Example usage for javax.script ScriptEngine eval

Introduction

In this page you can find the example usage for javax.script ScriptEngine eval.

Prototype

public Object eval(Reader reader) throws ScriptException;

Source Link

Document

Same as eval(String) except that the source of the script is provided as a Reader

Usage

From source file:org.eclairjs.nashorn.sql.JSUDF6.java

@SuppressWarnings({ "null", "unchecked" })
@Override//  w  w  w  . j  a  v a 2s.co m
public Object call(Object o, Object o2, Object o3, Object o4, Object o5, Object o6) throws Exception {
    ScriptEngine e = NashornEngineSingleton.getEngine();
    if (this.fn == null) {
        this.fn = e.eval(func);
        if (this.args != null && this.args.length > 0) {
            this.argsJS = new Object[this.args.length];
            for (int i = 0; i < this.args.length; i++)
                this.argsJS[i] = Utils.javaToJs(this.args[i], e);
        }

    }
    Invocable invocable = (Invocable) e;

    Object params[] = { o, o2, o3, o4, o5, o6 };

    if (this.args != null && this.args.length > 0) {
        params = ArrayUtils.addAll(params, this.args);
    }

    for (int i = 0; i < params.length; i++)
        params[i] = Utils.javaToJs(params[i], e);

    //        Object ret = invocable.invokeFunction("myTestFunc", params);

    Object ret = ((ScriptObjectMirror) this.fn).call(null, params);
    //        Object ret = invocable.invokeFunction("Utils_invoke", params);
    //ret = Utils.jsToJava(ret);
    ret = this.castValueToReturnType(ret);
    return ret;

}

---

From source file:temp.groovy.java

@Test
public void foo() {
    JexlEngine eng = new JexlEngine();
    eng.setLenient(false);//from www. ja  va 2s. c om
    eng.setSilent(false);
    Expression expr = eng.createExpression("a == '9' and a =~ ['7','9']");
    System.out.println(expr.dump());
    JexlContext ctx = new MapContext();
    ctx.set("a", "9");
    Boolean result = (Boolean) expr.evaluate(ctx);
    try {
        ScriptEngineManager factory = new ScriptEngineManager();
        ScriptEngine engine = factory.getEngineByName("jython");

        engine.put("first", 9);
        result = (Boolean) engine.eval("first not in [7,9]");
        result = (Boolean) engine.eval("first in ['7','9']");
        assertEquals(true, result);
        //This next example illustrates calling an invokable function:

        String fact = "def factorial(n) { n == 1 ? 1 : n * factorial(n - 1) }";
        engine.eval(fact);
        Invocable inv = (Invocable) engine;
        Object[] params = { 5 };
        Object oresult = inv.invokeFunction("factorial", params);
        assertEquals(120, oresult);
    } catch (ScriptException | NoSuchMethodException ex) {
        Logger.getLogger(groovy.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:org.siphon.common.js.JsEngineUtil.java

/**
 * /*from   w  w  w .  java 2 s. co  m*/
 * @param jsEngine
 * @param libs [path, path, ...]
 */
public static void initEngine(ScriptEngine jsEngine, Object[] libs) {
    try {
        jsEngine.put("engine", jsEngine);
        NashornScriptEngine nashornScriptEngine = (NashornScriptEngine) jsEngine;
        JsTypeUtil jsTypeUtil = new JsTypeUtil(jsEngine);
        ScriptObjectMirror importedFiles = jsTypeUtil.newObject();
        jsEngine.put("IMPORTED_FILES", importedFiles);

        ScriptObjectMirror stk = jsTypeUtil.newArray();
        jsEngine.put("IMPORTS_PATH_STACK", stk);

        ScriptObjectMirror defaults = (libs.length > 0 && libs[0] != null && libs[0] instanceof String
                && ((String) libs[0]).length() > 0) ? jsTypeUtil.newArray(libs) : jsTypeUtil.newArray();
        jsEngine.put("DEFAULT_IMPORTS_PATHS", defaults);

        jsEngine.put(ScriptEngine.FILENAME, "common/engine.js");
        jsEngine.eval(importsFn);
    } catch (ScriptException e) {
        e.printStackTrace();
    }
}

---

From source file:org.myperl.MathService.java

@POST
@Path("/")
@Produces(MediaType.APPLICATION_JSON)/*  w ww  .ja  v  a2s  .  c  o m*/
@Consumes(MediaType.APPLICATION_JSON)
public String post(String payload) throws ScriptException, ParseException {
    JSONParser jsonParser = new JSONParser();
    JSONObject jsonObject = (JSONObject) jsonParser.parse(payload);
    String expression = (String) jsonObject.get("exper");
    ScriptEngine engine = manager.getEngineByName("nashorn");
    JSONObject result = new JSONObject();
    result.put("result", engine.eval(expression).toString());
    return result.toString();
}

