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:com.t_oster.visicut.misc.Helper.java

public static Double evaluateExpression(String expr) {
    expr = expr.replace(",", ".");
    try {// www  .j a  v a  2 s  .  com
        ScriptEngineManager mgr = new ScriptEngineManager();
        ScriptEngine engine = mgr.getEngineByName("JavaScript");
        expr = engine.eval(expr).toString();
    } catch (Exception e) {
        //e.printStackTrace();
    }
    return Double.parseDouble(expr);
}

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From source file:org.netbeans.jcode.core.util.FileUtil.java

public static String expandTemplate(String template, Map<String, Object> values) {
    StringWriter writer = new StringWriter();
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    if (values != null) {
        bind.putAll(values);/*from w w  w  .j a  va2s.c o  m*/
    }
    bind.put(ENCODING_PROPERTY_NAME, Charset.defaultCharset().name());
    eng.getContext().setWriter(writer);
    Reader is = new StringReader(template);
    try {
        eng.eval(is);
    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }

    return writer.toString();

}

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From source file:io.github.jeddict.jcode.util.FileUtil.java

/**
 * In-memory template api//from   www.  j a v a 2s.c o  m
 *
 * @param templateContent
 * @param values
 * @return
 */
public static String expandTemplateContent(String templateContent, Map<String, Object> values) {
    StringWriter writer = new StringWriter();
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    if (values != null) {
        bind.putAll(values);
    }
    bind.put(ENCODING_PROPERTY_NAME, Charset.defaultCharset().name());
    eng.getContext().setWriter(writer);
    Reader is = new StringReader(templateContent);
    try {
        eng.eval(is);
    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }

    return writer.toString();
}

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From source file:io.github.jeddict.jcode.util.FileUtil.java

public static String expandTemplate(String inputTemplatePath, Map<String, Object> values) {
    InputStream contentStream = loadResource(inputTemplatePath);
    StringWriter writer = new StringWriter();
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    if (values != null) {
        bind.putAll(values);//from   ww  w.j a  va2  s.c o m
    }
    bind.put(ENCODING_PROPERTY_NAME, Charset.defaultCharset().name());
    eng.getContext().setWriter(writer);
    Reader is = new InputStreamReader(contentStream);
    try {
        eng.eval(is);
    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }

    return writer.toString();
}

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From source file:org.wso2.carbon.business.rules.core.util.TemplateManagerHelper.java

/**
 * Runs the script that is given as a string, and gives all the variables specified in the script
 *
 * @param script//from   w w w .jav  a2  s. c o m
 * @return Map of Strings
 * @throws TemplateManagerHelperException
 */
public static Map<String, String> getScriptGeneratedVariables(String script)
        throws RuleTemplateScriptException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    ScriptContext scriptContext = new SimpleScriptContext();
    scriptContext.setBindings(engine.createBindings(), ScriptContext.ENGINE_SCOPE);

    try {
        // Run script
        engine.eval(script);
        Map<String, Object> returnedScriptContextBindings = engine.getBindings(ScriptContext.ENGINE_SCOPE);

        // Variable names and their values as strings, from the script context binding
        Map<String, String> scriptVariables = new HashMap<>();
        for (Map.Entry scriptVariable : returnedScriptContextBindings.entrySet()) {
            if (scriptVariable.getValue() == null) {
                scriptVariables.put(scriptVariable.getKey().toString(), null);
            } else {
                scriptVariables.put(scriptVariable.getKey().toString(), scriptVariable.getValue().toString());
            }
        }
        return scriptVariables;
    } catch (ScriptException e) {
        throw new RuleTemplateScriptException(e.getCause().getMessage(), e);
    }
}

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From source file:tk.tomby.tedit.services.ScriptingManager.java

/**
 * DOCUMENT ME!/* w w w . java  2  s  . c om*/
 *
 * @param lang DOCUMENT ME!
 * @param script DOCUMENT ME!
 * @param buffer DOCUMENT ME!
 */
public static Object exec(String lang, InputStream stream, IBuffer buffer) {
    Object result = null;
    BufferedReader reader = null;

    try {
        ScriptEngine engine = manager.getEngineByName(lang);

        reader = new BufferedReader(new InputStreamReader(stream));

        if (buffer != null) {
            Bindings bindings = engine.createBindings();
            bindings.put("buffer", new BufferDecorator(buffer));
            engine.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
        }

        result = engine.eval(reader);

