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.bck2brwsr.aot;
20 import java.io.BufferedReader;
21 import java.io.ByteArrayInputStream;
23 import java.io.FileInputStream;
24 import java.io.IOException;
25 import java.io.InputStream;
26 import java.io.InputStreamReader;
28 import java.util.ArrayList;
29 import java.util.Enumeration;
30 import java.util.HashMap;
31 import java.util.HashSet;
32 import java.util.List;
35 import java.util.jar.Attributes;
36 import java.util.jar.JarEntry;
37 import java.util.jar.JarFile;
38 import java.util.logging.Level;
39 import java.util.logging.Logger;
40 import java.util.zip.ZipEntry;
41 import org.apidesign.vm4brwsr.Bck2Brwsr;
43 /** Utilities to process JAR files and set a compiler
47 * @author Jaroslav Tulach
49 public final class Bck2BrwsrJars {
50 private static final Logger LOG = Logger.getLogger(Bck2BrwsrJars.class.getName());
52 private Bck2BrwsrJars() {
55 /** Creates new compiler pre-configured from the content of
56 * provided JAR file. The compiler will compile all classes.
57 * The system understands OSGi manifest entries and will export
58 * all packages that are exported in the JAR file. The system
59 * also recognizes META-INF/services and makes sure the class names
62 * @param c the compiler to {@link Bck2Brwsr#addClasses(java.lang.String...) add classes},
63 * {@link Bck2Brwsr#addResources(java.lang.String...) add resources} and
64 * {@link Bck2Brwsr#addExported(java.lang.String...) exported objects} to.
65 * Can be <code>null</code> - in such case an
66 * {@link Bck2Brwsr#newCompiler() empty compiler} is constructed.
67 * @param jar the file to process
68 * @return newly configured compiler
69 * @throws IOException if something goes wrong
71 public static Bck2Brwsr configureFrom(Bck2Brwsr c, File jar) throws IOException {
72 return configureFrom(c, jar, null);
75 /** Creates new compiler pre-configured from the content of
76 * provided JAR file. The compiler will compile all classes.
77 * The system understands OSGi manifest entries and will export
78 * all packages that are exported in the JAR file. The system
79 * also recognizes META-INF/services and makes sure the class names
82 * @param c the compiler to {@link Bck2Brwsr#addClasses(java.lang.String...) add classes},
83 * {@link Bck2Brwsr#addResources(java.lang.String...) add resources} and
84 * {@link Bck2Brwsr#addExported(java.lang.String...) exported objects} to.
85 * Can be <code>null</code> - in such case an
86 * {@link Bck2Brwsr#newCompiler() empty compiler} is constructed.
87 * @param jar the file to process
88 * @param classpath additional resources to make available during
89 * compilation, but not include them in the generated JavaScript
90 * @return newly configured compiler
91 * @throws IOException if something goes wrong
94 public static Bck2Brwsr configureFrom(
95 Bck2Brwsr c, File jar, final ClassLoader classpath
96 ) throws IOException {
97 if (jar.isDirectory()) {
98 return configureDir(c, jar, classpath);
100 final JarFile jf = new JarFile(jar);
101 final List<String> classes = new ArrayList<>();
102 List<String> resources = new ArrayList<>();
103 Set<String> exported = new HashSet<>();
104 class JarRes extends EmulationResources implements Bck2Brwsr.Resources {
106 super(classpath, classes);
109 public InputStream get(String resource) throws IOException {
110 InputStream is = getConverted(resource);
114 is = jf.getInputStream(new ZipEntry(resource));
115 return is == null ? super.get(resource) : is;
118 JarRes jarRes = new JarRes();
120 listJAR(jf, jarRes, resources, exported);
122 String cp = jf.getManifest().getMainAttributes().getValue("Class-Path"); // NOI18N
123 String[] parts = cp == null ? new String[0] : cp.split(" ");
126 c = Bck2Brwsr.newCompiler();
131 .addClasses(classes.toArray(new String[classes.size()]))
132 .addExported(exported.toArray(new String[exported.size()]))
133 .addResources(resources.toArray(new String[resources.size()]))
137 private static void listJAR(
138 JarFile j, EmulationResources classes,
139 List<String> resources, Set<String> keep
140 ) throws IOException {
141 Enumeration<JarEntry> en = j.entries();
142 while (en.hasMoreElements()) {
143 JarEntry e = en.nextElement();
