId("marko")).next());
    assertEquals(engine.eval(
            "g.V().sideEffect{it.get().property('lll',it.get().value('name')=='marko'?100l:0l)}.iterate();g.V().has('lll',l).next()",
            bindings), g.V(convertToVertexId("marko")).next());
    assertEquals(engine.eval(
            "g.V().sideEffect{it.get().property('ddd',it.get().value('name')=='marko'?1.55555d:0)}.iterate();g.V().has('ddd',d).next()",
            bindings), g.V(convertToVertexId("marko")).next());
}

---

From source file:de.ingrid.mdek.mapping.ScriptImportDataMapper.java

private void doMap(Map<String, Object> parameters) throws Exception {
    try {/* www  .j a v  a  2  s. co  m*/
        ScriptEngine engine = this.getScriptEngine();

        // pass all parameters
        for (String param : parameters.keySet())
            engine.put(param, parameters.get(param));
        engine.put("log", log);

        // execute the mapping
        log.debug("Mapping with script: " + mapperScript);
        engine.eval(new InputStreamReader(mapperScript.getInputStream()));

    } catch (ScriptException e) {
        log.error("Error while evaluating the script!", e);
        throw e;
    } catch (IOException e) {
        log.error("Error while accessing the mapper script!", e);
        throw e;
    }

}

---

From source file:com.jkoolcloud.tnt4j.streams.filters.JavaScriptActivityExpressionFilter.java

@Override
public boolean doFilter(ActivityInfo activityInfo) throws FilterException {
    ScriptEngineManager factory = new ScriptEngineManager();
    ScriptEngine engine = factory.getEngineByName(JAVA_SCRIPT_LANG);

    if (CollectionUtils.isNotEmpty(exprVars)) {
        Object fValue;/*from w w w  .  j  av a2 s.c om*/
        String fieldName;
        for (String eVar : exprVars) {
            fieldName = eVar.substring(2, eVar.length() - 1);
            fValue = activityInfo.getFieldValue(fieldName);
            fieldName = placeHoldersMap.get(eVar);
            factory.put(StringUtils.isEmpty(fieldName) ? eVar : fieldName, fValue);
        }
    }

    try {
        boolean match = (boolean) engine.eval(StreamsScriptingUtils.addDefaultJSScriptImports(getExpression()));

        boolean filteredOut = isFilteredOut(getHandleType(), match);
        activityInfo.setFiltered(filteredOut);

        return filteredOut;
    } catch (Exception exc) {
        throw new FilterException(StreamsResources.getStringFormatted(StreamsResources.RESOURCE_BUNDLE_NAME,
                "ExpressionFilter.filtering.failed", filterExpression), exc);
    }
}

---

From source file:cc.arduino.net.CustomProxySelector.java

private Proxy pacProxy(String pac, URI uri) throws IOException, ScriptException, NoSuchMethodException {
    setAuthenticator(preferences.get(Constants.PREF_PROXY_AUTO_USERNAME),
            preferences.get(Constants.PREF_PROXY_AUTO_PASSWORD));

    URLConnection urlConnection = new URL(pac).openConnection();
    urlConnection.connect();/* w  w  w .  j  av  a  2 s  .c  om*/
    if (urlConnection instanceof HttpURLConnection) {
        int responseCode = ((HttpURLConnection) urlConnection).getResponseCode();
        if (responseCode != 200) {
            throw new IOException("Unable to fetch PAC file at " + pac + ". Response code is " + responseCode);
        }
    }
    String pacScript = new String(IOUtils.toByteArray(urlConnection.getInputStream()),
            Charset.forName("ASCII"));

    ScriptEngine nashorn = new ScriptEngineManager().getEngineByName("nashorn");
    nashorn.getBindings(ScriptContext.ENGINE_SCOPE).put("pac", new PACSupportMethods());
    Stream.of("isPlainHostName(host)", "dnsDomainIs(host, domain)", "localHostOrDomainIs(host, hostdom)",
            "isResolvable(host)", "isInNet(host, pattern, mask)", "dnsResolve(host)", "myIpAddress()",
            "dnsDomainLevels(host)", "shExpMatch(str, shexp)").forEach((fn) -> {
                try {
                    nashorn.eval("function " + fn + " { return pac." + fn + "; }");
                } catch (ScriptException e) {
                    throw new RuntimeException(e);
                }
            });
    nashorn.eval(pacScript);
    String proxyConfigs = callFindProxyForURL(uri, nashorn);
    return makeProxyFrom(proxyConfigs);
}

