/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, version 2 of the License.

  *

  * This program 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 for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.vm4brwsr;

 import java.io.IOException;

 import java.io.InputStream;

 import java.net.URL;

 import java.util.Enumeration;

 import net.java.html.js.JavaScriptBody;

 import net.java.html.js.JavaScriptResource;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 @JavaScriptResource("obj.js")

 public class Resources {

     @JavaScriptBody(args = {}, body = "return obj;")

     static Object retObj() {

         return null;

     }

     public static boolean isObj() {

         return retObj() != null;

     }

     public static boolean isResource() {

         return Resources.class.getResource("obj.js") != null;

     }

     public static String loadKO() throws IOException {

         InputStream is = Resources.class.getResourceAsStream("ko.js");

         return readIS(is, false);

     }

     static String loadClazz() throws IOException {

         InputStream is = Resources.class.getResourceAsStream("Bck2BrwsrToolkit.class");

         return readIS(is, false);

     }

     private static String readIS(InputStream is, boolean asString) throws IOException {

         if (is == null) {

             return "No resource found!";

         }

         byte[] arr = new byte[4092];

         int len = is.read(arr);

         if (len < 5) {

             return "No data read! Len: " + len;

         }

         if (asString) {

             return new String(arr, 0, len, "UTF-8").toString().toString();

         }

         StringBuilder sb = new StringBuilder();

         sb.append("[");

         for (int i = 0; i < len; i++) {

             sb.append(arr[i]).append(", ");

         }

         return sb.toString().toString();

     }

     static long bytesToLong(byte b1, byte b2, int shift) {

         return (((long)b1 << 56) +

                 ((long)b2 & 255) << 48) >> shift;

     }

     public static String loadHello() throws IOException {

         Enumeration<URL> en;

         try {

             en = Resources.class.getClassLoader().getResources("META-INF/ahoj");

         } catch (SecurityException ex) {

             return "SecurityException";

         }

         StringBuilder sb = new StringBuilder();

         while (en.hasMoreElements()) {

             URL url = en.nextElement();

             sb.append(readIS(url.openStream(), true));

         }

         return sb.toString().toString();

     }

     public static String loadJustHello() throws IOException {

         URL url = Resources.class.getResource("/META-INF/ahoj");

         StringBuilder sb = new StringBuilder();

         sb.append(readIS(url.openStream(), true));

         return sb.toString().toString();

     }

 }