144 final String n = e.getName();
145 if (n.endsWith("/")) {
148 if (n.startsWith("META-INF/maven/")) {
151 int last = n.lastIndexOf('/');
152 String pkg = n.substring(0, last + 1);
153 if (pkg.startsWith("java/")) {
156 if (n.endsWith(".class")) {
157 classes.addClassResource(n);
160 if (n.startsWith("META-INF/services/") && keep != null) {
161 BufferedReader r = new BufferedReader(new InputStreamReader(j.getInputStream(e)));
163 String l = r.readLine();
167 if (l.startsWith("#")) {
170 keep.add(l.replace('.', '/'));
176 final Attributes mainAttr = j.getManifest().getMainAttributes();
177 exportPublicPackages(mainAttr, keep);
181 static void exportPublicPackages(final Attributes mainAttr, Set<String> keep) {
182 String exp = mainAttr.getValue("Export-Package"); // NOI18N
184 for (String def : exp.split(",")) {
185 for (String sep : def.split(";")) {
186 keep.add(sep.replace('.', '/') + "/");
193 static byte[] readFrom(InputStream is) throws IOException {
194 int expLen = is.available();
198 byte[] arr = new byte[expLen];
201 int read = is.read(arr, pos, arr.length - pos);
206 if (pos == arr.length) {
207 byte[] tmp = new byte[arr.length * 2];
208 System.arraycopy(arr, 0, tmp, 0, arr.length);
212 if (pos != arr.length) {
213 byte[] tmp = new byte[pos];
214 System.arraycopy(arr, 0, tmp, 0, pos);
221 static class EmulationResources implements Bck2Brwsr.Resources {
222 private final List<String> classes;
223 private final Map<String,byte[]> converted = new HashMap<>();
224 private final BytecodeProcessor proc;
225 private final ClassLoader cp;
227 protected EmulationResources(ClassLoader cp, List<String> classes) {
228 this.classes = classes;
229 this.cp = cp != null ? cp : Bck2BrwsrJars.class.getClassLoader();
232 Class<?> bpClass = Class.forName("org.apidesign.bck2brwsr.aot.RetroLambda");
233 p = (BytecodeProcessor) bpClass.newInstance();
234 } catch (Throwable t) {
240 protected final InputStream getConverted(String name) throws IOException {
241 byte[] arr = converted.get(name);
243 return new ByteArrayInputStream(arr);
249 public InputStream get(String name) throws IOException {
250 InputStream is = getConverted(name);
254 Enumeration<URL> en = cp.getResources(name);
256 while (en.hasMoreElements()) {
257 u = en.nextElement();
260 LOG.log(Level.WARNING, "Cannot find {0}", name);
263 if (u.toExternalForm().contains("/rt.jar!")) {
264 LOG.log(Level.WARNING, "{0}No bootdelegation for ", name);
267 return u.openStream();
270 private void addClassResource(String n) throws IOException {
272 try (InputStream is = this.get(n)) {
273 Map<String, byte[]> conv = proc.process(n, readFrom(is), this);
275 boolean found = false;
276 for (Map.Entry<String, byte[]> entrySet : conv.entrySet()) {
277 String res = entrySet.getKey();
278 byte[] bytes = entrySet.getValue();
282 assert res.endsWith(".class") : "Wrong resource: " + res;
283 converted.put(res, bytes);
284 classes.add(res.substring(0, res.length() - 6));
287 throw new IOException("Cannot find " + n + " among " + conv);
293 classes.add(n.substring(0, n.length() - 6));
297 private static Bck2Brwsr configureDir(Bck2Brwsr c, final File dir, ClassLoader cp) throws IOException {
298 List<String> arr = new ArrayList<>();
299 List<String> classes = new ArrayList<>();
300 class DirRes extends EmulationResources {
301 public DirRes(ClassLoader cp, List<String> classes) {
306 public InputStream get(String name) throws IOException {
307 InputStream is = super.get(name);
311 File r = new File(dir, name.replace('/', File.separatorChar));
313 return new FileInputStream(r);
318 DirRes dirRes = new DirRes(cp, classes);
319 listDir(dir, null, dirRes, arr);
321 c = Bck2Brwsr.newCompiler();
324 .addRootClasses(classes.toArray(new String[0]))
325 .addResources(arr.toArray(new String[0]))
327 //.obfuscation(ObfuscationLevel.FULL)
331 private static void listDir(
332 File f, String pref, EmulationResources res, List<String> resources
333 ) throws IOException {
334 File[] arr = f.listFiles();
336 if (f.getName().endsWith(".class")) {
337 res.addClassResource(pref + f.getName());
339 resources.add(pref + f.getName());
342 for (File ch : arr) {
343 listDir(ch, pref == null ? "" : pref + f.getName() + "/", res, resources);