Java CompiledScript類代碼示例

import javax.script.CompiledScript; //導入依賴的package包/類
@Test
public void invokeFunctionWithCustomScriptContextTest() throws Exception {
    final ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");

    // create an engine and a ScriptContext, but don't set it as default
    final ScriptContext scriptContext = new SimpleScriptContext();

    // Set some value in the context
    scriptContext.setAttribute("myString", "foo", ScriptContext.ENGINE_SCOPE);

    // Evaluate script with custom context and get back a function
    final String script = "function (c) { return myString.indexOf(c); }";
    final CompiledScript compiledScript = ((Compilable)engine).compile(script);
    final Object func = compiledScript.eval(scriptContext);

    // Invoked function should be able to see context it was evaluated with
    final Object result = ((Invocable) engine).invokeMethod(func, "call", func, "o", null);
    assertTrue(((Number)result).intValue() == 1);
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
private void init(Snapshot snapshot) throws RuntimeException {
    this.snapshot = snapshot;
    try {
        ScriptEngineManager manager = new ScriptEngineManager();
        engine = manager.getEngineByName("JavaScript"); // NOI18N
        InputStream strm = getInitStream();
        CompiledScript cs = ((Compilable)engine).compile(new InputStreamReader(strm));
        cs.eval();
        Object heap = ((Invocable)engine).invokeFunction("wrapHeapSnapshot", snapshot); // NOI18N
        engine.put("heap", heap); // NOI18N
        engine.put("cancelled", cancelled); // NOI18N
    } catch (Exception ex) {
        LOGGER.log(Level.SEVERE, "Error initializing snapshot", ex); // NOI18N
        throw new RuntimeException(ex);
    }
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
public void setExternalName ( final CompiledScript script ) throws Exception
{
    final CompoundManager manager = new CompoundManager ();

    for ( final ExternalValue v : SelectionHelper.iterable ( this.selection, ExternalValue.class ) )
    {
        final EditingDomain domain = AdapterFactoryEditingDomain.getEditingDomainFor ( v );
        if ( domain == null )
        {
            continue;
        }
        final String name = evalName ( script, v );
        manager.append ( domain, SetCommand.create ( domain, v, ComponentPackage.Literals.EXTERNAL_VALUE__SOURCE_NAME, name ) );
    }

    manager.executeAll ();
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
public static String evalName ( final CompiledScript script, final ExternalValue v ) throws Exception
{
    final SimpleScriptContext ctx = new SimpleScriptContext ();

    ctx.setAttribute ( "item", v, ScriptContext.ENGINE_SCOPE ); //$NON-NLS-1$

    final Object result = Scripts.executeWithClassLoader ( Activator.class.getClassLoader (), new Callable<Object> () {

        @Override
        public Object call () throws Exception
        {
            return script.eval ( ctx );
        }
    } );

    if ( result == null )
    {
        return null;
    }

    return result.toString ();
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
public static void main(String args[]) throws Exception {
    ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
    ScriptEngine nashorn = scriptEngineManager.getEngineByName("nashorn");
    String name = "Mahesh";

    System.out.println(nashorn.getClass());

    Integer result = null;
    try {
        nashorn.eval("print('" + name + "')");
        result = (Integer) nashorn.eval("10 + 2");
    } catch (ScriptException e) {
        System.out.println("Error executing script: " + e.getMessage());
    }

    jdk.nashorn.api.scripting.NashornScriptEngine x = (jdk.nashorn.api.scripting.NashornScriptEngine)
            nashorn;

    CompiledScript v = x.compile("1+2");

    System.out.println(v.eval());


}
 

import javax.script.CompiledScript; //導入依賴的package包/類
public static VirtualChestItem deserialize(VirtualChestPlugin plugin, DataView data) throws InvalidDataException
{
    DataView serializedStack = data.getView(ITEM).orElseThrow(() -> new InvalidDataException("Expected Item"));

    String requirementString = data.getString(REQUIREMENTS).orElse("");
    Tuple<String, CompiledScript> requirements = plugin.getScriptManager().prepare(requirementString);

    List<DataView> primaryList = getViewListOrSingletonList(PRIMARY_ACTION, data);
    VirtualChestActionDispatcher primaryAction = new VirtualChestActionDispatcher(primaryList);

