2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.vm4brwsr;
20 import java.io.IOException;
21 import java.io.InputStream;
23 import java.util.Enumeration;
25 import java.util.TreeSet;
29 * @author Jaroslav Tulach <jtulach@netbeans.org>
31 public final class BytesLoader {
32 private static Set<String> requested = new TreeSet<String>();
34 public byte[] get(String name) throws IOException {
35 if (!requested.add(name)) {
36 throw new IllegalStateException("Requested for second time: " + name);
38 byte[] arr = readClass(name);
40 System.err.print("loader['" + name + "'] = [");
41 for (int i = 0; i < arr.length; i++) {
43 System.err.print(", ");
45 System.err.print(arr[i]);
47 System.err.println("]");
52 static byte[] readClass(String name) throws IOException {
54 Enumeration<URL> en = BytesLoader.class.getClassLoader().getResources(name);
55 while (en.hasMoreElements()) {
59 throw new IOException("Can't find " + name);
61 try (InputStream is = u.openStream()) {
63 arr = new byte[is.available()];
65 while (offset < arr.length) {
66 int len = is.read(arr, offset, arr.length - offset);
68 throw new IOException("Can't read " + name);