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/**
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* Back 2 Browser Bytecode Translator
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. Look for COPYING file in the top folder.
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* If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.bck2brwsr.launcher;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.StringWriter;
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import java.net.JarURLConnection;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.Enumeration;
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import java.util.List;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import java.util.zip.ZipEntry;
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import org.apidesign.bck2brwsr.launcher.BaseHTTPLauncher.Res;
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import org.apidesign.vm4brwsr.Bck2Brwsr;
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/**
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*
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* @author Jaroslav Tulach
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*/
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class CompileCP {
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static String compileJAR(final JarFile jar) throws IOException {
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List<String> arr = new ArrayList<>();
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List<String> classes = new ArrayList<>();
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listJAR(jar, classes, arr);
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StringWriter w = new StringWriter();
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try {
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class JarRes extends EmulationResources implements Bck2Brwsr.Resources {
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@Override
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public InputStream get(String resource) throws IOException {
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InputStream is = jar.getInputStream(new ZipEntry(resource));
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return is == null ? super.get(resource) : is;
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}
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}
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Bck2Brwsr.newCompiler()
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.addClasses(classes.toArray(new String[0]))
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.addResources(arr.toArray(new String[0]))
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.library(true)
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.resources(new JarRes())
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.generate(w);
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w.flush();
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return w.toString();
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} catch (Throwable ex) {
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throw new IOException("Cannot compile: ", ex);
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} finally {
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w.close();
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}
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}
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static String compileFromClassPath(URL u, final Res r) throws IOException {
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File f;
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try {
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f = new File(u.toURI());
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} catch (URISyntaxException ex) {
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throw new IOException(ex);
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}
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for (String s : System.getProperty("java.class.path").split(File.pathSeparator)) {
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if (!f.getPath().startsWith(s)) {
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continue;
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}
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File root = new File(s);
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List<String> arr = new ArrayList<>();
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List<String> classes = new ArrayList<>();
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listDir(root, null, classes, arr);
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StringWriter w = new StringWriter();
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try {
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Bck2Brwsr.newCompiler()
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.addRootClasses(classes.toArray(new String[0]))
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.addResources(arr.toArray(new String[0]))
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.library(true)
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.resources(new EmulationResources() {
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@Override
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public InputStream get(String resource) throws IOException {
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if (r != null) {
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final URL url = r.get(resource, 0);
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return url == null ? null : url.openStream();
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}
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return super.get(resource);
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}
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})
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.generate(w);
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w.flush();
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return w.toString();
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} catch (ClassFormatError ex) {
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throw new IOException(ex);
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} finally {
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w.close();
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}
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}
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return null;
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}
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private static void listJAR(JarFile j, List<String> classes, List<String> resources) throws IOException {
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Enumeration<JarEntry> en = j.entries();
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while (en.hasMoreElements()) {
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JarEntry e = en.nextElement();
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final String n = e.getName();
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if (n.contains("package-info")) {
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continue;
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}
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if (n.endsWith("/")) {
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continue;
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}
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int last = n.lastIndexOf('/');
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String pkg = n.substring(0, last + 1);
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if (skipPkg(pkg)) {
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continue;
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}
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if (n.endsWith(".class")) {
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classes.add(n.substring(0, n.length() - 6));
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} else {
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resources.add(n);
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}
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}
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}
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private static boolean skipPkg(String pkg) {
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return pkg.equals("org/apidesign/bck2brwsr/launcher/");
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}
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private static void listDir(File f, String pref, List<String> classes, List<String> resources) throws IOException {
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File[] arr = f.listFiles();
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if (arr == null) {
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if (f.getName().equals("package-info.class")) {
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return;
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}
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if (f.getName().endsWith(".class")) {
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classes.add(pref + f.getName().substring(0, f.getName().length() - 6));
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} else {
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resources.add(pref + f.getName());
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}
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} else {
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for (File ch : arr) {
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listDir(ch, pref == null ? "" : pref + f.getName() + "/", classes, resources);
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}
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}
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}
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static void compileVM(StringBuilder sb, final Res r) throws IOException {
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URL u = r.get(InterruptedException.class.getName().replace('.', '/') + ".class", 0);
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JarURLConnection juc = (JarURLConnection)u.openConnection();
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List<String> arr = new ArrayList<>();
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List<String> classes = new ArrayList<>();
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listJAR(juc.getJarFile(), classes, arr);
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Bck2Brwsr.newCompiler().addRootClasses(classes.toArray(new String[0]))
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.resources(new Bck2Brwsr.Resources() {
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@Override
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public InputStream get(String resource) throws IOException {
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return r.get(resource, 0).openStream();
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}
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}).generate(sb);
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}
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static class EmulationResources implements Bck2Brwsr.Resources {
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@Override
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public InputStream get(String name) throws IOException {
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Enumeration<URL> en = CompileCP.class.getClassLoader().getResources(name);
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URL u = null;
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while (en.hasMoreElements()) {
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u = en.nextElement();
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}
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if (u == null) {
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throw new IOException("Can't find " + name);
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}
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if (u.toExternalForm().contains("rt.jar!")) {
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throw new IOException("No emulation for " + u);
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}
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return u.openStream();
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}
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}
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}
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