    List<DataView> secondaryList = getViewListOrSingletonList(SECONDARY_ACTION, data);
    VirtualChestActionDispatcher secondaryAction = new VirtualChestActionDispatcher(secondaryList);

    List<DataView> primaryShiftList = getViewListOrSingletonList(PRIMARY_SHIFT_ACTION, data);
    List<DataView> primaryShiftListFinal = primaryShiftList.isEmpty() ? primaryList : primaryShiftList;
    VirtualChestActionDispatcher primaryShiftAction = new VirtualChestActionDispatcher(primaryShiftListFinal);

    List<DataView> secondaryShiftList = getViewListOrSingletonList(SECONDARY_SHIFT_ACTION, data);
    List<DataView> secondaryShiftListFinal = secondaryShiftList.isEmpty() ? secondaryList : secondaryShiftList;
    VirtualChestActionDispatcher secondaryShiftAction = new VirtualChestActionDispatcher(secondaryShiftListFinal);

    List<String> ignoredPermissions = data.getStringList(IGNORED_PERMISSIONS).orElse(ImmutableList.of());

    return new VirtualChestItem(plugin, serializedStack, requirements,
            primaryAction, secondaryAction, primaryShiftAction, secondaryShiftAction, ignoredPermissions);
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
private VirtualChestItem(
        VirtualChestPlugin plugin,
        DataView serializedStack,
        Tuple<String, CompiledScript> requirements,
        VirtualChestActionDispatcher primaryAction,
        VirtualChestActionDispatcher secondaryAction,
        VirtualChestActionDispatcher primaryShiftAction,
        VirtualChestActionDispatcher secondaryShiftAction,
        List<String> ignoredPermissions)
{
    this.plugin = plugin;
    this.serializer = new VirtualChestItemStackSerializer(plugin);

    this.serializedStack = serializedStack;
    this.requirements = requirements;
    this.primaryAction = primaryAction;
    this.secondaryAction = secondaryAction;
    this.primaryShiftAction = primaryShiftAction;
    this.secondaryShiftAction = secondaryShiftAction;
    this.ignoredPermissions = ignoredPermissions;
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
/**
 * Executes a compiled script and returns the result.
 * 
 * @param script Compiled script.
 * @param functionName Optional function or method to invoke.
 * @param scriptContext Script execution context.
 * @return The script result.
 * @throws IllegalArgumentException
 */
public static Object executeScript(CompiledScript script, String functionName, ScriptContext scriptContext, Object[] args) throws ScriptException, NoSuchMethodException {
    Assert.notNull("script", script, "scriptContext", scriptContext);
    Object result = script.eval(scriptContext);
    if (UtilValidate.isNotEmpty(functionName)) {
        if (Debug.verboseOn()) {
            Debug.logVerbose("Invoking function/method " + functionName, module);
        }
        ScriptEngine engine = script.getEngine();
        try {
            Invocable invocableEngine = (Invocable) engine;
            result = invocableEngine.invokeFunction(functionName, args == null ? EMPTY_ARGS : args);
        } catch (ClassCastException e) {
            throw new ScriptException("Script engine " + engine.getClass().getName() + " does not support function/method invocations");
        }
    }
    return result;
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
@Test
public final void test() throws Exception {
	String csvMapperScript = "mapFunction = function(inputHeaders, inputField, inputValue, outputField, line) return inputValue end";
	String simpleScript = "return inputValue";
	CompiledScript compiledScript = (CompiledScript) ((Compilable) scriptEngine).compile(simpleScript);
	Bindings bindings = scriptEngine.createBindings();
	// inputHeaders, inputField, inputValue, outputField, line
	bindings.put("inputHeaders", "");
	bindings.put("inputField", "");
	bindings.put("inputValue", "testreturnvalue");
	bindings.put("outputField", "");
	bindings.put("line", "");
	String result = (String) compiledScript.eval(bindings);
	System.out.println(result);
	assertEquals("testreturnvalue", result);
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
@SuppressWarnings("unchecked")
@Override
public List<Object> runMap(CallingContext context, RaptureScript script, RaptureDataContext data, Map<String, Object> parameters) {
    try {
        ScriptEngine engine = engineRef.get();
        CompiledScript cScript = getMapScript(engine, script);
        addStandardContext(context, engine);
        engine.put(PARAMS, parameters);
        engine.put(DATA, JacksonUtil.getHashFromObject(data));
        Kernel.getKernel().getStat().registerRunScript();

        return (List<Object>) cScript.eval();
    } catch (ScriptException e) {
        Kernel.writeAuditEntry(EXCEPTION, 2, e.getMessage());
        throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error running script " + script.getName(), e);