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From source file:org.opentestsystem.delivery.testreg.domain.constraintvalidators.JexlAssertValidator.java

@Override
public boolean isValid(final Object value, final ConstraintValidatorContext context) {
    Object evaluationResult;//  ww  w .  ja v  a  2 s. c om
    final ScriptEngine jexlScriptEngine = getJexlScriptEngine();
    boolean hasValueInImplicitEligibilityRule = false;
    final boolean isImplicitEligibilityRule = value instanceof ImplicitEligibilityRule;
    if (isImplicitEligibilityRule) {
        final ImplicitEligibilityRule ierValue = (ImplicitEligibilityRule) value;
        hasValueInImplicitEligibilityRule = StringUtils.isNotBlank(ierValue.getValue());
    }

    if (!isImplicitEligibilityRule || hasValueInImplicitEligibilityRule) {
        jexlScriptEngine.put(this.alias, value);

        try {
            evaluationResult = jexlScriptEngine.eval(this.script);
        } catch (final ScriptException e) {
            throw new ConstraintDeclarationException(e);
        }

        if (!(evaluationResult instanceof Boolean)) {
            throw new ConstraintDeclarationException("Evaluation Result should be a boolean type");
        }

        return Boolean.TRUE.equals(evaluationResult);
    }
    return true;
}

---

From source file:co.mcme.barry.listeners.ChatListener.java

@EventHandler(priority = EventPriority.MONITOR)
public void onMathChat(AsyncPlayerChatEvent event) {
    if (event.getMessage().contains(".math")) {
        Player p = event.getPlayer();//from   ww  w.j a v a  2  s  . c o m
        ScriptEngineManager mgr = new ScriptEngineManager();
        ScriptEngine engine = mgr.getEngineByName("JavaScript");
        String[] msg = event.getMessage().split(" ");
        if (msg.length > 1) {
            try {
                List<String> list = new ArrayList<>(Arrays.asList(msg));
                list.removeAll(Arrays.asList("", null, ".math"));
                String expression = StringUtils.join(list, " ");
                BarryPlugin.sendGlobalMessage("(" + ChatColor.DARK_AQUA + p.getName() + ChatColor.WHITE + ") "
                        + expression + " = " + engine.eval(expression));
            } catch (ScriptException ex) {
                b.sendTargetedMessage("I can't figure out that math problem.", p);
            }
        } else {
            b.sendTargetedMessage("I need to know what math to do", p);
        }
    }
}

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From source file:org.apache.nifi.scripting.ScriptEngineFactory.java

ScriptEngine getNewEngine(File scriptFile, String extension) throws ScriptException {
    ScriptEngine engine = scriptEngMgr.getEngineByExtension(extension);
    if (null == engine) {
        throw new IllegalArgumentException("No ScriptEngine exists for extension " + extension);
    }//from  w ww  .j av  a2  s.  co m
    // Initialize some paths
    StringBuilder sb = new StringBuilder();
    switch (extension) {
    case "rb":
        String parent = scriptFile.getParent();
        parent = StringUtils.replace(parent, "\\", "/");
        sb.append("$:.unshift '").append(parent).append("'\n").append("$:.unshift File.join '").append(parent)
                .append("', 'lib'\n");
        engine.eval(sb.toString());

        break;
    case "py":
        parent = scriptFile.getParent();
        parent = StringUtils.replace(parent, "\\", "/");
        String lib = parent + "/lib";
        sb.append("import sys\n").append("sys.path.append('").append(parent).append("')\n")
                .append("sys.path.append('").append(lib).append("')\n").append("__file__ = '")
                .append(scriptFile.getAbsolutePath()).append("'\n");
        engine.eval(sb.toString());
        break;
    default:
        break;
    }

    Object threading = engine.getFactory().getParameter(THREADING);
    // the MULTITHREADED status means that the scripts need to be careful about sharing state
    if (THREAD_ISOLATED.equals(threading) || STATELESS.equals(threading) || MULTITHREADED.equals(threading)) {
        // replace prior instance if any
        threadSafeEngines.put(extension, engine);
    }
    return engine;
}

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