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[shadowloader] Fix for lombok v1.16.0 no longer working in eclipses t…
…hat use -target 1.4 style class files (such as eclipse indigo). It’s a doozy.
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117 changes: 117 additions & 0 deletions
117
src/eclipseAgent/lombok/eclipse/agent/EclipseLoaderPatcherTransplants.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * Copyright (C) 2015 The Project Lombok Authors. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
| package lombok.eclipse.agent; | ||
|
|
||
| import java.io.InputStream; | ||
| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.Field; | ||
| import java.lang.reflect.InvocationTargetException; | ||
| import java.lang.reflect.Method; | ||
| import java.util.jar.JarFile; | ||
| import java.util.zip.ZipEntry; | ||
|
|
||
| /** | ||
| * Contains all the code to be transplanted into eclipse. | ||
| * | ||
| * Do not use: | ||
| * | ||
| * * Annotations | ||
| * * Generics | ||
| * * Varargs | ||
| * * Auto (un)boxing | ||
| * * class literals | ||
| * | ||
| * The above because this code is compiled with -source 1.4, and is transplanted. | ||
| * | ||
| * NB: The suppress warnings will be stripped out before compilation. | ||
| */ | ||
| @SuppressWarnings("all") | ||
| public class EclipseLoaderPatcherTransplants { | ||
| public static boolean overrideLoadDecide(ClassLoader original, String name, boolean resolve) { | ||
| return name.startsWith("lombok."); | ||
| } | ||
|
|
||
| public static Class overrideLoadResult(ClassLoader original, String name, boolean resolve) throws ClassNotFoundException { | ||
| try { | ||
| Field shadowLoaderField = original.getClass().getField("lombok$shadowLoader"); | ||
| ClassLoader shadowLoader = (ClassLoader) shadowLoaderField.get(original); | ||
| if (shadowLoader == null) { | ||
| String jarLoc = (String) original.getClass().getField("lombok$location").get(null); | ||
| JarFile jf = new JarFile(jarLoc); | ||
| InputStream in = null; | ||
| try { | ||
| ZipEntry entry = jf.getEntry("lombok/launch/ShadowClassLoader.class"); | ||
| in = jf.getInputStream(entry); | ||
| byte[] bytes = new byte[65536]; | ||
| int len = 0; | ||
| while (true) { | ||
| int r = in.read(bytes, len, bytes.length - len); | ||
| if (r == -1) break; | ||
| len += r; | ||
| if (len == bytes.length) throw new IllegalStateException("lombok.launch.ShadowClassLoader too large."); | ||
| } | ||
| in.close(); | ||
| Class classLoaderClass = Class.forName("java.lang.ClassLoader"); | ||
| Class shadowClassLoaderClass; { | ||
| Class[] paramTypes = new Class[4]; | ||
| paramTypes[0] = "".getClass(); | ||
| paramTypes[1] = new byte[0].getClass(); | ||
| paramTypes[2] = Integer.TYPE; | ||
| paramTypes[3] = paramTypes[2]; | ||
| Method defineClassMethod = classLoaderClass.getDeclaredMethod("defineClass", paramTypes); | ||
| defineClassMethod.setAccessible(true); | ||
| shadowClassLoaderClass = (Class) defineClassMethod.invoke(original, new Object[] {"lombok.launch.ShadowClassLoader", bytes, new Integer(0), new Integer(len)}); | ||
| } | ||
| Class[] paramTypes = new Class[4]; | ||
| paramTypes[0] = classLoaderClass; | ||
| paramTypes[1] = "".getClass(); | ||
| paramTypes[2] = paramTypes[1]; | ||
| paramTypes[3] = new String[0].getClass(); | ||
| Constructor constructor = shadowClassLoaderClass.getDeclaredConstructor(paramTypes); | ||
| constructor.setAccessible(true); | ||
| shadowLoader = (ClassLoader) constructor.newInstance(new Object[] {original, "lombok", jarLoc, new String[] {"lombok."}}); | ||
| shadowLoaderField.set(original, shadowLoader); | ||
| } finally { | ||
| if (in != null) in.close(); | ||
| jf.close(); | ||
| } | ||
| } | ||
|
|
||
| if (resolve) { | ||
| Class[] paramTypes = new Class[2]; | ||
| paramTypes[0] = "".getClass(); | ||
| paramTypes[1] = Boolean.TYPE; | ||
| Method m = shadowLoader.getClass().getDeclaredMethod("loadClass", new Class[] {String.class, boolean.class}); | ||
| m.setAccessible(true); | ||
| return (Class) m.invoke(shadowLoader, new Object[] {name, Boolean.TRUE}); | ||
| } else { | ||
| return shadowLoader.loadClass(name); | ||
| } | ||
| } catch (Exception ex) { | ||
| Throwable t = ex; | ||
| if (t instanceof InvocationTargetException) t = t.getCause(); | ||
| if (t instanceof RuntimeException) throw (RuntimeException) t; | ||
| if (t instanceof Error) throw (Error) t; | ||
| throw new RuntimeException(t); | ||
| } | ||
| } | ||
| } |
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