Examples with ScriptEngine javax.script.ScriptEngine used on opensource projects

Example 96 with ScriptEngine

use of javax.script.ScriptEngine in project camel by apache.

the class Jsr223Test method testLanguageNames.

@Test
public void testLanguageNames() throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    for (String scriptName : scriptNames) {
        ScriptEngine engine = manager.getEngineByName(scriptName);
        assertNotNull("We should get the script engine for " + scriptName, engine);
    }
}

Example 97 with ScriptEngine

use of javax.script.ScriptEngine in project spring-framework by spring-projects.

the class ScriptTemplateView method renderInternal.

@Override
protected Mono<Void> renderInternal(Map<String, Object> model, MediaType contentType, ServerWebExchange exchange) {
    return Mono.defer(() -> {
        ServerHttpResponse response = exchange.getResponse();
        try {
            ScriptEngine engine = getEngine();
            Invocable invocable = (Invocable) engine;
            String url = getUrl();
            String template = getTemplate(url);
            Function<String, String> templateLoader = path -> {
                try {
                    return getTemplate(path);
                } catch (IOException ex) {
                    throw new IllegalStateException(ex);
                }
            };
            RenderingContext context = new RenderingContext(this.getApplicationContext(), this.locale, templateLoader, url);
            Object html;
            if (this.renderObject != null) {
                Object thiz = engine.eval(this.renderObject);
                html = invocable.invokeMethod(thiz, this.renderFunction, template, model, context);
            } else {
                html = invocable.invokeFunction(this.renderFunction, template, model, context);
            }
            byte[] bytes = String.valueOf(html).getBytes(StandardCharsets.UTF_8);
            DataBuffer buffer = response.bufferFactory().allocateBuffer(bytes.length).write(bytes);
            return response.writeWith(Mono.just(buffer));
        } catch (ScriptException ex) {
            throw new IllegalStateException("Failed to render script template", new StandardScriptEvalException(ex));
        } catch (Exception ex) {
            throw new IllegalStateException("Failed to render script template", ex);
        }
    });
}

Example 98 with ScriptEngine

use of javax.script.ScriptEngine in project spring-framework by spring-projects.

the class ScriptTemplateView method createEngineFromName.

protected ScriptEngine createEngineFromName() {
    if (this.scriptEngineManager == null) {
        this.scriptEngineManager = new ScriptEngineManager(getApplicationContext().getClassLoader());
    }
    ScriptEngine engine = StandardScriptUtils.retrieveEngineByName(this.scriptEngineManager, this.engineName);
    loadScripts(engine);
    return engine;
}

Example 99 with ScriptEngine

use of javax.script.ScriptEngine in project spring-framework by spring-projects.

the class ScriptTemplateView method renderMergedOutputModel.

@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {
    try {
        ScriptEngine engine = getEngine();
        Invocable invocable = (Invocable) engine;
        String url = getUrl();
        String template = getTemplate(url);
        Function<String, String> templateLoader = path -> {
            try {
                return getTemplate(path);
            } catch (IOException ex) {
                throw new IllegalStateException(ex);
            }
        };
        RenderingContext context = new RenderingContext(this.getApplicationContext(), this.locale, templateLoader, url);
        Object html;
        if (this.renderObject != null) {
            Object thiz = engine.eval(this.renderObject);
            html = invocable.invokeMethod(thiz, this.renderFunction, template, model, context);
        } else {
            html = invocable.invokeFunction(this.renderFunction, template, model, context);
        }
        response.getWriter().write(String.valueOf(html));
    } catch (ScriptException ex) {
        throw new ServletException("Failed to render script template", new StandardScriptEvalException(ex));
    }
}

Example 100 with ScriptEngine

use of javax.script.ScriptEngine in project spring-framework by spring-projects.

the class StandardScriptUtils method retrieveEngineByName.

/**
	 * Retrieve a {@link ScriptEngine} from the given {@link ScriptEngineManager}
	 * by name, delegating to {@link ScriptEngineManager#getEngineByName} but
	 * throwing a descriptive exception if not found or if initialization failed.
	 * @param scriptEngineManager the ScriptEngineManager to use
	 * @param engineName the name of the engine
	 * @return a corresponding ScriptEngine (never {@code null})
	 * @throws IllegalArgumentException if no matching engine has been found
	 * @throws IllegalStateException if the desired engine failed to initialize
	 */
public static ScriptEngine retrieveEngineByName(ScriptEngineManager scriptEngineManager, String engineName) {
    ScriptEngine engine = scriptEngineManager.getEngineByName(engineName);
    if (engine == null) {
        Set<String> engineNames = new LinkedHashSet<>();
        for (ScriptEngineFactory engineFactory : scriptEngineManager.getEngineFactories()) {
            List<String> factoryNames = engineFactory.getNames();
            if (factoryNames.contains(engineName)) {
                // If it happens to initialize fine now, alright, but we really expect an exception.
                try {
                    engine = engineFactory.getScriptEngine();
                    engine.setBindings(scriptEngineManager.getBindings(), ScriptContext.GLOBAL_SCOPE);
                } catch (Throwable ex) {
                    throw new IllegalStateException("Script engine with name '" + engineName + "' failed to initialize", ex);
                }
            }
            engineNames.addAll(factoryNames);
        }
        throw new IllegalArgumentException("Script engine with name '" + engineName + "' not found; registered engine names: " + engineNames);
    }
    return engine;
}