Java Code Examples for javax.script.ScriptContext#setWriter()

The following examples show how to use javax.script.ScriptContext#setWriter() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
@Override
public void run() {
	Database database = Factory.getSession(SessionType.CURRENT).getDatabase(databasePath_);

	ScriptEngineManager manager = new ScriptEngineManager();
	ScriptEngine engine = manager.getEngineByExtension(scriptExt_);

	engine.put("database", database);
	engine.put("session", database.getAncestorSession());

	ScriptContext context = engine.getContext();
	context.setWriter(new PrintWriter(System.out));
	context.setErrorWriter(new PrintWriter(System.err));

	try {
		engine.eval(script_);
	} catch (ScriptException e) {
		throw new RuntimeException(e);
	}
}
 
Example 2
Source Project: velocity-engine   File: EventToolTest.java    License: Apache License 2.0 6 votes vote down vote up
public void testHelloWorldTool() throws ScriptException {
    ScriptContext context = engine.getContext();
    Properties properties = new Properties();
    properties.put("resource.loader", "class");
    properties.put("class.resource.loader.description", "Template Class Loader");
    properties.put("class.resource.loader.class",
            "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    CustomEvent event = new CustomEvent("MyEvent");
    context.getBindings(ScriptContext.ENGINE_SCOPE).put("event", event);
    context.setAttribute(VelocityScriptEngine.VELOCITY_PROPERTIES_KEY, properties, ScriptContext.ENGINE_SCOPE);
    context.setAttribute(VelocityScriptEngine.FILENAME, "eventtool.vm", ScriptContext.ENGINE_SCOPE);
    Writer writer = new StringWriter();
    context.setWriter(writer);
    engine.eval("$event;\n" +
            "Event Created by $event.getName()\n" +
            "Event Created on $event.getDate()\n" +
            "Event ID is $event.getID()");
    // check string start
    String check = "This is a test event template: created by MyEvent on ";
    assertEquals(writer.toString().substring(0, check.length()), check);
}
 
Example 3
Source Project: beanshell   File: TestBshScriptEngine.java    License: Apache License 2.0 6 votes vote down vote up
@Test
public void test_method_invocation() throws Exception {
    ScriptEngine engine = new BshScriptEngineFactory().getScriptEngine();
    ScriptContext ctx = new SimpleScriptContext();
    StringWriter sw = new StringWriter();
    ctx.setWriter(sw);
    engine.setContext(ctx);
    engine.eval(
            "this.interpreter.print(new Object() {"
             + "public String toString() {"
                  +"return \"hello BeanShell\";"
             + "}"
          + "});"
        );
    assertEquals("hello BeanShell", sw.toString());
    sw.close();
}
 
Example 4
@Override
public Object eval(ScriptContext scriptContext) throws ScriptException
{
    VelocityContext velocityContext = VelocityScriptEngine.getVelocityContext(scriptContext);
    Writer out = scriptContext.getWriter();
    if (out == null)
    {
        out = new StringWriter();
        scriptContext.setWriter(out);
    }
    try
    {
        template.merge(velocityContext, out);
        out.flush();
    }
    catch (Exception exp)
    {
        throw new ScriptException(exp);
    }
    return out;
}
 
Example 5
/**
 * Evaluate the given script.
 * If you wish to get a resulting string, call getContext().setWriter(new StringWriter()) then call toString()
 * on the returned writer.
 * @param reader script source reader
 * @param ctx script context
 * @return the script context writer (by default a PrintWriter towards System.out)
 * @throws ScriptException
 */
public Object eval(Reader reader, ScriptContext ctx)
                   throws ScriptException
{
    initVelocityEngine(ctx);
    String fileName = getFilename(ctx);
    VelocityContext vctx = getVelocityContext(ctx);
    Writer out = ctx.getWriter();
    if (out == null)
    {
        out = new StringWriter();
        ctx.setWriter(out);
    }
    try
    {
        velocityEngine.evaluate(vctx, out, fileName, reader);
        out.flush();
    }
    catch (Exception exp)
    {
        throw new ScriptException(exp);
    }
    return out;
}
 
Example 6
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 7
protected Object evaluateExpression(Object expression, Map<String, Object> parameters) {
	try {
		Object result = null;
		StringWriter writer = new StringWriter();			
		
