Need to be able to load classes from classpath to find out if a method overrides something in a superclass.
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.JarEntry;
36 import java.util.jar.JarFile;
37 import java.util.logging.Level;
38 import java.util.logging.Logger;
39 import java.util.zip.ZipEntry;
40 import org.apidesign.vm4brwsr.Bck2Brwsr;
42 /** Utilities to process JAR files and set a compiler
46 * @author Jaroslav Tulach
48 public final class Bck2BrwsrJars {
49 private static final Logger LOG = Logger.getLogger(Bck2BrwsrJars.class.getName());
51 private Bck2BrwsrJars() {
54 /** Creates new compiler pre-configured from the content of
55 * provided JAR file. The compiler will compile all classes.
56 * The system understands OSGi manifest entries and will export
57 * all packages that are exported in the JAR file. The system
58 * also recognizes META-INF/services and makes sure the class names
61 * @param c the compiler to {@link Bck2Brwsr#addClasses(java.lang.String...) add classes},
62 * {@link Bck2Brwsr#addResources(java.lang.String...) add resources} and
63 * {@link Bck2Brwsr#addExported(java.lang.String...) exported objects} to.
64 * Can be <code>null</code> - in such case an
65 * {@link Bck2Brwsr#newCompiler() empty compiler} is constructed.
66 * @param jar the file to process
67 * @return newly configured compiler
68 * @throws IOException if something goes wrong
70 public static Bck2Brwsr configureFrom(Bck2Brwsr c, File jar) throws IOException {
71 return configureFrom(c, jar, null);
74 /** Creates new compiler pre-configured from the content of
75 * provided JAR file. The compiler will compile all classes.
76 * The system understands OSGi manifest entries and will export
77 * all packages that are exported in the JAR file. The system
78 * also recognizes META-INF/services and makes sure the class names
81 * @param c the compiler to {@link Bck2Brwsr#addClasses(java.lang.String...) add classes},
82 * {@link Bck2Brwsr#addResources(java.lang.String...) add resources} and
83 * {@link Bck2Brwsr#addExported(java.lang.String...) exported objects} to.
84 * Can be <code>null</code> - in such case an
85 * {@link Bck2Brwsr#newCompiler() empty compiler} is constructed.
86 * @param jar the file to process
87 * @param classpath additional resources to make available during
88 * compilation, but not include them in the generated JavaScript
89 * @return newly configured compiler
90 * @throws IOException if something goes wrong
93 public static Bck2Brwsr configureFrom(
94 Bck2Brwsr c, File jar, final ClassLoader classpath
95 ) throws IOException {
96 if (jar.isDirectory()) {
97 return configureDir(c, jar, classpath);
99 final JarFile jf = new JarFile(jar);
100 final List<String> classes = new ArrayList<>();
101 List<String> resources = new ArrayList<>();
102 Set<String> exported = new HashSet<>();
103 class JarRes extends EmulationResources implements Bck2Brwsr.Resources {
105 super(classpath, classes);
108 public InputStream get(String resource) throws IOException {
109 InputStream is = getConverted(resource);
113 is = jf.getInputStream(new ZipEntry(resource));
114 return is == null ? super.get(resource) : is;
117 JarRes jarRes = new JarRes();
119 listJAR(jf, jarRes, resources, exported);
121 String cp = jf.getManifest().getMainAttributes().getValue("Class-Path"); // NOI18N
122 String[] parts = cp == null ? new String[0] : cp.split(" ");
125 c = Bck2Brwsr.newCompiler();
130 .addClasses(classes.toArray(new String[classes.size()]))
131 .addExported(exported.toArray(new String[exported.size()]))
132 .addResources(resources.toArray(new String[resources.size()]))
136 private static void listJAR(
137 JarFile j, EmulationResources classes,
138 List<String> resources, Set<String> keep
139 ) throws IOException {
140 Enumeration<JarEntry> en = j.entries();
141 while (en.hasMoreElements()) {
142 JarEntry e = en.nextElement();
143 final String n = e.getName();
144 if (n.endsWith("/")) {
147 if (n.startsWith("META-INF/maven/")) {
