Some injecting classes now works

src/main/java/net/runelite/deob/ClassFile.java

@@ -295,4 +295,9 @@ public class ClassFile
 	{
 		return (this.access_flags & ACC_FINAL) != 0;
 	}
+
+	public void clearFinal()
+	{
+		this.access_flags &= ~ACC_FINAL;
+	}
 }

src/main/java/net/runelite/deob/injection/Inject.java

@@ -1,5 +1,6 @@
 package net.runelite.deob.injection;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Level;
@@ -118,6 +119,17 @@ public class Inject
 			if (implementingClass == null)
 				continue;
 
+			InjectReplace ij = new InjectReplace(cf, other);
+			try
+			{
+				ij.run();
+			}
+			catch (ClassNotFoundException | IOException ex)
+			{
+				ex.printStackTrace();
+				assert false;
+			}
+			
 			for (Field f : cf.getFields().getFields())
 			{
 				an = f.getAttributes().getAnnotations();

src/main/java/net/runelite/deob/injection/InjectReplace.java

@@ -74,12 +74,13 @@ public class InjectReplace
 
 		// set parent
 		classToInject.setParentClass(vanilla.getPoolClass());
-		assert !vanilla.isFinal();
+		vanilla.clearFinal(); // can't be final anymore now that we inherit from it
 		
 		injectConstructors(classToInject);
 
 		overideMethods(classToInject);
 
+		// find all classes which inherit from 'vanilla'. replace with classToInject
 		replaceSuperclass(classToInject);
 
 		replaceNew(classToInject);
@@ -228,11 +229,12 @@ public class InjectReplace
 
 	private void replaceSuperclass(ClassFile classToInject)
 	{
-		// find all classes which inherit from 'vanilla'. replace with classToInject
-
 		for (ClassFile cf : vanilla.getGroup().getClasses())
 			if (cf.getParentClass().equals(vanilla.getPoolClass()))
 			{
+				if (cf == classToInject) // of course this inherits from it.
+					continue;
+
 				cf.setParentClass(classToInject.getPoolClass());
 				
 				// adjust constructors
@@ -275,11 +277,13 @@ public class InjectReplace
 		// new vanilla -> new classToInject
 
 		for (ClassFile cf : vanilla.getGroup().getClasses())
-			if (cf.getParentClass().equals(vanilla.getPoolClass()))
-			{
 			for (Method m : cf.getMethods().getMethods())
 			{
 				Code code = m.getCode();
+
+				if (code == null)
+					continue;
+
 				Instructions ins = code.getInstructions();
 
 				boolean seen = false, isConstructor = m.getName().equals("<init>");
@@ -319,4 +323,3 @@ public class InjectReplace
 			}
 	}
 }
-}

src/test/java/net/runelite/deob/injection/InjectTest.java

@@ -3,7 +3,6 @@ package net.runelite.deob.injection;
 import java.io.File;
 import java.io.IOException;
 import net.runelite.deob.ClassGroup;
-import net.runelite.deob.runeloader.MappingImporter;
 import net.runelite.deob.util.JarUtil;
 import org.junit.After;
 import org.junit.Before;