| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.tools; |
| |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.InputStreamReader; |
| import java.io.UnsupportedEncodingException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import javafx.application.Application; |
| import javafx.stage.Stage; |
| import javax.script.Invocable; |
| import javax.script.ScriptEngine; |
| import javax.script.ScriptEngineFactory; |
| import javax.script.ScriptEngineManager; |
| import javax.script.ScriptException; |
| import jdk.nashorn.api.scripting.NashornScriptEngineFactory; |
| |
| /** |
| * This shell is designed to launch a JavaFX application written in Nashorn JavaScript. |
| */ |
| public class FXShell extends Application { |
| /** |
| * Script engine manager to search. |
| */ |
| private ScriptEngineManager manager; |
| /** |
| * Nashorn script engine factory. |
| */ |
| private NashornScriptEngineFactory factory; |
| /** |
| * Main instance of Nashorn script engine. |
| */ |
| private ScriptEngine engine; |
| |
| /** |
| * Needed so that the FX launcher can create an instance of this class. |
| */ |
| public FXShell() { |
| } |
| |
| /** |
| * Main entry point. Never actually used. |
| * @param args Command lien arguments. |
| */ |
| public static void main(String[] args) { |
| launch(args); |
| } |
| |
| /* |
| * Application overrides. |
| */ |
| |
| @Override |
| public void init() throws Exception { |
| // Script engine manager to search. |
| this.manager = new ScriptEngineManager(); |
| |
| // Locate the Nashorn script engine factory. Needed for passing arguments. |
| for (ScriptEngineFactory engineFactory : this.manager.getEngineFactories()) { |
| if (engineFactory.getEngineName().equals("Oracle Nashorn") && engineFactory instanceof NashornScriptEngineFactory) { |
| this.factory = (NashornScriptEngineFactory)engineFactory; |
| } |
| } |
| |
| // If none located. |
| if (this.factory == null) { |
| System.err.println("Nashorn script engine not available"); |
| System.exit(1); |
| } |
| |
| // Get the command line and JNLP parameters. |
| final Parameters parameters = getParameters(); |
| |
| // To collect the script paths and command line arguments. |
| final List<String> paths = new ArrayList<>(); |
| final List<String> args = new ArrayList<>(); |
| |
| // Pull out relevant JNLP named parameters. |
| final Map<String, String> named = parameters.getNamed(); |
| for (Map.Entry<String, String> entry : named.entrySet()) { |
| final String key = entry.getKey(); |
| final String value = entry.getValue(); |
| |
| if ((key.equals("cp") || key.equals("classpath")) && value != null) { |
| args.add("-classpath"); |
| args.add(value); |
| } else if (key.equals("source") && value != null && value.toLowerCase().endsWith(".js")) { |
| paths.add(value); |
| } |
| } |
| |
| // Pull out relevant command line arguments. |
| boolean addNextArg = false; |
| boolean addAllArgs = false; |
| for (String parameter : parameters.getUnnamed()) { |
| if (addAllArgs || addNextArg) { |
| args.add(parameter); |
| addNextArg = false; |
| } else if (parameter.equals("--")) { |
| args.add(parameter); |
| addAllArgs = true; |
| } else if (parameter.startsWith("-")) { |
| args.add(parameter); |
| addNextArg = parameter.equals("-cp") || parameter.equals("-classpath"); |
| } else if (parameter.toLowerCase().endsWith(".js")) { |
| paths.add(parameter); |
| } |
| } |
| |
| // Create a Nashorn script engine with specified arguments. |
| engine = factory.getScriptEngine(args.toArray(new String[args.size()])); |
| |
| // Load initial scripts. |
| for (String path : paths) { |
| load(path); |
| } |
| |
| // Invoke users JavaScript init function if present. |
| try { |
| ((Invocable) engine).invokeFunction("init"); |
| } catch (NoSuchMethodException ex) { |
| // Presence of init is optional. |
| } |
| } |
| |
| @Override |
| public void start(Stage stage) throws Exception { |
| // Invoke users JavaScript start function if present. |
| try { |
| ((Invocable) engine).invokeFunction("start", stage); |
| } catch (NoSuchMethodException ex) { |
| // Presence of start is optional. |
| } |
| } |
| |
| @Override |
| public void stop() throws Exception { |
| // Invoke users JavaScript stop function if present. |
| try { |
| ((Invocable) engine).invokeFunction("stop"); |
| } catch (NoSuchMethodException ex) { |
| // Presence of stop is optional. |
| } |
| } |
| |
| /** |
| * Load and evaluate the specified JavaScript file. |
| * |
| * @param path Path to UTF-8 encoded JavaScript file. |
| * |
| * @return Last evaluation result (discarded.) |
| */ |
| @SuppressWarnings("resource") |
| private Object load(String path) { |
| try { |
| FileInputStream file = new FileInputStream(path); |
| InputStreamReader input = new InputStreamReader(file, "UTF-8"); |
| return engine.eval(input); |
| } catch (FileNotFoundException | UnsupportedEncodingException | ScriptException ex) { |
| ex.printStackTrace(); |
| } |
| |
| return null; |
| } |
| } |