    } catch (ScriptException e) {
        log.error("error in script excution", e);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                log.warn("error closing reader", e);
            }
        }
    }

    return result;
}

---

From source file:org.omegat.gui.scripting.ScriptRunner.java

/**
 * Execute a script with a given engine and bindings.
 * /*from ww  w.j  a  v a  2  s .  com*/
 * @param script
 *            The script in string form
 * @param engine
 *            The engine
 * @param additionalBindings
 *            A map of bindings that will be included along with other
 *            bindings
 * @return The evaluation result
 * @throws ScriptException
 */
public static Object executeScript(String script, ScriptEngine engine, Map<String, Object> additionalBindings)
        throws ScriptException {
    // logResult(StaticUtils.format(OStrings.getString("SCW_SELECTED_LANGUAGE"),
    // engine.getFactory().getEngineName()));
    Bindings bindings = engine.createBindings();
    bindings.put(VAR_PROJECT, Core.getProject());
    bindings.put(VAR_EDITOR, Core.getEditor());
    bindings.put(VAR_GLOSSARY, Core.getGlossary());
    bindings.put(VAR_MAINWINDOW, Core.getMainWindow());
    bindings.put(VAR_CORE, Core.class);

    if (additionalBindings != null) {
        bindings.putAll(additionalBindings);
    }
    engine.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
    Object result = engine.eval(script);
    if (engine instanceof Invocable) {
        invokeGuiScript((Invocable) engine);
    }
    return result;
}

---

From source file:controllers.skilltag.SkillTagApp.java

@Transactional(readOnly = true)
public static Result list() {
    DynamicForm requestData = Form.form().bindFromRequest();
    String p = requestData.get("p") == null ? "1" : requestData.get("p");
    Long i = StringUtils.isBlank(requestData.get("i")) ? 2L : Long.parseLong(requestData.get("i"));
    String s = StringUtils.isBlank(requestData.get("s")) ? null : requestData.get("s");

    String cf = requestData.get("cf");
    String ssf = requestData.get("ssf");
    String ef = requestData.get("ef");
    String gf = requestData.get("gf");
    String o = requestData.get("o");
    String ot = requestData.get("ot");

    List<SkillTag> skillTags = SkillTag.getAll(i, 1, "all");

    List<TagListVo> ivs = new ArrayList<TagListVo>();
    List<TagListVo> svs = new ArrayList<TagListVo>();
    ScriptEngine engine = SemUtils.getEngine();
    try {/*from  ww w. j  av  a 2s . co m*/
        for (SkillTag st : skillTags) {
            TagListVo tv = new TagListVo();
            tv.setTagName(st.tagName);
            tv.setTagId(st.id);
            if (st.tagType != null && st.tagType.ordinal() == SkillTag.TagType.CATEGORY.ordinal()) {
                if (st.id.equals(i))
                    tv.setIsCurr(true);
                tv.setHref(controllers.skilltag.routes.SkillTagApp.list().url() + "?p=1&i=" + tv.getTagId());
                ivs.add(tv);
            } else {
                tv.setHref(controllers.skilltag.routes.SkillTagApp.list().url() + "?p=1&i=" + i + "&s="
                        + engine.eval("encodeURIComponent('" + tv.getTagName() + "')").toString());
                svs.add(tv);
            }
        }
        if (StringUtils.isNotBlank(s)) {
            TagListVo tv = new TagListVo();
            tv.setTagName(s);
            tv.setIsCurr(true);
            tv.setHref(controllers.skilltag.routes.SkillTagApp.list().url() + "?p=1&i=" + i + "&s="
                    + engine.eval("encodeURIComponent('" + tv.getTagName() + "')").toString());
            svs.add(0, tv);
        }
    } catch (ScriptException e) {
        e.printStackTrace();
    }
    List<ExpertListVO> elv = getTagExperts(p, i, s, cf, ssf, ef, gf, o, ot);
    SPage spage = new SPage(Integer.parseInt(p), i, s, cf, ssf, ef, gf, o, ot, ivs, svs, elv);
    List<String> countryList = SkillTag.getCountryNameWithCache();
    spage.setCountryList(countryList);

