Examples with Invocable javax.script.Invocable used on opensource projects

Example 26 with Invocable

use of javax.script.Invocable in project jgnash by ccavanaugh.

the class ImportFilter method getDescription.

public String getDescription() {
    try {
        final Invocable invocable = (Invocable) scriptEngine;
        final Object result = invocable.invokeFunction("getDescription", Locale.getDefault());
        return result.toString();
    } catch (final ScriptException | NoSuchMethodException e) {
        logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
    }
    return "";
}

Example 27 with Invocable

use of javax.script.Invocable in project groovy by apache.

the class JSR223SpecTest method testInvocableFunction.

@Test
public void testInvocableFunction() throws ScriptException, NoSuchMethodException {
    // tag::jsr223_invocable[]
    ScriptEngineManager factory = new ScriptEngineManager();
    ScriptEngine engine = factory.getEngineByName("groovy");
    String fact = "def factorial(n) { n == 1 ? 1 : n * factorial(n - 1) }";
    engine.eval(fact);
    Invocable inv = (Invocable) engine;
    Object[] params = { 5 };
    Object result = inv.invokeFunction("factorial", params);
    assertEquals(Integer.valueOf(120), result);
// end::jsr223_invocable[]
}

Example 28 with Invocable

use of javax.script.Invocable in project hutool by looly.

the class ScriptUtil method evalInvocable.

/**
 * 执行Javascript脚本，返回Invocable，此方法分为两种情况：
 *
 * <ol>
 *     <li>执行的脚本返回值是可执行的脚本方法</li>
 *     <li>脚本为函数库，则ScriptEngine本身为可执行方法</li>
 * </ol>
 *
 * @param script 脚本内容
 * @return 执行结果
 * @throws ScriptRuntimeException 脚本异常
 * @since 5.3.6
 */
public static Invocable evalInvocable(String script) throws ScriptRuntimeException {
    final ScriptEngine jsEngine = getJsEngine();
    final Object eval;
    try {
        eval = jsEngine.eval(script);
    } catch (ScriptException e) {
        throw new ScriptRuntimeException(e);
    }
    if (eval instanceof Invocable) {
        return (Invocable) eval;
    } else if (jsEngine instanceof Invocable) {
        return (Invocable) jsEngine;
    }
    throw new ScriptRuntimeException("Script is not invocable !");
}

Example 29 with Invocable

use of javax.script.Invocable in project hutool by looly.

the class NashornDeepTest method main.

public static void main(String[] args) throws ScriptException, NoSuchMethodException {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
    engine.eval(ResourceUtil.readUtf8Str("filter1.js"));
    final Object filter1 = ((Invocable) engine).invokeFunction("filter1", 1, 2);
    Assert.assertFalse((Boolean) filter1);
}

Example 30 with Invocable

use of javax.script.Invocable in project proxyee-down by monkeyWie.

the class ExtensionUtil method invoke.

/**
 * 运行一个js方法
 */
public static Object invoke(ExtensionInfo extensionInfo, Event event, Object param, boolean async) throws NoSuchMethodException, ScriptException, FileNotFoundException, InterruptedException {
    // 初始化js引擎
    ScriptEngine engine = ExtensionUtil.buildExtensionRuntimeEngine(extensionInfo);
    Invocable invocable = (Invocable) engine;
    // 执行resolve方法
    Object result = invocable.invokeFunction(StringUtils.isEmpty(event.getMethod()) ? event.getOn() : event.getMethod(), param);
    // 结果为null或者异步调用直接返回
    if (result == null || async) {
        return result;
    }
    final Object[] ret = { null };
    // 判断是不是返回Promise对象
    ScriptContext ctx = new SimpleScriptContext();
    ctx.setAttribute("result", result, ScriptContext.ENGINE_SCOPE);
    boolean isPromise = (boolean) engine.eval("!!result&&typeof result=='object'&&typeof result.then=='function'", ctx);
    if (isPromise) {
        // 如果是返回的Promise则等待执行完成
        CountDownLatch countDownLatch = new CountDownLatch(1);
        invocable.invokeMethod(result, "then", (Function) o -> {
            try {
                ret[0] = o;
            } catch (Exception e) {
                LOGGER.error("An exception occurred while resolve()", e);
            } finally {
                countDownLatch.countDown();
            }
            return null;
        });
        invocable.invokeMethod(result, "catch", (Function) o -> {
            countDownLatch.countDown();
            return null;
        });
        // 等待解析完成
        countDownLatch.await();
    } else {
        ret[0] = result;
    }
    return ret[0];
}