Example usage for javax.script ScriptEngine getBindings

Introduction

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

Prototype

public Bindings getBindings(int scope);

Source Link

Document

Returns a scope of named values.

Usage

From source file:io.github.jeddict.jcode.parser.ejs.EJSParser.java

private ScriptEngine createEngine() {
    CompiledScript cscript;/*  www. j av a 2 s  .  c  om*/
    Bindings bindings;
    ScriptEngine scriptEngine = new NashornScriptEngineFactory().getScriptEngine("--language=es6");//engine = new ScriptEngineManager().getEngineByName("nashorn");
    try {
        try {
            if (base == null) {
                base = IOUtils.toString(EJSParser.class.getClassLoader()
                        .getResourceAsStream("io/github/jeddict/jcode/parser/ejs/resources/base.js"), "UTF-8");
            }
            if (ejs == null) {
                ejs = IOUtils.toString(EJSParser.class.getClassLoader()
                        .getResourceAsStream("io/github/jeddict/jcode/parser/ejs/resources/ejs.js"), "UTF-8");
            }
        } catch (IOException ex) {
            Exceptions.printStackTrace(ex);
        }

        scriptEngine.eval(base);
        Compilable compilingEngine = (Compilable) scriptEngine;
        cscript = compilingEngine.compile(ejs);
        bindings = scriptEngine.getBindings(ScriptContext.ENGINE_SCOPE);
        cscript.eval(bindings);
        scriptEngine.eval(scripts.toString());

        for (Map<String, Object> context : contexts) {
            context.keySet().stream().forEach((key) -> {
                try {
                    bindings.put(key, context.get(key));
                    if (context.get(key) instanceof Collection) {
                        scriptEngine.eval(String.format("%s = Java.from(%s);", key, key));
                    }
                } catch (ScriptException ex) {
                    Exceptions.printStackTrace(ex);
                }
            });
        }

    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }
    return scriptEngine;
}

From source file:org.nuxeo.ecm.core.io.download.DownloadServiceImpl.java

@Override
public boolean checkPermission(DocumentModel doc, String xpath, Blob blob, String reason,
        Map<String, Serializable> extendedInfos) {
    List<DownloadPermissionDescriptor> descriptors = registry.getDownloadPermissionDescriptors();
    if (descriptors.isEmpty()) {
        return true;
    }/*from   www  . j  a v a  2 s  .  c o  m*/
    xpath = fixXPath(xpath);
    Map<String, Object> context = new HashMap<>();
    Map<String, Serializable> ei = extendedInfos == null ? Collections.emptyMap() : extendedInfos;
    NuxeoPrincipal currentUser = ClientLoginModule.getCurrentPrincipal();
    context.put("Document", doc);
    context.put("XPath", xpath);
    context.put("Blob", blob);
    context.put("Reason", reason);
    context.put("Infos", ei);
    context.put("Rendition", ei.get("rendition"));
    context.put("CurrentUser", currentUser);
    for (DownloadPermissionDescriptor descriptor : descriptors) {
        ScriptEngine engine = scriptEngineManager.getEngineByName(descriptor.getScriptLanguage());
        if (engine == null) {
            throw new NuxeoException("Engine not found for language: " + descriptor.getScriptLanguage()
                    + " in permission: " + descriptor.getName());
        }
        if (!(engine instanceof Invocable)) {
            throw new NuxeoException("Engine " + engine.getClass().getName() + " not Invocable for language: "
                    + descriptor.getScriptLanguage() + " in permission: " + descriptor.getName());
        }
        Object result;
        try {
            engine.eval(descriptor.getScript());
            engine.getBindings(ScriptContext.ENGINE_SCOPE).putAll(context);
            result = ((Invocable) engine).invokeFunction(RUN_FUNCTION);
        } catch (NoSuchMethodException e) {
            throw new NuxeoException("Script does not contain function: " + RUN_FUNCTION + "() in permission: "
                    + descriptor.getName(), e);
        } catch (ScriptException e) {
            log.error("Failed to evaluate script: " + descriptor.getName(), e);
            continue;
        }
        if (!(result instanceof Boolean)) {
            log.error("Failed to get boolean result from permission: " + descriptor.getName() + " (" + result
                    + ")");
            continue;
        }
        boolean allow = ((Boolean) result).booleanValue();
        if (!allow) {
            return false;
        }
    }
    return true;
}