    return ok(views.html.skilltag.skilltagall.render(spage));
}

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From source file:io.apicurio.hub.core.js.OaiScriptEngineFactory.java

public static final ScriptEngine createScriptEngine(URL... jsUrls) throws Exception {
    logger.debug("Creating and initializing a Nashorn script engine.");
    long start = System.currentTimeMillis();
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    if (engine == null) {
        throw new Exception("Failed to create a Nashorn script engine!");
    }//from w  w w .  j a v a  2  s .  c om

    URL consoleJsUrl = OaiScriptEngineFactory.class.getClassLoader().getResource("js-lib/core-console.js");
    if (consoleJsUrl == null) {
        throw new Exception("Failed to load script: core-console.js");
    }
    URL oaiJsUrl = OaiScriptEngineFactory.class.getClassLoader().getResource("js-lib/OAI.umd.js");
    if (oaiJsUrl == null) {
        throw new Exception("Failed to load script: OAI.umd.js");
    }
    URL oaiCommandsJsUrl = OaiScriptEngineFactory.class.getClassLoader()
            .getResource("js-lib/OAI-commands.umd.js");
    if (oaiCommandsJsUrl == null) {
        throw new Exception("Failed to load script: OAI-commands.umd.js");
    }

    // Load the JS libraries into the engine
    engine.eval(IOUtils.toString(consoleJsUrl));
    engine.eval(IOUtils.toString(oaiJsUrl));
    engine.eval(IOUtils.toString(oaiCommandsJsUrl));
    for (URL jsUrl : jsUrls) {
        engine.eval(IOUtils.toString(jsUrl));
    }

    long end = System.currentTimeMillis();
    logger.debug("Initialized a Nashorn script engine in {} millis.", end - start);

    return engine;

}

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From source file:com.datatorrent.stram.client.StramClientUtils.java

public static void evalProperties(Properties target, Configuration vars) {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("javascript");

    Pattern substitutionPattern = Pattern.compile("\\$\\{(.+?)\\}");
    Pattern evalPattern = Pattern.compile("\\{% (.+?) %\\}");

    try {/*w  w w  . j  ava 2  s.  c o m*/
        engine.eval("var _prop = {}");
        for (Map.Entry<String, String> entry : vars) {
            String evalString = String.format("_prop[\"%s\"] = \"%s\"",
                    StringEscapeUtils.escapeJava(entry.getKey()),
                    StringEscapeUtils.escapeJava(entry.getValue()));
            engine.eval(evalString);
        }
    } catch (ScriptException ex) {
        LOG.warn("Javascript error: {}", ex.getMessage());
    }

    for (Map.Entry<Object, Object> entry : target.entrySet()) {
        String value = entry.getValue().toString();

        Matcher matcher = substitutionPattern.matcher(value);
        if (matcher.find()) {
            StringBuilder newValue = new StringBuilder();
            int cursor = 0;
            do {
                newValue.append(value.substring(cursor, matcher.start()));
                String subst = vars.get(matcher.group(1));
                if (subst != null) {
                    newValue.append(subst);
                }
                cursor = matcher.end();
            } while (matcher.find());
            newValue.append(value.substring(cursor));
            target.put(entry.getKey(), newValue.toString());
        }

        matcher = evalPattern.matcher(value);
        if (matcher.find()) {
            StringBuilder newValue = new StringBuilder();
            int cursor = 0;
            do {
                newValue.append(value.substring(cursor, matcher.start()));
                try {
                    Object result = engine.eval(matcher.group(1));
                    String eval = result.toString();

                    if (eval != null) {
                        newValue.append(eval);
                    }
                } catch (ScriptException ex) {
                    LOG.warn("JavaScript exception {}", ex.getMessage());
                }
                cursor = matcher.end();
            } while (matcher.find());
            newValue.append(value.substring(cursor));
            target.put(entry.getKey(), newValue.toString());
        }
    }
}

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