jaroslav@323: /**
jaroslav@323:  * Back 2 Browser Bytecode Translator
jaroslav@323:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@323:  *
jaroslav@323:  * This program is free software: you can redistribute it and/or modify
jaroslav@323:  * it under the terms of the GNU General Public License as published by
jaroslav@323:  * the Free Software Foundation, version 2 of the License.
jaroslav@323:  *
jaroslav@323:  * This program is distributed in the hope that it will be useful,
jaroslav@323:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@323:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@323:  * GNU General Public License for more details.
jaroslav@323:  *
jaroslav@323:  * You should have received a copy of the GNU General Public License
jaroslav@323:  * along with this program. Look for COPYING file in the top folder.
jaroslav@323:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@323:  */
jaroslav@323: package org.apidesign.bck2brwsr.launcher;
jaroslav@323: 
jaroslav@332: import java.io.InputStream;
jaroslav@332: import java.lang.reflect.InvocationTargetException;
jaroslav@323: import java.lang.reflect.Method;
jaroslav@332: import java.net.URL;
jaroslav@323: import org.apidesign.bck2brwsr.core.JavaScriptBody;
jaroslav@323: 
jaroslav@323: /**
jaroslav@323:  *
jaroslav@323:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@323:  */
jaroslav@323: public class Console {
jaroslav@323:     public static String welcome() {
jaroslav@323:         final String msg = "Hello from Bck2Brwsr!";
jaroslav@323:         alert(msg);
jaroslav@323:         return msg;
jaroslav@323:     }
jaroslav@323:     
jaroslav@323:     @JavaScriptBody(args = "msg", body = "alert(msg);")
jaroslav@323:     private static native void alert(String msg);
jaroslav@323:     
jaroslav@323:     @JavaScriptBody(args = {"id", "attr"}, body = 
jaroslav@323:         "return window.document.getElementById(id)[attr].toString();")
jaroslav@323:     private static native Object getAttr(String id, String attr);
jaroslav@323: 
jaroslav@323:     @JavaScriptBody(args = {"id", "attr", "value"}, body = 
jaroslav@323:         "window.document.getElementById(id)[attr] = value;")
jaroslav@323:     private static native void setAttr(String id, String attr, Object value);
jaroslav@323:     
jaroslav@323:     public static void execute() throws Exception {
jaroslav@323:         String clazz = (String) getAttr("clazz", "value");
jaroslav@323:         String method = (String) getAttr("method", "value");
jaroslav@332:         Object res = invokeMethod(clazz, method);
jaroslav@332:         setAttr("result", "value", res);
jaroslav@332:     }
jaroslav@332:     
jaroslav@332:     public static void harness() {
jaroslav@332:         try {
jaroslav@332:             URL u = new URL("/execute/data");
jaroslav@332:             String data = (String) u.getContent(new Class[] { String.class });
jaroslav@332:             setAttr("result", "value", data);
jaroslav@332:         } catch (Exception ex) {
jaroslav@332:             setAttr("result", "value", ex.getMessage());
jaroslav@332:         }
jaroslav@332:     }
jaroslav@323: 
jaroslav@332:     private static Object invokeMethod(String clazz, String method) 
jaroslav@332:     throws ClassNotFoundException, InvocationTargetException, 
jaroslav@332:     SecurityException, IllegalAccessException, IllegalArgumentException {
jaroslav@323:         Method found = null;
jaroslav@323:         Class<?> c = Class.forName(clazz);
jaroslav@323:         for (Method m : c.getMethods()) {
jaroslav@323:             if (m.getName().equals(method)) {
jaroslav@323:                 found = m;
jaroslav@323:             }
jaroslav@323:         }
jaroslav@323:         Object res;
jaroslav@323:         if (found != null) {
jaroslav@323:             res = found.invoke(null);
jaroslav@323:         } else {
jaroslav@323:             res = "Can't find method " + method + " in " + clazz;
jaroslav@323:         }
jaroslav@332:         return res;
jaroslav@323:     }
jaroslav@323: }