The Tor Browser / file comparison
comparison: build/annotationProcessors/classloader/IterableJarLoadingURLClassLoader.java
build/annotationProcessors/classloader/IterableJarLoadingURLClassLoader.java
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:d479c23b03ef |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.annotationProcessors.classloader; | |
| 6 | |
| 7 import java.io.File; | |
| 8 import java.io.IOException; | |
| 9 import java.net.URL; | |
| 10 import java.net.URLClassLoader; | |
| 11 import java.util.Collections; | |
| 12 import java.util.Enumeration; | |
| 13 import java.util.Iterator; | |
| 14 import java.util.LinkedList; | |
| 15 import java.util.jar.JarEntry; | |
| 16 import java.util.jar.JarFile; | |
| 17 | |
| 18 /** | |
| 19 * A classloader which can be initialised with a list of jar files and which can provide an iterator | |
| 20 * over the top level classes in the jar files it was initialised with. | |
| 21 * classNames is kept sorted to ensure iteration order is consistent across program invocations. | |
| 22 * Otherwise, we'd forever be reporting the outdatedness of the generated code as we permute its | |
| 23 * contents. | |
| 24 */ | |
| 25 public class IterableJarLoadingURLClassLoader extends URLClassLoader { | |
| 26 LinkedList<String> classNames = new LinkedList<String>(); | |
| 27 | |
| 28 /** | |
| 29 * Create an instance and return its iterator. Provides an iterator over the classes in the jar | |
| 30 * files provided as arguments. | |
| 31 * Inner classes are not supported. | |
| 32 * | |
| 33 * @param args A list of jar file names an iterator over the classes of which is desired. | |
| 34 * @return An iterator over the top level classes in the jar files provided, in arbitrary order. | |
| 35 */ | |
| 36 public static Iterator<ClassWithOptions> getIteratorOverJars(String[] args) { | |
| 37 URL[] urlArray = new URL[args.length]; | |
| 38 LinkedList<String> aClassNames = new LinkedList<String>(); | |
| 39 | |
| 40 for (int i = 0; i < args.length; i++) { | |
| 41 try { | |
| 42 urlArray[i] = (new File(args[i])).toURI().toURL(); | |
| 43 | |
| 44 Enumeration<JarEntry> entries = new JarFile(args[i]).entries(); | |
| 45 while (entries.hasMoreElements()) { | |
| 46 JarEntry e = entries.nextElement(); | |
| 47 String fName = e.getName(); | |
| 48 if (!fName.endsWith(".class")) { | |
| 49 continue; | |
| 50 } | |
| 51 final String className = fName.substring(0, fName.length() - 6).replace('/', '.'); | |
| 52 | |
| 53 aClassNames.add(className); | |
| 54 } | |
| 55 } catch (IOException e) { | |
| 56 System.err.println("Error loading jar file \"" + args[i] + '"'); | |
| 57 e.printStackTrace(System.err); | |
| 58 } | |
| 59 } | |
| 60 Collections.sort(aClassNames); | |
| 61 return new JarClassIterator(new IterableJarLoadingURLClassLoader(urlArray, aClassNames)); | |
| 62 } | |
| 63 | |
| 64 /** | |
| 65 * Constructs a classloader capable of loading all classes given as URLs in urls. Used by static | |
| 66 * method above. | |
| 67 * | |
| 68 * @param urls URLs for all classes the new instance shall be capable of loading. | |
| 69 * @param aClassNames A list of names of the classes this instance shall be capable of loading. | |
| 70 */ | |
| 71 protected IterableJarLoadingURLClassLoader(URL[] urls, LinkedList<String> aClassNames) {// Array to populate with URLs for each class in the given jars. | |
| 72 super(urls); | |
| 73 classNames = aClassNames; | |
| 74 } | |
| 75 } |