		ScriptContext context = new SimpleScriptContext();
		for (Map.Entry<String, Object> property : engineProperties.entrySet()) {
			context.setAttribute(property.getKey(), property.getValue(), ScriptContext.ENGINE_SCOPE);
		}
		Bindings bindings = context.getBindings(ScriptContext.ENGINE_SCOPE);
		bindings.putAll(parameters);
		context.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
		context.setWriter(writer);
		if (expression instanceof CompiledScript) {
			logger.debug("About to evaluate compiled expression {} with bindings {} on engine", expression, parameters, scriptEngine);
			result = ((CompiledScript) expression).eval(context);
		} else {
			logger.debug("About to evaluate expression {} with bindings {} on engine", expression, parameters, scriptEngine);
			result = scriptEngine.eval(expression.toString(), context);
		}
		if (result == null) {
			result = writer.toString();
		}
		return result;
	} catch (ScriptException e) {
		throw new RuntimeException("Error when evaluating script", e);
	}
}
 
Example 8
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 9
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 10
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 11
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 12
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 13
protected void start(boolean console) {
  ScriptContext context = engine.getContext();
  OutputStream out = getOutputStream();
  if (out != null) {
    context.setWriter(new PrintWriter(out));
  }
  OutputStream err = getErrorStream();
  if (err != null) {
    context.setErrorWriter(new PrintWriter(err));
  }
  // load "sa.js" initialization file
  loadInitFile();
  // load "~/jsdb.js" (if found) to perform user specific
  // initialization steps, if any.
  loadUserInitFile();

  JSJavaFactory fac = getJSJavaFactory();
  JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null;
  // call "main" function from "sa.js" -- main expects
  // 'this' object and jvm object
  call("main", new Object[] { this, jvm });

  // if asked, start read-eval-print console
  if (console) {
    processSource(null);
  }
}
 
Example 14
Source Project: sciview   File: REPLPane.java    License: BSD 2-Clause "Simplified" License 5 votes vote down vote up
/**
   * Constructs an interpreter UI pane for a SciJava scripting REPL.
   *
   * @param context The SciJava application context to use
   */
  public REPLPane(final Context context) {
    context.inject(this);
    output = new OutputPane(log);
    final JScrollPane outputScroll = new JScrollPane(output);
    outputScroll.setPreferredSize(new Dimension(440, 400));

    repl = new ScriptREPL(context, output.getOutputStream());
    repl.initialize();

    final Writer writer = output.getOutputWriter();
    final ScriptContext ctx = repl.getInterpreter().getEngine().getContext();
    ctx.setErrorWriter(writer);
    ctx.setWriter(writer);

    vars = new VarsPane(context, repl);
    vars.setBorder(new EmptyBorder(0, 0, 8, 0));

    prompt = new REPLEditor(repl, vars, output);
    context.inject(prompt);
    prompt.setREPLLanguage("Python");
    final JScrollPane promptScroll = new JScrollPane(prompt);

    final JPanel bottomPane = new JPanel();
    bottomPane.setLayout(new MigLayout("ins 0", "[grow,fill][pref]", "[grow,fill,align top]"));
    bottomPane.add(promptScroll, "spany 2");

    final JSplitPane outputAndPromptPane =
            new JSplitPane(JSplitPane.VERTICAL_SPLIT, outputScroll, bottomPane);
    outputAndPromptPane.setResizeWeight(1);
//    outputAndPromptPane.setDividerSize(2);

    mainPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, vars,
            outputAndPromptPane);
    mainPane.setDividerSize(1);
    mainPane.setDividerLocation(0);
  }
 
Example 15
Source Project: beanshell   File: TestBshScriptEngine.java    License: Apache License 2.0 5 votes vote down vote up
@Test
public void test_eval_writer_unicode() throws Exception {
    ScriptEngine engine = new BshScriptEngineFactory().getScriptEngine();
    ScriptContext ctx = new SimpleScriptContext();
    StringWriter sw = new StringWriter();
    ctx.setWriter(sw);
    engine.setContext(ctx);
    engine.eval("print('\\u3456');");
    assertEquals(new String("\u3456".getBytes(), "UTF-8").charAt(0),
            new String(sw.toString().getBytes(), "UTF-8").charAt(0));
}
 
Example 16
protected void enable() {

    console = new Console();
    console.setShell(new EnhancedShell(console.getShell())); //, scriptList));
    console.run();        
 
    // See if we have any script text from last time
    Preferences prefs = Preferences.userNodeForPackage(getClass());
    final String lastText = prefs.get(PREF_LAST_SCRIPT, null);
 
    if( lastText != null ) { 
        SwingUtilities.invokeLater( new Runnable() {
            public void run() {
                console.getInputArea().setText(lastText);
            }
        });
    }            
 
    outputWindow = console.getOutputWindow();
    frame = (JFrame)console.getFrame();
    
