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/*
* 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.Arrays;
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$shadowLoader");
ClassLoader shadowLoader = (ClassLoader) shadowLoaderField.get(original);
if (shadowLoader == null) {
synchronized ("lombok$shadowLoader$globalLock".intern()) {
shadowLoader = (ClassLoader) shadowLoaderField.get(original);
if (shadowLoader == null) {
Class shadowClassLoaderClass = (Class) original.getClass().getField("lombok$shadowLoaderClass").get(null);
Class classLoaderClass = Class.forName("java.lang.ClassLoader");
String jarLoc = (String) original.getClass().getField("lombok$location").get(null);
if (shadowClassLoaderClass == null) {
JarFile jf = new JarFile(jarLoc);
InputStream in = null;
try {
ZipEntry entry = jf.getEntry("lombok/launch/ShadowClassLoader.class");
in = jf.getInputStream(entry);
byte[] bytes = new byte[65536];
int len = 0;
while (true) {
int r = in.read(bytes, len, bytes.length - len);
if (r == -1) break;
len += r;
if (len == bytes.length) throw new IllegalStateException("lombok.launch.ShadowClassLoader too large.");
}
in.close();
try {
/* Since Java 16 reflective access to ClassLoader.defineClass is no longer permitted. The recommended solution
* is to use MethodHandles.lookup().defineClass which is useless here because it is limited to classes in the
* same package. Fortunately this code gets transplanted into a ClassLoader and we can call the parent method
* using a MethodHandle. To support old Java versions we use a reflective version of the code snippet below.
*
* Lookup lookup = MethodHandles.lookup();
* MethodType type = MethodType.methodType(Class.class, new Class[] {String.class, byte[].class, int.class, int.class});
* MethodHandle method = lookup.findVirtual(original.getClass(), "defineClass", type);
* shadowClassLoaderClass = (Class) method.invokeWithArguments(original, "lombok.launch.ShadowClassLoader", bytes, new Integer(0), new Integer(len)})
*/
Class methodHandles = Class.forName("java.lang.invoke.MethodHandles");
Class methodHandle = Class.forName("java.lang.invoke.MethodHandle");
Class methodType = Class.forName("java.lang.invoke.MethodType");
Class methodHandlesLookup = Class.forName("java.lang.invoke.MethodHandles$Lookup");
Method lookupMethod = methodHandles.getDeclaredMethod("lookup", null);
Method methodTypeMethod = methodType.getDeclaredMethod("methodType", new Class[] {Class.class, Class[].class});
Method findVirtualMethod = methodHandlesLookup.getDeclaredMethod("findVirtual", new Class[] {Class.class, String.class, methodType});
Method invokeMethod = methodHandle.getDeclaredMethod("invokeWithArguments", new Class[] {Object[].class});
Object lookup = lookupMethod.invoke(null, null);
Object type = methodTypeMethod.invoke(null, new Object[] {Class.class, new Class[] {String.class, byte[].class, int.class, int.class}});
Object method = findVirtualMethod.invoke(lookup, new Object[] {original.getClass(), "defineClass", type});
shadowClassLoaderClass = (Class) invokeMethod.invoke(method, new Object[] {new Object[] {original, "lombok.launch.ShadowClassLoader", bytes, new Integer(0), new Integer(len)}});
} catch (ClassNotFoundException e) {
// Ignore, old Java
}
if (shadowClassLoaderClass == null)
{
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)});
}
original.getClass().getField("lombok$shadowLoaderClass").set(null, shadowClassLoaderClass);
} finally {
if (in != null) in.close();
jf.close();
}
}
Class[] paramTypes = new Class[5];
paramTypes[0] = classLoaderClass;
paramTypes[1] = "".getClass();
paramTypes[2] = paramTypes[1];
paramTypes[3] = Class.forName("java.util.List");
paramTypes[4] = paramTypes[3];
Constructor constructor = shadowClassLoaderClass.getDeclaredConstructor(paramTypes);
constructor.setAccessible(true);
shadowLoader = (ClassLoader) constructor.newInstance(new Object[] {original, "lombok", jarLoc, Arrays.asList(new Object[] {"lombok."}), Arrays.asList(new Object[] {"lombok.patcher.Symbols"})});
shadowLoaderField.set(original, shadowLoader);
}
}
}
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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