Ejemplo n.º 1
0
  /**
   * Invokes a function defined in the script.
   *
   * @param funcName The function name.
   * @param params The parameter array.
   * @return A boolean value representing whether the function is executed correctly. If the
   *     function cannot be found, or parameters don't match, {@code false} is returned.
   */
  public boolean invokeFunction(String funcName, Object[] params) {
    // Run script if it is dirty. This makes sure the script is run
    // on the same thread as the caller (suppose the caller is always
    // calling from the same thread).
    checkDirty();

    String statement = getInvokeStatement(funcName, params);

    Bindings localBindings = mLocalEngine.getBindings(ScriptContext.ENGINE_SCOPE);
    if (localBindings == null) {
      localBindings = mLocalEngine.createBindings();
      mLocalEngine.setBindings(localBindings, ScriptContext.ENGINE_SCOPE);
    }

    fillBindings(localBindings, params);

    try {
      mLocalEngine.eval(statement);
    } catch (ScriptException e) {
      return false;
    } finally {
      removeBindings(localBindings, params);
    }

    return true;
  }
  public void testMethodIndirection() throws Exception {
    PythonScriptEngineInitializer initializer = new PythonScriptEngineInitializer();
    ScriptEngine engine = initializer.instantiate(Collections.<String>emptySet(), null);

    Bindings bindings = engine.createBindings();
    Tester tester = new Tester();
    bindings.put("tester", tester);

    engine.setBindings(bindings, ScriptContext.ENGINE_SCOPE);

    engine.eval("tester.increment()");

    Assert.assertEquals(tester.getInvocationCoung(), 1, "Unexpected number of tester invocations.");

    Map<String, Set<Method>> methods = getMethodsByName(Tester.class);
    for (Set<Method> ms : methods.values()) {
      Set<String> fns = initializer.generateIndirectionMethods("tester", ms);
      for (String fn : fns) {
        engine.eval(fn);
      }
    }

    engine.eval("increment()");
    Assert.assertEquals(
        tester.getInvocationCoung(),
        2,
        "Unexpected number of tester invocations after calling an indirected method.");
  }
 public double[] fitfunc(double[] fitparams) {
   Bindings b = engine.createBindings();
   for (int i = 0; i < 10; i++) b.put("P" + (i + 1), fitparams[i]);
   /*String script1="P1="+fitparams[0]+"; "+
   "P2="+fitparams[1]+"; "+
   "P3="+fitparams[2]+"; "+
   "P4="+fitparams[3]+"; "+
   "P5="+fitparams[4]+"; "+
   "P6="+fitparams[5]+"; "+
   "P7="+fitparams[6]+"; "+
   "P8="+fitparams[7]+"; "+
   "P9="+fitparams[8]+"; "+
   "P10="+fitparams[9]+"; "+
   exdef+"; x=";
   String script2="; retval="+function+";";*/
   try {
     double[] temp = new double[tempx.length];
     for (int i = 0; i < tempx.length; i++) {
       // temp[i]=((Double)engine.eval(script1+(double)tempx[i]+script2)).doubleValue();
       b.put("x", tempx[i]);
       b.put("y", tempdata[i]);
       temp[i] = (Double) cs.eval(b);
     }
     return temp;
   } catch (Exception e) {
     IJ.log(e.getMessage());
     return null;
   }
 }
Ejemplo n.º 4
0
  /** Test of createBindings method, of class Jsr223JRubyEngine. */
  @Test
  public void testCreateBindings() {
    logger1.info("createBindings");
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine instance = manager.getEngineByName("jruby");
    Bindings bindings = instance.getBindings(ScriptContext.ENGINE_SCOPE);
    Bindings result = instance.createBindings();
    assertNotSame(bindings, result);

    instance.getBindings(ScriptContext.ENGINE_SCOPE).clear();
    instance = null;
  }
Ejemplo n.º 5
0
  private Bindings createBindings(Entity entity, Version version) {

    Bindings bindings = engine.createBindings();

