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

Example 86 with ScriptContext

use of javax.script.ScriptContext in project sling by apache.

the class ScriptEngineHelper method eval.

public Object eval(String javascriptCode, Map<String, Object> data, final StringWriter sw) throws ScriptException {
    final PrintWriter pw = new PrintWriter(sw, true);
    ScriptContext ctx = new SimpleScriptContext();
    final Bindings b = new SimpleBindings();
    b.put("out", pw);
    if (data != null) {
        for (Map.Entry<String, Object> e : data.entrySet()) {
            b.put(e.getKey(), e.getValue());
        }
    }
    ctx.setBindings(b, ScriptContext.ENGINE_SCOPE);
    ctx.setWriter(sw);
    ctx.setErrorWriter(new OutputStreamWriter(System.err));
    Object result = getEngine().eval(javascriptCode, ctx);
    if (result instanceof Wrapper) {
        result = ((Wrapper) result).unwrap();
    }
    if (result instanceof ScriptableObject) {
        Context.enter();
        try {
            result = ((ScriptableObject) result).getDefaultValue(null);
        } finally {
            Context.exit();
        }
    }
    return result;
}

Example 87 with ScriptContext

use of javax.script.ScriptContext in project camel by apache.

the class ScriptBuilder method tryCreateScriptEngine.

/**
     * Attemps to create the script engine for the given langauge using the classloader
     *
     * @return the engine, or <tt>null</tt> if not able to create
     */
private static ScriptEngine tryCreateScriptEngine(String language, ClassLoader classLoader) {
    ScriptEngineManager manager = new ScriptEngineManager(classLoader);
    ScriptEngine engine = null;
    // some script names has alias
    String[] names = getScriptNames(language);
    for (String name : names) {
        try {
            engine = manager.getEngineByName(name);
            if (engine != null) {
                break;
            }
        } catch (NoClassDefFoundError ex) {
            LOG.warn("Cannot load ScriptEngine for " + name + ". Please ensure correct JARs is provided on classpath (stacktrace in DEBUG logging).");
            // include stacktrace in debug logging
            LOG.debug("Cannot load ScriptEngine for " + name + ". Please ensure correct JARs is provided on classpath.", ex);
        }
    }
    if (engine == null) {
        engine = checkForOSGiEngine(language);
    }
    if (engine != null && isPython(language)) {
        ScriptContext context = engine.getContext();
        context.setAttribute("com.sun.script.jython.comp.mode", "eval", ScriptContext.ENGINE_SCOPE);
    }
    return engine;
}

Example 88 with ScriptContext

use of javax.script.ScriptContext in project camel by apache.

the class ScriptBuilder method populateBindings.

protected ScriptContext populateBindings(ScriptEngine engine, Exchange exchange, Map<String, Object> attributes) {
    ScriptContext context = engine.getContext();
    int scope = ScriptContext.ENGINE_SCOPE;
    context.setAttribute("context", exchange.getContext(), scope);
    context.setAttribute("camelContext", exchange.getContext(), scope);
    context.setAttribute("exchange", exchange, scope);
    Message in = exchange.getIn();
    context.setAttribute("request", in, scope);
    context.setAttribute("headers", in.getHeaders(), scope);
    context.setAttribute("body", in.getBody(), scope);
    if (exchange.hasOut()) {
        Message out = exchange.getOut();
        context.setAttribute("out", out, scope);
        context.setAttribute("response", out, scope);
    }
    // to make using properties component easier
    context.setAttribute("properties", new ScriptPropertiesFunction(exchange.getContext()), scope);
    // any additional attributes
    if (attributes != null) {
        for (Map.Entry<String, Object> entry : attributes.entrySet()) {
            context.setAttribute(entry.getKey(), entry.getValue(), scope);
        }
    }
    return context;
}

Example 89 with ScriptContext

use of javax.script.ScriptContext in project camel by apache.

the class ScriptBuilder method doEvaluateScript.

protected Object doEvaluateScript(Exchange exchange, ScriptEngine scriptEngine) throws ScriptException, IOException {
    ScriptContext context = populateBindings(scriptEngine, exchange, attributes);
    addScriptEngineArguments(scriptEngine, exchange);
    Object result = runScript(scriptEngine, exchange, context);
    LOG.debug("The script evaluation result is: {}", result);
    return result;
}

Example 90 with ScriptContext

use of javax.script.ScriptContext in project javautils by jiadongpo.

the class ExecJs method execJs.

/**
 * 后置处理，执行js脚本
 * js 就是要执行的js脚本，map 是参数，就允许js脚本中用动态的参数 处理map中的值
 *
 * @param js
 * @throws Exception
 */
public void execJs(String js, Map<String, Object> map) throws Exception {
    if (log.isDebugEnabled()) {
        log.debug("execJs js : " + js);
        Iterator<Entry<String, Object>> it = map.entrySet().iterator();
        while (it.hasNext()) {
            Entry<String, Object> entry = (Entry<String, Object>) it.next();
            log.info("EXECJS MAP : " + entry.getKey() + "---" + entry.getValue());
        }
    // end while
    }
    // end if
    if ("".equals(js) || js == null) {
        log.info("EXECJS ERROR : JAVASCRIPT CONTENT IS NULL");
    } else if (map == null || map.size() <= 0) {
        log.info("EXECJS ERROR : MAP CONTENT IS NULL");
    } else {
        // 获取脚本引擎
        ScriptEngineManager mgr = new ScriptEngineManager();
        ScriptEngine engine = mgr.getEngineByName("javascript");
        // 绑定数据
        ScriptContext newContext = new SimpleScriptContext();
        Bindings bind = newContext.getBindings(ScriptContext.ENGINE_SCOPE);
        bind.putAll(map);
        try {
            engine.setBindings(bind, ScriptContext.ENGINE_SCOPE);
            engine.eval(js);
        } catch (Exception e) {
            log.info("EXECJS EXCEPTION : EXECUTE JAVASCRIPT EXCEPTION", e);
            throw (e);
        }
    // end try
    }
// end if
}