---

From source file:com.asual.lesscss.compiler.NashornCompiler.java

public NashornCompiler(LessOptions options, ResourceLoader loader, URL less, URL env, URL engine, URL cssmin,
        URL sourceMap) throws IOException {
    ScriptEngineManager factory = new ScriptEngineManager();
    ScriptEngine scriptEngine = factory.getEngineByName("nashorn");
    try {//from  ww  w .java 2 s .c  o m
        scriptEngine.eval(new InputStreamReader(sourceMap.openConnection().getInputStream()));
        scriptEngine.eval(new InputStreamReader(env.openConnection().getInputStream()));
        ScriptObjectMirror lessenv = (ScriptObjectMirror) scriptEngine.get("lessenv");
        lessenv.put("charset", options.getCharset());
        lessenv.put("css", options.isCss());
        lessenv.put("lineNumbers", options.getLineNumbers());
        lessenv.put("optimization", options.getOptimization());
        lessenv.put("sourceMap", options.isSourceMap());
        lessenv.put("sourceMapRootpath", options.getSourceMapRootpath());
        lessenv.put("sourceMapBasepath", options.getSourceMapBasepath());
        lessenv.put("sourceMapURL", options.getSourceMapUrl());
        lessenv.put("loader", loader);
        lessenv.put("paths", options.getPaths());
        scriptEngine.eval(new InputStreamReader(less.openConnection().getInputStream()));
        scriptEngine.eval(new InputStreamReader(cssmin.openConnection().getInputStream()));
        scriptEngine.eval(new InputStreamReader(engine.openConnection().getInputStream()));
        compile = (ScriptObjectMirror) scriptEngine.get("compile");
    } catch (ScriptException e) {
        logger.error(e.getMessage(), e);
    }
}

---

From source file:org.eclairjs.nashorn.JSComparator.java

@SuppressWarnings({ "null", "unchecked" })
@Override/* w ww.ja v a  2  s  .c  o  m*/
public boolean equals(Object o) {
    boolean ret = false;

    try {

        ScriptEngine e = NashornEngineSingleton.getEngine();
        if (this.fn == null) {
            this.fn = e.eval(func);
        }
        Invocable invocable = (Invocable) e;

        Object params[] = { this.fn, o };

        if (this.args != null && this.args.length > 0) {
            params = ArrayUtils.addAll(params, this.args);
        }

        ret = Boolean.valueOf(invocable.invokeFunction(this.functionName, params).toString());
    } catch (Exception exc) {
        // do nothing for now
    }

    return ret;
}

---

From source file:org.callimachusproject.fluid.consumers.HttpJavaScriptResponseWriter.java

public HttpJavaScriptResponseWriter() throws ScriptException {
    String systemId = getSystemId("SCRIPT");
    ScriptEngineManager man = new ScriptEngineManager();
    ScriptEngine engine = man.getEngineByName("rhino");
    engine.put(ScriptEngine.FILENAME, systemId);
    engine.eval(SCRIPT);
    this.engine = (Invocable) engine;
    this.delegate = new HttpMessageWriter();
}

---

From source file:org.jumpmind.metl.core.runtime.component.ModelAttributeScriptHelper.java

public static Object eval(Message message, ComponentContext context, ModelAttribute attribute, Object value,
        ModelEntity entity, EntityData data, String expression) {
    ScriptEngine engine = scriptEngine.get();
    if (engine == null) {
        ScriptEngineManager factory = new ScriptEngineManager();
        engine = factory.getEngineByName("groovy");
        scriptEngine.set(engine);/* www.  ja  va 2 s .c om*/
    }
    engine.put("value", value);
    engine.put("data", data);
    engine.put("entity", entity);
    engine.put("attribute", attribute);
    engine.put("message", message);
    engine.put("context", context);

    try {
        String importString = "import org.jumpmind.metl.core.runtime.component.ModelAttributeScriptHelper;\n";
        String code = String.format(
                "return new ModelAttributeScriptHelper(message, context, attribute, entity, data, value) { public Object eval() { return %s } }.eval()",
                expression);
        return engine.eval(importString + code);
    } catch (ScriptException e) {
        throw new RuntimeException("Unable to evaluate groovy script.  Attribute ==> " + attribute.getName()
                + ".  Value ==> " + value.toString() + "." + e.getCause().getMessage(), e);
    }
}

---

From source file:net.landora.video.filerenaming.RenameScriptManager.java

RenamingScript createRenamingScript(String folderScript, String fileScript, boolean reportExceptions) {
    try {/*from   w ww  . j a  va 2 s .c  o  m*/
        StringBuilder str = new StringBuilder();

        str.append(getClassScript("RenameScript.py"));
        str.append("\n");
        str.append(createScript("findFolderName", folderScript));
        str.append("\n");
        str.append(createScript("findFilename", fileScript));

        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("jython");

        engine.eval(str.toString());

        Invocable inv = (Invocable) engine;
        return inv.getInterface(RenamingScript.class);
    } catch (Exception ex) {
        if (reportExceptions) {
            LoggerFactory.getLogger(getClass()).error("Error getting rename script.", ex);
        }
        return null;
    }
}

---

From source file:org.eclairjs.nashorn.JSBaseFunction.java

@SuppressWarnings({ "null", "unchecked" })
protected Object callScript(Object params[]) throws Exception {
    ScriptEngine e = NashornEngineSingleton.getEngine();
    if (this.fn == null) {
        this.fn = e.eval(func);
        if (this.args != null && this.args.length > 0) {
            this.argsJS = new Object[this.args.length];
            for (int i = 0; i < this.args.length; i++)
                this.argsJS[i] = Utils.javaToJs(this.args[i], e);
        }/* w  ww  .j a  va 2s  .  com*/

    }
    Invocable invocable = (Invocable) e;

    if (this.args != null && this.args.length > 0) {
        params = ArrayUtils.addAll(params, this.args);
    }

    for (int i = 0; i < params.length; i++)
        params[i] = Utils.javaToJs(params[i], e);

    Object ret = ((ScriptObjectMirror) this.fn).call(null, params);
    ret = Utils.jsToJava(ret);
    return ret;
}

---

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