150 int last = n.lastIndexOf('/');
151 String pkg = n.substring(0, last + 1);
152 if (pkg.startsWith("java/")) {
155 if (n.endsWith(".class")) {
156 classes.addClassResource(n);
159 if (n.startsWith("META-INF/services/") && keep != null) {
160 BufferedReader r = new BufferedReader(new InputStreamReader(j.getInputStream(e)));
162 String l = r.readLine();
166 if (l.startsWith("#")) {
169 keep.add(l.replace('.', '/'));
174 String exp = j.getManifest().getMainAttributes().getValue("Export-Package");
175 if (exp != null && keep != null) {
176 for (String def : exp.split(",")) {
177 for (String sep : def.split(";")) {
178 keep.add(sep.replace('.', '/') + "/");
185 static byte[] readFrom(InputStream is) throws IOException {
186 int expLen = is.available();
190 byte[] arr = new byte[expLen];
193 int read = is.read(arr, pos, arr.length - pos);
198 if (pos == arr.length) {
199 byte[] tmp = new byte[arr.length * 2];
200 System.arraycopy(arr, 0, tmp, 0, arr.length);
204 if (pos != arr.length) {
205 byte[] tmp = new byte[pos];
206 System.arraycopy(arr, 0, tmp, 0, pos);
213 static class EmulationResources implements Bck2Brwsr.Resources {
214 private final List<String> classes;
215 private final Map<String,byte[]> converted = new HashMap<>();
216 private final BytecodeProcessor proc;
217 private final ClassLoader cp;
219 protected EmulationResources(ClassLoader cp, List<String> classes) {
220 this.classes = classes;
221 this.cp = cp != null ? cp : Bck2BrwsrJars.class.getClassLoader();
224 Class<?> bpClass = Class.forName("org.apidesign.bck2brwsr.aot.RetroLambda");
225 p = (BytecodeProcessor) bpClass.newInstance();
226 } catch (Throwable t) {
232 protected final InputStream getConverted(String name) throws IOException {
233 byte[] arr = converted.get(name);
235 return new ByteArrayInputStream(arr);
241 public InputStream get(String name) throws IOException {
242 InputStream is = getConverted(name);
246 Enumeration<URL> en = cp.getResources(name);
248 while (en.hasMoreElements()) {
249 u = en.nextElement();
252 LOG.log(Level.WARNING, "Cannot find {0}", name);
255 if (u.toExternalForm().contains("/rt.jar!")) {
256 LOG.log(Level.WARNING, "{0}No bootdelegation for ", name);
259 return u.openStream();
262 private void addClassResource(String n) throws IOException {
264 try (InputStream is = this.get(n)) {
265 Map<String, byte[]> conv = proc.process(n, readFrom(is), this);
267 boolean found = false;
268 for (Map.Entry<String, byte[]> entrySet : conv.entrySet()) {
269 String res = entrySet.getKey();
270 byte[] bytes = entrySet.getValue();
274 assert res.endsWith(".class") : "Wrong resource: " + res;
275 converted.put(res, bytes);
276 classes.add(res.substring(0, res.length() - 6));
279 throw new IOException("Cannot find " + n + " among " + conv);
285 classes.add(n.substring(0, n.length() - 6));
289 private static Bck2Brwsr configureDir(Bck2Brwsr c, final File dir, ClassLoader cp) throws IOException {
290 List<String> arr = new ArrayList<>();
291 List<String> classes = new ArrayList<>();
292 class DirRes extends EmulationResources {
293 public DirRes(ClassLoader cp, List<String> classes) {
298 public InputStream get(String name) throws IOException {
299 InputStream is = super.get(name);
303 File r = new File(dir, name.replace('/', File.separatorChar));
305 return new FileInputStream(r);
310 DirRes dirRes = new DirRes(cp, classes);
311 listDir(dir, null, dirRes, arr);
313 c = Bck2Brwsr.newCompiler();
316 .addRootClasses(classes.toArray(new String[0]))
317 .addResources(arr.toArray(new String[0]))
319 //.obfuscation(ObfuscationLevel.FULL)
323 private static void listDir(
324 File f, String pref, EmulationResources res, List<String> resources
325 ) throws IOException {
326 File[] arr = f.listFiles();
328 if (f.getName().endsWith(".class")) {
329 res.addClassResource(pref + f.getName());
331 resources.add(pref + f.getName());
334 for (File ch : arr) {
335 listDir(ch, pref == null ? "" : pref + f.getName() + "/", res, resources);