    }
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
@Override
public String runOperation(CallingContext context, RaptureScript script, String ctx, Map<String, Object> params) {
    // Get the script from the implementation bit, set up the helpers into
    // the context and execute...
    try {
        ScriptEngine engine = engineRef.get();
        CompiledScript cScript = getOperationScript(engine, script);
        addStandardContext(context, engine);
        engine.put(PARAMS, params);
        engine.put(CTX, ctx);
        Kernel.getKernel().getStat().registerRunScript();
        return JacksonUtil.jsonFromObject(cScript.eval());
    } catch (ScriptException e) {
        Kernel.writeAuditEntry(EXCEPTION, 2, e.getMessage());
        throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error running script " + script.getName(), e);
    }
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
@Override
public String runProgram(CallingContext context, IActivityInfo activity, RaptureScript script, Map<String, Object> extraParams) {
    try {
        ScriptEngine engine = engineRef.get();
        CompiledScript cScript = getProgramScript(engine, script);
        addStandardContext(context, engine);
        for (Map.Entry<String, ?> entry : extraParams.entrySet()) {
            engine.put(entry.getKey(), entry.getValue());
        }
        if (Kernel.getKernel().getStat() != null) {
            Kernel.getKernel().getStat().registerRunScript();
        }
        return JacksonUtil.jsonFromObject(cScript.eval());
    } catch (ScriptException e) {
        Kernel.writeAuditEntry(EXCEPTION, 2, e.getMessage());
        throw RaptureExceptionFactory.create(HttpURLConnection.HTTP_INTERNAL_ERROR, "Error running script " + script.getName(), e);
    }
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
@Test
public void invokeFunctionWithCustomScriptContextTest() throws Exception {
    final ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");

    // create an engine and a ScriptContext, but don't set it as default
    ScriptContext scriptContext = new SimpleScriptContext();

    // Set some value in the context
    scriptContext.setAttribute("myString", "foo", ScriptContext.ENGINE_SCOPE);

    // Evaluate script with custom context and get back a function
    final String script = "function (c) { return myString.indexOf(c); }";
    CompiledScript compiledScript = ((Compilable)engine).compile(script);
    Object func = compiledScript.eval(scriptContext);

    // Invoked function should be able to see context it was evaluated with
    Object result = ((Invocable) engine).invokeMethod(func, "call", func, "o", null);
    assertTrue(((Number)result).intValue() == 1);
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
public static Boolean evaluateActivationExpression(Bindings bindings, Expression activationExpression) {
	Boolean expressionResult; 
	if(activationExpression!=null) {
		CompiledScript script = activationExpression.compiledScript;
		if(script!=null) {
			try {
				Object evaluationResult = script.eval(bindings);
				if(evaluationResult instanceof Boolean) {
					expressionResult = (Boolean) evaluationResult;
				} else {
					expressionResult = false;
				}
			} catch (ScriptException e) {
				expressionResult = false;
			}
		} else {
			expressionResult = true;
		}
	} else {
		expressionResult = true;
	}
	return expressionResult;
}
 

import javax.script.CompiledScript; //導入依賴的package包/類
public Object evaluate(final String expression, final Map<String, ?> values) throws ExpressionEvaluationException {
    LOG.debug("Evaluating JavaScript expression: {1}", expression);
    try {
        final Bindings scope = engine.createBindings();
        for (final Entry<String, ?> entry : values.entrySet()) {
            scope.put(entry.getKey(), entry.getValue());
        }

        if (compilable != null) {
            CompiledScript compiled = compiledCache.get(expression);
            if (compiled == null) {
                compiled = compilable.compile(expression);
                compiledCache.put(expression, compiled);
            }
            return compiled.eval(scope);
        }
        return engine.eval(expression, scope);
    } catch (final ScriptException ex) {
        throw new ExpressionEvaluationException("Evaluating JavaScript expression failed: " + expression, ex);
    }
}