Java Code Examples for javax.script.ScriptEngine#get()

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String. This code defines a script object 'obj'
    // with one method called 'hello'.
    final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
    // evaluate script
    engine.eval(script);

    // javax.script.Invocable is an optional interface.
    // Check whether your script engine implements or not!
    // Note that the JavaScript engine implements Invocable interface.
    final Invocable inv = (Invocable) engine;

    // get script object on which we want to call the method
    final Object obj = engine.get("obj");

    // invoke the method named "hello" on the script object "obj"
    inv.invokeMethod(obj, "hello", "Script Method !!" );
}
 

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String
    final String script = "var obj = new Object(); obj.run = function() { print('run method called'); }";

    // evaluate script
    engine.eval(script);

    // get script object on which we want to implement the interface with
    final Object obj = engine.get("obj");

    final Invocable inv = (Invocable) engine;

    // get Runnable interface object from engine. This interface methods
    // are implemented by script methods of object 'obj'
    final Runnable r = inv.getInterface(obj, Runnable.class);

    // start a new thread that runs the script implemented
    // runnable interface
    final Thread th = new Thread(r);
    th.start();
    th.join();
}
 

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String
    final String script = "var obj = new Object(); obj.run = function() { print('run method called'); }";

    // evaluate script
    engine.eval(script);

    // get script object on which we want to implement the interface with
    final Object obj = engine.get("obj");

    final Invocable inv = (Invocable) engine;

    // get Runnable interface object from engine. This interface methods
    // are implemented by script methods of object 'obj'
    final Runnable r = inv.getInterface(obj, Runnable.class);

    // start a new thread that runs the script implemented
    // runnable interface
    final Thread th = new Thread(r);
    th.start();
    th.join();
}
 

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String. This code defines a script object 'obj'
    // with one method called 'hello'.
    final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
    // evaluate script
    engine.eval(script);

    // javax.script.Invocable is an optional interface.
    // Check whether your script engine implements or not!
    // Note that the JavaScript engine implements Invocable interface.
    final Invocable inv = (Invocable) engine;

    // get script object on which we want to call the method
    final Object obj = engine.get("obj");

    // invoke the method named "hello" on the script object "obj"
    inv.invokeMethod(obj, "hello", "Script Method !!" );
}
 

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String
    final String script = "var obj = new Object(); obj.run = function() { print('run method called'); }";

    // evaluate script
    engine.eval(script);

    // get script object on which we want to implement the interface with
    final Object obj = engine.get("obj");

    final Invocable inv = (Invocable) engine;

    // get Runnable interface object from engine. This interface methods
    // are implemented by script methods of object 'obj'
    final Runnable r = inv.getInterface(obj, Runnable.class);

    // start a new thread that runs the script implemented
    // runnable interface
    final Thread th = new Thread(r);
    th.start();
    th.join();
}
 

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String. This code defines a script object 'obj'
    // with one method called 'hello'.
    final String script = "var obj = new Object(); obj.hello = function(name) { print('Hello, ' + name); }";
    // evaluate script
    engine.eval(script);

    // javax.script.Invocable is an optional interface.
    // Check whether your script engine implements or not!
    // Note that the JavaScript engine implements Invocable interface.
    final Invocable inv = (Invocable) engine;

    // get script object on which we want to call the method
    final Object obj = engine.get("obj");

    // invoke the method named "hello" on the script object "obj"
    inv.invokeMethod(obj, "hello", "Script Method !!" );
}
 

public static void main(String[] args) throws Exception {
    System.out.println("\nTest8\n");
    ScriptEngineManager m = new ScriptEngineManager();
    ScriptEngine e  = Helper.getJsEngine(m);
    if (e == null) {
        System.out.println("Warning: No js engine found; test vacuously passes.");
        return;
    }
    e.eval(new FileReader(
        new File(System.getProperty("test.src", "."), "Test8.js")));
    Invocable inv = (Invocable)e;
    inv.invokeFunction("main", "Mustang");
    // use method of a specific script object
    Object scriptObj = e.get("scriptObj");
    inv.invokeMethod(scriptObj, "main", "Mustang");
}
 

public String evaluateJavaScript(Reader fileReader)
{
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("JavaScript");
    try
    {
        engine.eval(new InputStreamReader(getClass().getClassLoader().getResourceAsStream("json2.js")));
        engine.eval(new InputStreamReader(getClass().getClassLoader().getResourceAsStream("test-utils.js")));
        engine.eval(fileReader);
        engine.eval("jsonString = JSON.stringify(" + TEST_CONFIG_VARIABLE_NAME + ")");
    }
    catch (ScriptException e)
    {
        throw new DistributedTestException("Exception while evaluating test config", e);
    }
    String result = (String) engine.get("jsonString");

    return result;
}
 

public static void main(final String[] args) throws Exception {
    final ScriptEngineManager manager = new ScriptEngineManager();
    final ScriptEngine engine = manager.getEngineByName("nashorn");

