Example usage for javax.script ScriptEngine createBindings

Introduction

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

Prototype

public Bindings createBindings();

Source Link

Document

Returns an uninitialized Bindings.

Usage

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/* w  w w  .j a  v  a 2 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);
    }
}

From source file:org.wso2.carbon.identity.application.authentication.framework.config.model.graph.JsGraphBuilderFactory.java

public ScriptEngine createEngine(AuthenticationContext authenticationContext) {

    ScriptEngine engine = factory.getScriptEngine("--no-java");

    Bindings bindings = engine.createBindings();
    engine.setBindings(bindings, ScriptContext.GLOBAL_SCOPE);
    engine.setBindings(engine.createBindings(), ScriptContext.ENGINE_SCOPE);
    SelectAcrFromFunction selectAcrFromFunction = new SelectAcrFromFunction();
    //        todo move to functions registry
    bindings.put(FrameworkConstants.JSAttributes.JS_FUNC_SELECT_ACR_FROM,
            (SelectOneFunction) selectAcrFromFunction::evaluate);

    JsLogger jsLogger = new JsLogger();
    bindings.put(FrameworkConstants.JSAttributes.JS_LOG, jsLogger);
    return engine;
}

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

/**
 * DOCUMENT ME!/*  w w  w.  j av a  2 s. co  m*/
 *
 * @param lang DOCUMENT ME!
 * @param script DOCUMENT ME!
 * @param buffer DOCUMENT ME!
 *
 * @return DOCUMENT ME!
 */
public static Object eval(String lang, String script, IBuffer buffer) {
    Object result = null;

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

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

        result = engine.eval(script);
    } catch (ScriptException e) {
        log.error("error in script excution", e);
    }

    return result;
}

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

/**
 * DOCUMENT ME!// ww  w .java2  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;
}