Example usage for javax.script ScriptEngineManager put

Introduction

In this page you can find the example usage for javax.script ScriptEngineManager put.

Prototype

public void put(String key, Object value) 

Source Link

Document

Sets the specified key/value pair in the Global Scope.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    manager.put("global", "global bindings");

    dumpBindings(manager.getBindings());
    ScriptEngine engine = manager.getEngineByExtension("js");
    engine.put("engine", "engine bindings");

    dumpBindings(engine.getBindings(ScriptContext.GLOBAL_SCOPE));

    dumpBindings(engine.getBindings(ScriptContext.ENGINE_SCOPE));

    Bindings bindings = engine.createBindings();
    bindings.put("engine", "overridden engine bindings");
    bindings.put("bindings", bindings);
    engine.eval("app.dumpBindings (bindings);", bindings);

    ScriptEngine engine2 = manager.getEngineByExtension("js");
    engine2.put("engine2", "engine2 bindings");

    dumpBindings(engine2.getBindings(ScriptContext.GLOBAL_SCOPE));
    dumpBindings(engine2.getBindings(ScriptContext.ENGINE_SCOPE));
    dumpBindings(engine.getBindings(ScriptContext.ENGINE_SCOPE));
}

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From source file:GetToKnowBindingsAndScopes.java

public static void main(String[] args) {
    ScriptEngineManager manager = new ScriptEngineManager();
    manager.put("global", "global bindings");

    dumpBindings(manager.getBindings());
    ScriptEngine engine = manager.getEngineByExtension("js");
    engine.put("engine", "engine bindings");

    dumpBindings(engine.getBindings(ScriptContext.GLOBAL_SCOPE));

    dumpBindings(engine.getBindings(ScriptContext.ENGINE_SCOPE));

    try {/* ww  w  .  j a  v  a2  s . c  o  m*/
        Bindings bindings = engine.createBindings();
        bindings.put("engine", "overridden engine bindings");
        bindings.put("app", new GetToKnowBindingsAndScopes());
        bindings.put("bindings", bindings);
        engine.eval("app.dumpBindings (bindings);", bindings);
    } catch (ScriptException se) {
        System.err.println(se.getMessage());
    }

    ScriptEngine engine2 = manager.getEngineByExtension("js");
    engine2.put("engine2", "engine2 bindings");

    dumpBindings(engine2.getBindings(ScriptContext.GLOBAL_SCOPE));
    dumpBindings(engine2.getBindings(ScriptContext.ENGINE_SCOPE));
    dumpBindings(engine.getBindings(ScriptContext.ENGINE_SCOPE));
}

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From source file:Main.java

public static void main(String[] args) throws ScriptException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    manager.put("n1", 1);
    String script = "var sum = n1 + n2;print(msg + " + "' n1=' + n1 + ', n2=' + n2 + " + "', sum=' + sum);";

    engine.put("n2", 2);
    engine.put("msg", "a string");
    engine.eval(script);/*from   ww w.  j ava2  s .co  m*/

    Bindings bindings = engine.createBindings();
    bindings.put("n2", 3);
    bindings.put("msg", "another string");
    engine.eval(script, bindings);

    ScriptContext ctx = new SimpleScriptContext();
    Bindings ctxGlobalBindings = engine.createBindings();
    ctx.setBindings(ctxGlobalBindings, GLOBAL_SCOPE);
    ctx.setAttribute("n1", 4, GLOBAL_SCOPE);
    ctx.setAttribute("n2", 5, ENGINE_SCOPE);
    ctx.setAttribute("msg", "ScriptContext:", ENGINE_SCOPE);
    engine.eval(script, ctx);

    engine.eval(script);
}

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From source file:com.jkoolcloud.tnt4j.streams.filters.JavaScriptActivityExpressionFilter.java

@Override
public boolean doFilter(ActivityInfo activityInfo) throws FilterException {
    ScriptEngineManager factory = new ScriptEngineManager();
    ScriptEngine engine = factory.getEngineByName(JAVA_SCRIPT_LANG);

    if (CollectionUtils.isNotEmpty(exprVars)) {
        Object fValue;/*from  ww  w. ja  v  a  2s.c om*/
        String fieldName;
        for (String eVar : exprVars) {
            fieldName = eVar.substring(2, eVar.length() - 1);
            fValue = activityInfo.getFieldValue(fieldName);
            fieldName = placeHoldersMap.get(eVar);
            factory.put(StringUtils.isEmpty(fieldName) ? eVar : fieldName, fValue);
        }
    }

    try {
        boolean match = (boolean) engine.eval(StreamsScriptingUtils.addDefaultJSScriptImports(getExpression()));

        boolean filteredOut = isFilteredOut(getHandleType(), match);
        activityInfo.setFiltered(filteredOut);

        return filteredOut;
    } catch (Exception exc) {
        throw new FilterException(StreamsResources.getStringFormatted(StreamsResources.RESOURCE_BUNDLE_NAME,
                "ExpressionFilter.filtering.failed", filterExpression), exc);
    }
}

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From source file:org.apache.solr.update.processor.StatelessScriptUpdateProcessorFactory.java

/**
 * Initializes a list of script engines - an engine per script file.
 *
 * @param req The solr request.//from ww  w . ja v a2  s.co  m
 * @param rsp The solr response
 * @return The list of initialized script engines.
 */
private List<EngineInfo> initEngines(SolrQueryRequest req, SolrQueryResponse rsp) throws SolrException {

    List<EngineInfo> scriptEngines = new ArrayList<>();

    ScriptEngineManager scriptEngineManager = new ScriptEngineManager(resourceLoader.getClassLoader());

    scriptEngineManager.put("logger", log);
    scriptEngineManager.put("req", req);
    scriptEngineManager.put("rsp", rsp);
    if (params != null) {
        scriptEngineManager.put("params", params);
    }

    for (ScriptFile scriptFile : scriptFiles) {
        ScriptEngine engine = null;
        if (null != engineName) {
            engine = scriptEngineManager.getEngineByName(engineName);
            if (engine == null) {
                String details = getSupportedEngines(scriptEngineManager, false);
                throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "No ScriptEngine found by name: "
                        + engineName + (null != details ? " -- supported names: " + details : ""));
            }
        } else {
            engine = scriptEngineManager.getEngineByExtension(scriptFile.getExtension());
            if (engine == null) {
                String details = getSupportedEngines(scriptEngineManager, true);
                throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
                        "No ScriptEngine found by file extension: " + scriptFile.getFileName()
                                + (null != details ? " -- supported extensions: " + details : ""));

            }
        }

        if (!(engine instanceof Invocable)) {
            String msg = "Engine "
                    + ((null != engineName) ? engineName : ("for script " + scriptFile.getFileName()))
                    + " does not support function invocation (via Invocable): " + engine.getClass().toString()
                    + " (" + engine.getFactory().getEngineName() + ")";
            log.error(msg);
            throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, msg);
        }

        if (scriptEngineCustomizer != null) {
            scriptEngineCustomizer.customize(engine);
        }

        scriptEngines.add(new EngineInfo((Invocable) engine, scriptFile));
        try {
            Reader scriptSrc = scriptFile.openReader(resourceLoader);

            try {
                engine.eval(scriptSrc);
            } catch (ScriptException e) {
                throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
                        "Unable to evaluate script: " + scriptFile.getFileName(), e);
            } finally {
                IOUtils.closeQuietly(scriptSrc);
            }
        } catch (IOException ioe) {
            throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
                    "Unable to evaluate script: " + scriptFile.getFileName(), ioe);
        }
    }
    return scriptEngines;
}

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