    Set<Metric> metrics = entity.getMetrics();
    for (Metric metric : metrics) {
      Double metricValue = entity.getMetricValue(version, metric);
      bindings.put(metric.getNickname(), metricValue);
    }

    return bindings;
  }
Ejemplo n.º 6
0
 @Test
 public void testScript() throws Exception {
   ScriptEngineManager manager = new ScriptEngineManager();
   manager.put("welcome", "hello"); // 设置全局变量
   ScriptEngine engine = manager.getEngineByName("httl");
   engine.put("page", "test"); // 设置引擎变量
   Bindings bindings = engine.createBindings();
   bindings.put("user", "liangfei"); // 设置执行变量
   String result =
       (String)
           engine.eval(
               "#set(String welcome, String page, String user)${welcome}, ${user}, this is ${page} page."); // 执行表达式
   assertEquals("hello, liangfei, this is test page.", result);
 }
Ejemplo n.º 7
0
  private static Bindings createBindings(
      final Graph graph, final Vertex vertex, final Edge edge, final ScriptEngine scriptEngine) {
    final Bindings bindings = scriptEngine.createBindings();
    bindings.put(GRAPH_VARIABLE, graph);

    if (vertex != null) {
      bindings.put(VERTEX_VARIABLE, vertex);
    }

    if (edge != null) {
      bindings.put(EDGE_VARIABLE, edge);
    }
    return bindings;
  }
Ejemplo n.º 8
0
  /**
   * Perform mediation with static inline script of the given scripting language
   *
   * @param synCtx message context
   * @return true, or the script return value
   * @throws ScriptException For any errors , when compile , run the script
   */
  private Object mediateForInlineScript(MessageContext synCtx) throws ScriptException {
    ScriptMessageContext scriptMC = new ScriptMessageContext(synCtx, xmlHelper);
    processJSONPayload(synCtx, scriptMC);
    Bindings bindings = scriptEngine.createBindings();
    bindings.put(MC_VAR_NAME, scriptMC);

    Object response;
    if (compiledScript != null) {
      response = compiledScript.eval(bindings);
    } else {
      response = scriptEngine.eval(scriptSourceCode, bindings);
    }

    return response;
  }
  private ScriptManager() {
    dialog = new JDialog();
    panel = new ScriptEditorPanel(dialog);
    dialog.setTitle("Script Editor - Wonderland Client");
    // 2. Optional: What happens when the frame closes?
    dialog.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);

    // 3. Create component and put them in the frame.
    dialog.setContentPane(panel);

    // 4. Size the frame.
    dialog.pack();

    // Next, acquire the scripting magicry
    engineManager = new ScriptEngineManager(LoginManager.getPrimary().getClassloader());
    scriptEngine = engineManager.getEngineByName("JavaScript");
    scriptBindings = scriptEngine.createBindings();

    // Add the necessary script bindings
    scriptBindings.put("Client", ClientContextJME.getClientMain());

    stringToCellID = new HashMap<String, CellID>();

    // Load the methods into the library
    ScannedClassLoader loader = LoginManager.getPrimary().getClassloader();
    Iterator<ScriptMethodSPI> iter = loader.getInstances(ScriptMethod.class, ScriptMethodSPI.class);

    // grab all global void methods
    while (iter.hasNext()) {
      final ScriptMethodSPI method = iter.next();
      addFunctionBinding(method);
      SwingUtilities.invokeLater(
          new Runnable() {
            public void run() {
              panel.addLibraryEntry(method);
            }
          });
    }