    // JavaScript code in a String
    final String script = "var obj = new Object(); obj.run = function() { print('run method called'); }";

    // evaluate script
    engine.eval(script);

    // get script object on which we want to implement the interface with
    final Object obj = engine.get("obj");

    final Invocable inv = (Invocable) engine;

    // get Runnable interface object from engine. This interface methods
    // are implemented by script methods of object 'obj'
    final Runnable r = inv.getInterface(obj, Runnable.class);

    // start a new thread that runs the script implemented
    // runnable interface
    final Thread th = new Thread(r);
    th.start();
    th.join();
}
 

public static void main(String[] args) throws Exception {
    System.out.println("\nTest7\n");
    File file =
        new File(System.getProperty("test.src", "."), "Test7.js");
    Reader r = new FileReader(file);
    ScriptEngineManager m = new ScriptEngineManager();
    ScriptEngine eng = Helper.getJsEngine(m);
    if (eng == null) {
        System.out.println("Warning: No js engine found; test vacuously passes.");
        return;
    }
    eng.put("filename", file.getAbsolutePath());
    eng.eval(r);
    String str = (String)eng.get("firstLine");
    // do not change first line in Test7.js -- we check it here!
    if (!str.equals("//this is the first line of Test7.js")) {
        throw new RuntimeException("unexpected first line");
    }
}
 

@Test
public void invokeMethodTest() {
    final ScriptEngineManager m = new ScriptEngineManager();
    final ScriptEngine e = m.getEngineByName("nashorn");

    try {
        e.eval("var Example = function() { this.hello = function() { return 'Hello World!'; };}; myExample = new Example();");
        final Object obj = e.get("myExample");
        final Object res = ((Invocable) e).invokeMethod(obj, "hello");
        assertEquals(res, "Hello World!");
    } catch (final Exception exp) {
        exp.printStackTrace();
        fail(exp.getMessage());
    }
}
 

@Test
public void invokeMethodTest() {
    final ScriptEngineManager m = new ScriptEngineManager();
    final ScriptEngine e = m.getEngineByName("nashorn");

    try {
        e.eval("var Example = function() { this.hello = function() { return 'Hello World!'; };}; myExample = new Example();");
        final Object obj = e.get("myExample");
        final Object res = ((Invocable) e).invokeMethod(obj, "hello");
        assertEquals(res, "Hello World!");
    } catch (final Exception exp) {
        exp.printStackTrace();
        fail(exp.getMessage());
    }
}
 

/**
     * 渲染模板
     *
     * @param templateContent
     * @param paramMap
     *
     * @return
     */
    public static String render(String templateContent, Map<String, Object> paramMap) throws ScriptException {
        ScriptEngineManager manager = new ScriptEngineManager();
        // 建立javascript脚本引擎
        ScriptEngine engine = manager.getEngineByName("javascript");
        // 将变量和变量值传给javascript脚本
        for (String key : paramMap.keySet()) {
            engine.put(key, paramMap.get(key));
        }

        // 开始执行脚本
        engine.eval(templateContent);

        // 编译执行，执行单个函数
//			if (engine instanceof Compilable){
//				Compilable compEngine = (Compilable)engine;
//				compEngine.compile(templateContent);
//			}

        // 执行多个函数
//			if (engine instanceof Invocable){
//				engine.eval(templateContent);
//				Invocable invokeEngine = (Invocable)engine;
//				Object o = invokeEngine.invokeFunction("funcName", "funcParam1", "funcParam2");
//			}

        // 异步调用
//			Invocable invokeEngine = (Invocable)engine;
//			Runnable runner = invokeEngine.getInterface(Runnable.class);
//			Thread t = new Thread(runner);
//			t.start();
//			t.join();

//		} catch (NoSuchMethodException e) {
//			log.error("执行脚本异常");
//		}

        // 取js变量值
        return (String) engine.get("output");
    }
 

@Test
public void invokeMethodTest() {
    final ScriptEngineManager m = new ScriptEngineManager();
    final ScriptEngine e = m.getEngineByName("nashorn");

    try {
        e.eval("var Example = function() { this.hello = function() { return 'Hello World!'; };}; myExample = new Example();");
        final Object obj = e.get("myExample");
        final Object res = ((Invocable) e).invokeMethod(obj, "hello");
        assertEquals(res, "Hello World!");
    } catch (final Exception exp) {
        exp.printStackTrace();
        fail(exp.getMessage());
    }
}
 