    GroovyShell shell = console.getShell();
 
    // So now that the console has been "run" we need to set the script
    // engine's stdout to the latest stdout.  This is done through
    // jsr223's ScriptContext.  Many Bothans died to bring us this
    // information.
    ScriptContext context = engine.getContext();
    context.setWriter(new PrintWriter(System.out));
}
 
Example 17
Source Project: scriptella-etl   File: ScriptConnection.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Instantiates a new connection to JSR 223 scripting engine.
 *
 * @param parameters connection parameters.
 */
public ScriptConnection(ConnectionParameters parameters) {
    super(parameters);
    String lang = parameters.getStringProperty(LANGUAGE);
    ScriptEngineManager scriptEngineManager = new ScriptEngineManager(ScriptConnection.class.getClassLoader());
    if (StringUtils.isEmpty(lang)) { //JavaScript is used by default
        LOG.fine("Script language was not specified. JavaScript is default.");
        lang = "js";
    }

    ScriptEngine engine = scriptEngineManager.getEngineByName(lang);
    if (engine == null) {
        throw new ConfigurationException("Specified " + LANGUAGE + "=" + lang + " not supported. Available values are: " +
                getAvailableEngines(scriptEngineManager));
    }
    engineWrapper = new ScriptEngineWrapper(engine);
    LOG.fine("Script engine selected: " + engine.getFactory().getEngineName());
    if (engineWrapper.isCompilable()) {
        cache = new IdentityHashMap<>();
    } else {
        LOG.info("Engine " + engine.getFactory().getEngineName() + " does not support compilation. Running in interpreted mode.");
    }
    if (engineWrapper.isNashornScriptEngine()) {
        LOG.warning("Nashorn JavaScript Engine is not fully supported. \n" +
                "See https://github.com/scriptella/scriptella-etl/issues/2 for status and workarounds.");
    }
    if (!StringUtils.isEmpty(parameters.getUrl())) { //if url is specified
        url = parameters.getResolvedUrl();
        //setUp reader and writer for it
        ScriptContext ctx = engine.getContext();
        ctx.setReader(new LazyReader());
        //JS engine bug - we have to wrap with PrintWriter, because otherwise print function won't work.
        ctx.setWriter(new PrintWriter(new LazyWriter()));
    }
    encoding = parameters.getCharsetProperty(ENCODING);
    ScriptEngineFactory f = engine.getFactory();
    setDialectIdentifier(new DialectIdentifier(f.getLanguageName(), f.getLanguageVersion()));
}
 
Example 18
private void configureEngine() {

        ScriptContext context = new SimpleScriptContext();
        context.setWriter(output);
        context.setErrorWriter(output);

        engine.setContext(context);
        engine.put("out", output);
        engine.put("err", output);

        output.println(MessageFormat.format("Script language set to {0}.", engine.getFactory().getLanguageName()));

        final URL url = findInitScript();
        if (url != null) {
            output.println(MessageFormat.format("Loading initialisation script ''{0}''...", url));
            execute0(url, new Observer() {
                @Override
                public void onSuccess(Object value) {
                }

                @Override
                public void onFailure(Throwable throwable) {
                    output.println("Failed to load initialisation script. " +
                            "BEAM-specific language extensions are disabled.");
                    throwable.printStackTrace(output);
                }
            });
            output.println("Initialisation script loaded. BEAM-specific language extensions are enabled.");
        } else {
            output.println("No initialisation script found. " +
                    "BEAM-specific language extensions are disabled.");
        }
    }
 
Example 19
Source Project: tutorials   File: JavaPythonInteropUnitTest.java    License: MIT License 5 votes vote down vote up
@Test
public void givenPythonScriptEngineIsAvailable_whenScriptInvoked_thenOutputDisplayed() throws Exception {
    StringWriter output = new StringWriter();
    ScriptContext context = new SimpleScriptContext();
    context.setWriter(output);

    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("python");
    engine.eval(new FileReader(resolvePythonScriptPath("hello.py")), context);
    assertEquals("Should contain script output: ", "Hello Baeldung Readers!!", output.toString()
        .trim());
}
 
Example 20
Source Project: neoscada   File: ConsoleContext.java    License: Eclipse Public License 1.0 4 votes vote down vote up
public void applyTo ( final ScriptContext scriptContext )
{
    scriptContext.setWriter ( new PrintWriter ( new OutputStreamWriter ( this.writerStream ) ) );
    scriptContext.setErrorWriter ( this.errorPrintWriter );
}