Generalized the agent mechanism; now 1 lombok.jar can serve as the agent for BOTH netbeans AND eclipse, and is future-ready for an IntelliJ agent.

buildScripts/compile.ant.xml

@@ -159,8 +159,7 @@ lombok code including the various agents.
 			<fileset dir="build" includes="changelog.txt" />
 			<fileset dir="." includes="LICENCE" />
 			<manifest>
-<!--				<attribute name="Premain-Class" value="lombok.eclipse.agent.EclipsePatcher" /> -->
-				<attribute name="Premain-Class" value="lombok.netbeans.agent.NetbeansPatcher" />
+				<attribute name="Premain-Class" value="lombok.core.Agent" />
 				<attribute name="Can-Redefine-Classes" value="true" />
 				<attribute name="Main-Class" value="lombok.core.Main" />
 				<attribute name="Lombok-Version" value="${lombok.version}" />

src/core/lombok/core/Agent.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
+ * 
+ * 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.core;
+
+import java.lang.instrument.Instrumentation;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public abstract class Agent {
+	protected abstract void runAgent(String agentArgs, Instrumentation instrumentation, boolean injected) throws Exception;
+	
+	public static void agentmain(String agentArgs, Instrumentation instrumentation) throws Exception {
+		runAgents(agentArgs, instrumentation, true);
+	}
+	
+	public static void premain(String agentArgs, Instrumentation instrumentation) throws Exception {
+		runAgents(agentArgs, instrumentation, false);
+	}
+	
+	private static final List<String> AGENT_NAMES = Collections.unmodifiableList(Arrays.asList(
+			"lombok.netbeans.agent.NetbeansPatcher",
+			"lombok.eclipse.agent.EclipsePatcher"
+			));
+	
+	private static void runAgents(String agentArgs, Instrumentation instrumentation, boolean injected) throws Exception {
+		for (String agentName : AGENT_NAMES) {
+			try {
+				Class<?> agentClass = Class.forName(agentName);
+				Agent agent = (Agent) agentClass.newInstance();
+				agent.runAgent(agentArgs, instrumentation, injected);
+			} catch (ClassNotFoundException e) {
+				//That's okay - this lombok evidently is a version with support for something stripped out.
+			} catch (ClassCastException e) {
+				throw new InternalError("Lombok bug. Class: " + agentName + " is not an implementation of lombok.core.Agent");
+			} catch (IllegalAccessException e) {
+				throw new InternalError("Lombok bug. Class: " + agentName + " is not public");
+			} catch (InstantiationException e) {
+				throw new InternalError("Lombok bug. Class: " + agentName + " is not concrete or has no public no-args constructor");
+			}
+		}
+	}
+}

src/eclipseAgent/lombok/eclipse/agent/EclipsePatcher.java

@@ -26,6 +26,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 
+import lombok.core.Agent;
 import lombok.patcher.Hook;
 import lombok.patcher.MethodTarget;
 import lombok.patcher.ScriptManager;
@@ -41,15 +42,10 @@ import lombok.patcher.scripts.ScriptBuilder;
  * classes in this package for more information about which classes are transformed and how they are
  * transformed.
  */
-public class EclipsePatcher {
-	private EclipsePatcher() {}
-	
-	public static void agentmain(@SuppressWarnings("unused") String agentArgs, Instrumentation instrumentation) throws Exception {
-		registerPatchScripts(instrumentation, true);
-	}
-	
-	public static void premain(@SuppressWarnings("unused") String agentArgs, Instrumentation instrumentation) throws Exception {
-		registerPatchScripts(instrumentation, false);
+public class EclipsePatcher extends Agent {
+	@Override
+	public void runAgent(String agentArgs, Instrumentation instrumentation, boolean injected) throws Exception {
+		registerPatchScripts(instrumentation, injected);
 	}
 	
 	private static void registerPatchScripts(Instrumentation instrumentation, boolean reloadExistingClasses) {

src/netbeansAgent/lombok/netbeans/agent/NetbeansPatcher.java

@@ -23,29 +23,29 @@ package lombok.netbeans.agent;
 
 import java.lang.instrument.Instrumentation;
 
+import lombok.core.Agent;
 import lombok.patcher.Hook;
 import lombok.patcher.MethodTarget;
 import lombok.patcher.ScriptManager;
 import lombok.patcher.StackRequest;
-import lombok.patcher.equinox.EquinoxClassLoader;
 import lombok.patcher.scripts.ScriptBuilder;
 
-public class NetbeansPatcher {
-	private NetbeansPatcher() {}
-	
-	public static void agentmain(@SuppressWarnings("unused") String agentArgs, Instrumentation instrumentation) throws Exception {
-		registerPatchScripts(instrumentation, true);
-	}
-	
-	public static void premain(@SuppressWarnings("unused") String agentArgs, Instrumentation instrumentation) throws Exception {
-		registerPatchScripts(instrumentation, false);
+/**
+ * This is a java-agent that patches some of netbeans's classes so that lombok is initialized as Javac TaskListener,
+ * allowing us to change AST nodes anytime netbeans parses source code. It also fixes some of the places in netbeans that
+ * can't deal with generated code.
+ * 
+ * The hard work on figuring out where to patch has been done by Jan Lahoda (jlahoda@netbeans.org)
+ */
+public class NetbeansPatcher extends Agent {
+	@Override
+	public void runAgent(String agentArgs, Instrumentation instrumentation, boolean injected) throws Exception {
+		registerPatchScripts(instrumentation, injected);
 	}
 	
 	private static void registerPatchScripts(Instrumentation instrumentation, boolean reloadExistingClasses) {
 		ScriptManager sm = new ScriptManager();
 		sm.registerTransformer(instrumentation);
-		EquinoxClassLoader.addPrefix("lombok.");
-		EquinoxClassLoader.registerScripts(sm);
 		
 		patchNetbeansJavac(sm);
 		patchNetbeansMissingPositionAwareness(sm);

src/netbeansAgent/lombok/netbeans/agent/PatchFixes.java

@@ -48,16 +48,16 @@ public class PatchFixes {
 		if (context.get(TaskListener.class) != null)
 			context.put(TaskListener.class, (TaskListener)null);
 		if (taskListener != null) {
-//			try {
-//				Method m = JavacTaskImpl.class.getDeclaredMethod("wrap", TaskListener.class);
-//				try {
-//					m.setAccessible(true);
-//				} catch (SecurityException ignore) {}
-//				TaskListener w = (TaskListener)m.invoke(that, taskListener);
-				context.put(TaskListener.class, taskListener);
-//			} catch (InvocationTargetException e) {
-//				throw e.getCause();
-//			}
+			try {
+				Method m = JavacTaskImpl.class.getDeclaredMethod("wrap", TaskListener.class);
+				try {
+					m.setAccessible(true);
+				} catch (SecurityException ignore) {}
+				TaskListener w = (TaskListener)m.invoke(that, taskListener);
+				context.put(TaskListener.class, w);
+			} catch (InvocationTargetException e) {
+				throw e.getCause();
+			}
 		}
 	}