@Test
public void invokeMethodTest() {
    final ScriptEngineManager m = new ScriptEngineManager();
    final ScriptEngine e = m.getEngineByName("nashorn");

    try {
        e.eval("var Example = function() { this.hello = function() { return 'Hello World!'; };}; myExample = new Example();");
        final Object obj = e.get("myExample");
        final Object res = ((Invocable) e).invokeMethod(obj, "hello");
        assertEquals(res, "Hello World!");
    } catch (final Exception exp) {
        exp.printStackTrace();
        fail(exp.getMessage());
    }
}
 

private static String prettify(ScriptEngine engine, String src) {
  try {
    Object w = engine.get("window");
    return (String) ((Invocable) engine).invokeMethod(w, "prettyPrintOne", src);
  } catch (ScriptException | NoSuchMethodException ex) {
    ex.printStackTrace();
    return "";
  }
}
 

String getResponse(String treeId, int treenum, String eid){
	String result = "";
	try{
		String fttps = ConfigContext.getRequest(ConfigContext.getProp("RSPFTTPJS"));
		//System.out.println(fttps);
		ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
		
		String[] fttproot=null,fttprootcode=null;
		FileProperty[] fttpchild = null;
		if(treenum==0){
			fttproot = FttpAdapter.fttpRoots();
			//for(int i=0;i<fttproot.length;i++)System.out.println("fttproot:"+fttproot[i]);
			fttprootcode = FttpAdapter.fttpRootsPathEncode(fttproot);
		}else if(treenum>0){
			//System.out.println("getResponse treeId................"+treeId);
			FttpAdapter fa = new FttpAdapter(treeId);//ObjectBytes.getViewUtf8UrlString(treeId)getViewUrlStringdecodeReplace"fttp://localhost"
			//rootlist = fa.listRoots();
			fttpchild = fa.getChildProperty();
			/*System.out.println("getResponse fttpchild................"+fttpchild);
			if(fttpchild!=null)
				System.out.println("getResponse fttpchild length................"+fttpchild.length);*/
		}
		
		engine.put("$treenum", treenum);
		engine.put("$fttproot", fttproot);
		engine.put("$fttprootcode", fttprootcode);
		engine.put("$fttpchild", fttpchild);
		//if(engine instanceof Invocable){
		
		if(engine instanceof Compilable){
			Compilable ce = (Compilable)engine;
			ce.compile(fttps).eval();
		}
		//System.out.println(o);
		result = (String)engine.get("result");
		//result = new String(result.getBytes("iso-8859-1"),"utf-8");
		//System.out.println("result:"+result);
	}catch(Exception e){
		//System.out.println(e);
		 LogUtil.info("[getResponse]", "[HandlerAuth]", e);
	}
	return "<script>parent."+eid+".innerHTML=\""+result+"\";</script>";
}
 

@Test
public void jsobjectTest() {
    final ScriptEngineManager m = new ScriptEngineManager();
    final ScriptEngine e = m.getEngineByName("nashorn");
    try {
        e.eval("var obj = { '1': 'world', func: function() { return this.bar; }, bar: 'hello' }");
        final ScriptObjectMirror obj = (ScriptObjectMirror) e.get("obj");

        // try basic get on existing properties
        if (!obj.getMember("bar").equals("hello")) {
            fail("obj.bar != 'hello'");
        }

        if (!obj.getSlot(1).equals("world")) {
            fail("obj[1] != 'world'");
        }

        if (!obj.callMember("func", new Object[0]).equals("hello")) {
            fail("obj.func() != 'hello'");
        }

        // try setting properties
        obj.setMember("bar", "new-bar");
        obj.setSlot(1, "new-element-1");
        if (!obj.getMember("bar").equals("new-bar")) {
            fail("obj.bar != 'new-bar'");
        }

        if (!obj.getSlot(1).equals("new-element-1")) {
            fail("obj[1] != 'new-element-1'");
        }

        // try adding properties
        obj.setMember("prop", "prop-value");
        obj.setSlot(12, "element-12");
        if (!obj.getMember("prop").equals("prop-value")) {
            fail("obj.prop != 'prop-value'");
        }

        if (!obj.getSlot(12).equals("element-12")) {
            fail("obj[12] != 'element-12'");
        }

        // delete properties
        obj.removeMember("prop");
        if ("prop-value".equals(obj.getMember("prop"))) {
            fail("obj.prop is not deleted!");
        }

        // Simple eval tests
        assertEquals(obj.eval("typeof Object"), "function");
        assertEquals(obj.eval("'nashorn'.substring(3)"), "horn");
    } catch (final Exception exp) {
        exp.printStackTrace();
        fail(exp.getMessage());
    }
}
 

@Override
public String compile(String filename, SourceFactory sourceFactory) throws IOException {
  ScriptEngine e = getEngine();
  ScriptObjectMirror o = (ScriptObjectMirror)e.get("compileTypescript");
  return (String)o.call(null, filename, sourceFactory);
}
 

protected void compile(ScriptEngine engine) throws ScriptException {
    if (engine.get(this.name) == null) {
        engine.eval("var " + this.name + " = function(hologram, player) {\n" + this.code + "\n}");
    }
}