1 files changed, 100 insertions, 0 deletions
diff --git a/src_eclipseagent/java/lombok/eclipse/ClassLoaderWorkaround.java b/src_eclipseagent/java/lombok/eclipse/ClassLoaderWorkaround.java
new file mode 100644
index 00000000..bea5f917
--- /dev/null
+++ b/src_eclipseagent/java/lombok/eclipse/ClassLoaderWorkaround.java
@@ -0,0 +1,100 @@
+package java.lombok.eclipse;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+
+/**
+ * Allows you to inject the lombok classes into any classloader, even if that classloader does not
+ * know how to find the lombok classes.
+ * 
+ * Example: Injecting lombok's Eclipse Parser patching code into eclipse's OSGi BundleLoader.
+ * 
+ * @author rzwitserloot
+ */
+public class ClassLoaderWorkaround {
+	static RuntimeException sneakyThrow(Throwable t) {
+		if ( t == null ) throw new NullPointerException("t");
+		ClassLoaderWorkaround.<RuntimeException>sneakyThrow0(t);
+		return null;
+	}
+	
+	@SuppressWarnings("unchecked")
+	private static <T extends Throwable> void sneakyThrow0(Throwable t) throws T {
+		throw (T)t;
+	}
+	
+	private static boolean initialized;
+	private static Method transform;
+	
+	public static void transformCompilationUnitDeclaration(Object parser, Object cud) throws Exception {
+		initialize(cud);
+		try {
+			transform.invoke(null, parser, cud);
+		} catch ( InvocationTargetException e ) {
+			throw sneakyThrow(e.getCause());
+		}
+	}
+	
+	private static void initialize(Object cud) throws ClassNotFoundException {
+		if ( initialized ) {
+			if ( transform == null ) throw new ClassNotFoundException("lombok.eclipse.TransformEclipseAST");
+			return;
+		}
+		
+		final ClassLoader parent = cud.getClass().getClassLoader();
+		ClassLoader loader = new ClassLoader() {
+			@Override public Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+				if ( name.startsWith("lombok.") ) {
+					InputStream in = ClassLoader.getSystemClassLoader().getResourceAsStream(name.replace(".", "/") + ".class");
+					ByteArrayOutputStream out = new ByteArrayOutputStream();
+					
+					byte[] b = new byte[65536];
+					try {
+						while ( true ) {
+							int r = in.read(b);
+							if ( r == -1 ) break;
+							if ( r > 0 ) out.write(b, 0, r);
+						}
+						
+						in.close();
+						byte[] data = out.toByteArray();
+						Class<?> result = defineClass(name, data, 0, data.length);
+						if ( resolve ) resolveClass(result);
+						return result;
+					} catch ( IOException e ) {
+						throw new ClassNotFoundException();
+					}
+				} else {
+					try {
+						Class<?> result = ClassLoader.getSystemClassLoader().loadClass(name);
+						if ( resolve ) resolveClass(result);
+						return result;
+					} catch ( ClassNotFoundException e ) {
+						Class<?> result = parent.loadClass(name);
+						if ( resolve ) resolveClass(result);
+						return result;
+					}
+				}
+			}
+		};
+		
+		try {
+			Class<?> c = loader.loadClass("lombok.eclipse.TransformEclipseAST");
+			for ( Method m : c.getMethods() ) {
+				if ( m.getName().equals("transform") ) {
+					Class<?>[] types = m.getParameterTypes();
+					if ( types.length != 2 ) continue;
+					if ( !types[0].getName().equals("org.eclipse.jdt.internal.compiler.parser.Parser") ) continue;
+					if ( !types[1].getName().equals("org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration") ) continue;
+					transform = m;
+					break;
+				}
+			}
+		} catch ( ClassNotFoundException ignore ) {}
+		initialized = true;
+	}
+}