    // grab all returnablesa
    Iterator<ReturnableScriptMethodSPI> returnables =
        loader.getInstances(ReturnableScriptMethod.class, ReturnableScriptMethodSPI.class);
    while (returnables.hasNext()) {
      ReturnableScriptMethodSPI method = returnables.next();
      addFunctionBinding(method);
      panel.addLibraryEntry(method);
    }
  }
 public Traversal.Admin<S, E> apply(final Graph graph) {
   try {
     final ScriptEngine engine = SingleGremlinScriptEngineManager.get(this.scriptEngineName);
     final Bindings engineBindings = engine.createBindings();
     engineBindings.put("g", this.traversalSourceFactory.createTraversalSource(graph));
     for (int i = 0; i < this.bindings.length; i = i + 2) {
       engineBindings.put((String) this.bindings[i], this.bindings[i + 1]);
     }
     final Traversal.Admin<S, E> traversal =
         (Traversal.Admin<S, E>) engine.eval(this.traversalScript, engineBindings);
     if (!traversal.isLocked()) traversal.applyStrategies();
     return traversal;
   } catch (final ScriptException e) {
     throw new IllegalStateException(e.getMessage(), e);
   }
 }
Ejemplo n.º 11
0
 /**
  * Executes the specified {@code script} with the {@code ScriptEngine} that is registered for
  * {@code language} and {@code languageVersion}.
  *
  * <p>The default {@link ScriptContext} for the {@link ScriptEngine} is used. It uses {@code
  * bindings} as the {@link ScriptContext#ENGINE_SCOPE} Bindings of the ScriptEngine during the
  * script execution. Three new attributes are added to the bindings: contentGraphProvider,
  * contentHandler, and tcManager. The Reader, Writer and non-ENGINE_SCOPE Bindings of the default
  * ScriptContext are used. The ENGINE_SCOPE Bindings of the ScriptEngine is not changed, and its
  * mappings are unaltered by the script execution.
  *
  * @param script The script language source to be executed.
  * @param bindings The Bindings of attributes to be used for script execution.
  * @param language The script language. It is used to determine the ScriptEngine.
  * @param languageVersion The version of the script language. It is used to determine the
  *     ScriptEngine.
  * @return The value returned from the execution of {@code script}.
  * @throws ScriptException If an error occurrs in the script.
  * @throws NoEngineException If no engine can be found for the specified language
  * @see javax.script.ScriptEngine#eval(java.lang.String, javax.script.Bindings)
  */
 public Object execute(String script, Bindings bindings, String language, String languageVersion)
     throws ScriptException, NoEngineException {
   ScriptEngine engine = getScriptEngine(language, languageVersion);
   if (engine == null) {
     logger.warn(
         "Cannot execute script: " + "No engine available for language {}({})",
         language,
         languageVersion);
     throw new NoEngineException(new ScriptLanguageDescription(language, languageVersion));
   }
   if (bindings == null) {
     bindings = engine.createBindings();
   }
   addBindings(bindings);
   return engine.eval(script, bindings);
 }
Ejemplo n.º 12
0
  public static void main(String[] args) throws ScriptException, FileNotFoundException {
    // 脚本引擎管理器
    // ScriptEngineManager manager = new ScriptEngineManager();
    /*List<ScriptEngineFactory> list = manager.getEngineFactories();
    for(ScriptEngineFactory engine : list)
    {
    	System.out.println(engine.getEngineName());
    }*/

    // 脚本引擎管理器
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    // 向引擎中添加变量绑定
    engine.eval("n=1728");
    Object result = engine.eval("n+1"); // 1729.0
    System.out.println(result);

    // 获取由脚本语句绑定的变量
    engine.put("k", 100);
    result = engine.eval("k+1"); // 101
    System.out.println(result);

    // 除了向引擎或全局作用域添加绑定外,还可以将绑定收集到一个类型为 Bindings 的对象中,
    // 然后将其传递给 eval 方法:
    Bindings scope = engine.createBindings();
    scope.put("a", "hello, ");
    result = engine.eval("a+ 'world!'", scope); // hello, world!
    System.out.println(result);

    // 重定向输入和输出
    // 任何用 js 的 print 和 println函数产生的输出都会发送到 writer
    StringWriter writer = new StringWriter();
    engine.getContext().setWriter(new PrintWriter(new File("com/corejava/chapter10/output.txt")));
    engine.eval("print('hello world, this msg is from java app')");
  }
Ejemplo n.º 13
0
  /**
   * Invokes a function defined in the script.
   *
   * @param funcName The function name.
   * @param params The parameter array.
   * @return A boolean value representing whether the function is executed correctly. If the
   *     function cannot be found, or parameters don't match, {@code false} is returned.
   */
  public boolean invokeFunction(String funcName, Object[] params) {
    // Run script if it is dirty. This makes sure the script is run
    // on the same thread as the caller (suppose the caller is always
    // calling from the same thread).
    checkDirty();

