Fix classloading issues

Fixes 1.16 loading from 1.15.2

build.gradle

@@ -13,7 +13,7 @@ apply plugin: 'net.minecraftforge.gradle'
 apply plugin: 'eclipse'
 apply plugin: 'maven-publish'
 
-version = '1.0.6'
+version = '1.0.7'
 group = 'link.infra.jumploader' // http://maven.apache.org/guides/mini/guide-naming-conventions.html
 archivesBaseName = 'jumploader'
 

gradle.properties

@@ -1,3 +1,3 @@
 modGroup=link.infra.jumploader
-modVersion=1.0.6
+modVersion=1.0.7
 modBaseName=jumploader

src/main/java/link/infra/jumploader/Jumploader.java

@@ -35,7 +35,7 @@
 import java.util.Set;
 
 public class Jumploader implements ITransformationService {
-	public static final String VERSION = "1.0.6";
+	public static final String VERSION = "1.0.7";
 	public static final String USER_AGENT = "Jumploader/" + VERSION;
 
 	private final Logger LOGGER = LogManager.getLogger();

src/main/java/link/infra/jumploader/JumploaderClassLoader.java

@@ -64,6 +64,22 @@ protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundE
 				}
 			}
 		}
-		return super.loadClass(name, resolve);
+		// Prioritise classes from self to parent classloader
+		synchronized (getClassLoadingLock(name)) {
+			Class<?> c = findLoadedClass(name);
+			if (c == null) {
+				try {
+					// Try to find from self
+					c = findClass(name);
+				} catch (ClassNotFoundException e) {
+					// If it failed, try the parent classloader
+					return super.loadClass(name, resolve);
+				}
+			}
+			if (resolve) {
+				resolveClass(c);
+			}
+			return c;
+		}
 	}
 }

src/main/resources/fabric.mod.json

@@ -1,7 +1,7 @@
 {
   "schemaVersion": 1,
   "id": "jumploader",
-  "version": "1.0.6",
+  "version": "1.0.7",
 
   "name": "Jumploader",
   "description": "Allows the use of Fabric mods in Twitch modpacks, by loading Fabric as if it were a Forge mod.",