[shadowloader] Fix for lombok v1.16.0 no longer working in eclipses that use -target 1.4 style class files (such as eclipse indigo). It’s a doozy.

1 files changed, 117 insertions, 0 deletions

diff --git a/src/eclipseAgent/lombok/eclipse/agent/EclipseLoaderPatcherTransplants.java b/src/eclipseAgent/lombok/eclipse/agent/EclipseLoaderPatcherTransplants.java
new file mode 100644
index 00000000..f50e6987
--- /dev/null
+++ b/src/eclipseAgent/lombok/eclipse/agent/EclipseLoaderPatcherTransplants.java
@@ -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);
+		}
+	}
+}