    // Skip bad functions
    if (isBadFunction(funcName)) {
      return false;
    }

    String statement = getInvokeStatementCached(funcName, params);

    Bindings localBindings = null;
    synchronized (mEngineLock) {
      localBindings = mLocalEngine.getBindings(ScriptContext.ENGINE_SCOPE);
      if (localBindings == null) {
        localBindings = mLocalEngine.createBindings();
        mLocalEngine.setBindings(localBindings, ScriptContext.ENGINE_SCOPE);
      }
    }

    fillBindings(localBindings, params);

    try {
      mLocalEngine.eval(statement);
    } catch (ScriptException e) {
      // The function is either undefined or throws, avoid invoking it later
      addBadFunction(funcName);
      return false;
    } finally {
      removeBindings(localBindings, params);
    }

    return true;
  }
  @Override
  protected PicoContainer createContainerFromScript(
      final PicoContainer parentContainer, final Object assemblyScope) {
    Reader reader = null;
    ScriptEngine engine = null;
    final ScriptEngineManager mgr = new ScriptEngineManager();
    final ClassLoader oldClassLoader =
        AccessController.doPrivileged(
            new PrivilegedAction<ClassLoader>() {

              public ClassLoader run() {
                return Thread.currentThread().getContextClassLoader();
              }
            });
    final ClassLoader newClassLoader = this.getClassLoader();
    try {
      if (applyCustomClassLoader()) {
        AccessController.doPrivileged(
            new PrivilegedAction<Void>() {
              public Void run() {
                Thread.currentThread().setContextClassLoader(newClassLoader);
                return null;
              }
            });
      }

      engine = mgr.getEngineByName(engineName);
      if (engine == null) {
        final StringBuilder message =
            new StringBuilder(
                "Could not find a script engine named: '"
                    + engineName
                    + "' all script engines in your classpath are:\n");
        for (final ScriptEngineFactory eachFactory : mgr.getEngineFactories()) {
          message.append(
              "\t Engine named '"
                  + eachFactory.getEngineName()
                  + "' which supports the language '"
                  + eachFactory.getLanguageName()
                  + "' with short names '"
                  + Arrays.toString(eachFactory.getNames().toArray())
                  + "'\n");
        }

        throw new PicoCompositionException(message.toString());
      }

      final Bindings bindings = engine.createBindings();
      bindings.put("parent", parentContainer);
      bindings.put("assemblyScope", assemblyScope);
      applyOtherBindings(bindings);

      reader = this.getScriptReader();

      PicoContainer result = (PicoContainer) engine.eval(reader, bindings);
      if (result == null) {
        result = (PicoContainer) bindings.get("pico");
        if (result == null) {
          // Todo: remove as a deprecated variable name
          result = (PicoContainer) bindings.get("nano");
          if (result == null) {
            throw new PicoCompositionException(
                "Script completed successfully, but did not return any value, nor did it declare a variable named 'pico'");
          }
        }
      }
      return result;
    } catch (final ClassCastException e) {
      throw new ScriptedPicoContainerMarkupException(
          "The return type of the script must be of type PicoContainer", e);
    } catch (final IOException e) {
      throw new ScriptedPicoContainerMarkupException(
          "IOException encountered, message -'" + e.getMessage() + "'", e);
    } catch (final ScriptException e) {
      throw new ScriptedPicoContainerMarkupException(
          "Error executing composition script under engine '"
              + engine.getFactory().getEngineName()
              + "'",
          e);
    } finally {
      if (applyCustomClassLoader()) {
        AccessController.doPrivileged(
            new PrivilegedAction<Void>() {

              public Void run() {
                Thread.currentThread().setContextClassLoader(oldClassLoader);
                return null;
              }
            });
      }

      if (reader != null) {
        try {
          reader.close();
        } catch (final IOException e) {
          // Ignore
        }
      }
    }
  }