Backport project to support java 8

build.gradle

@@ -9,17 +9,17 @@ repositories {
 }
 
 dependencies {
-	implementation 'com.google.code.gson:gson:2.10.1'
+  implementation 'com.google.code.gson:gson:2.10.1'
 	implementation 'org.ow2.asm:asm:9.6'
-	testImplementation 'org.junit.jupiter:junit-jupiter:5.10.1'
 }
 
 test {
 	useJUnitPlatform()
 }
 
 compileJava {
-	options.release = 17
+  options.release = 8
+  options.deprecation = true
 }
 
 def buildNumber = System.getenv('AI_BUILD_NUMBER')
@@ -54,9 +54,14 @@ processResources {
 }
 
 shadowJar {
-	exclude 'META-INF/maven/**'
-	exclude 'module-info.class'
-	exclude '**/module-info.class'
+  archiveClassifier.set(null)
+
+  exclude 'META-INF/maven/**'
+  exclude 'module-info.class'
+  exclude '**/module-info.class'
+
+  relocate 'com.google.gson', 'xyz.zuoyx.multiyggdrasil.internal.com.google.gson'
+  relocate 'org.objectweb.asm', 'xyz.zuoyx.multiyggdrasil.internal.org.objectweb.asm'
 }
 
 defaultTasks 'clean', 'shadowJar'

gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

src/main/java/xyz/zuoyx/multiyggdrasil/Config.java

@@ -74,14 +74,14 @@ private static void initDebugOptions() {
 		} else {
 			for (String option : prop.split(",")) {
 				switch (option) {
-					case "verbose" -> verboseLogging = true;
-					case "authlib" -> authlibLogging = true;
-					case "printUntransformed" -> {
+					case "verbose": verboseLogging = true;
+					case "authlib": authlibLogging = true;
+					case "printUntransformed": {
 						printUntransformedClass = true;
 						verboseLogging = true;
 					}
-					case "dumpClass" -> dumpClass = true;
-					default -> {
+					case "dumpClass": dumpClass = true;
+					default: {
 						log(ERROR, "Unrecognized debug option: " + option);
 						throw new InitializationException();
 					}
@@ -131,13 +131,12 @@ private static void initMojangProxy() {
 		int port = Integer.parseInt(matcher.group("port"));
 
 		switch (protocol) {
-			case "socks" -> mojangProxy = new Proxy(Type.SOCKS, new InetSocketAddress(host, port));
-			default -> {
+			case "socks": mojangProxy = new Proxy(Type.SOCKS, new InetSocketAddress(host, port));
+			default: {
 				log(ERROR, "Unsupported proxy protocol: " + protocol);
 				throw new InitializationException();
 			}
 		}
-		log(INFO, "Mojang proxy: " + mojangProxy);
 	}
 
 	private static FeatureOption parseFeatureOption(String property) {

src/main/java/xyz/zuoyx/multiyggdrasil/httpd/MultiQueryProfileFilter.java

@@ -61,7 +61,7 @@ public void handle(String domain, String path, HttpExchange exchange) throws Uns
 		if (!matcher.find())
 			throw new UnsupportedURLException();
 
-		UUID uuid;
+    		UUID uuid;
 		try {
 			uuid = fromUnsignedUUID(matcher.group("uuid"));
 		} catch (IllegalArgumentException e) {
@@ -78,9 +78,9 @@ public void handle(String domain, String path, HttpExchange exchange) throws Uns
 		Optional<GameProfile> response;
 		if (uuid.version() == 4) {
 			response = mojangClient.queryProfile(uuid, withSignature);
-		} else {
+      		} else {
 			response = customClient.queryProfile(uuid, withSignature);
-			response.ifPresent(profile -> profile.name = new NamespacedID(profile.name, namespace).toString());
+      			response.ifPresent(profile -> profile.name = new NamespacedID(profile.name, namespace).toString());
 		}
 
 		if (response.isPresent()) {

src/main/java/xyz/zuoyx/multiyggdrasil/transform/ClassTransformer.java

@@ -143,7 +143,7 @@ public void accept(TransformUnit... units) {
 			for (int i = units.length - 1; i >= 0; i--) {
 				TransformContextImpl ctx = new TransformContextImpl();
 				Optional<ClassVisitor> visitor = units[i].transform(classLoader, className, chain, ctx);
-				if (visitor.isEmpty())
+				if (!visitor.isPresent())
 					continue;
 				ctxs[i] = ctx;
 				chain = visitor.get();
@@ -287,7 +287,7 @@ public byte[] transform(ClassLoader loader, String internalClassName, Class<?> c
 				handle.accept(unitsArray);
 
 				Optional<byte[]> transformResult = handle.finish();
-				if (Config.printUntransformedClass && transformResult.isEmpty()) {
+				if (Config.printUntransformedClass && !transformResult.isPresent()) {
 					log(DEBUG, "No transformation is applied to [" + className + "]");
 				}
 

src/main/java/xyz/zuoyx/multiyggdrasil/transform/LdcTransformUnit.java

@@ -58,17 +58,18 @@ public void visitLdcInsn(Object cst) {
 						}
 					}
 
-					@Override
-					public void visitInvokeDynamicInsn(String name, String descriptor, Handle bootstrapMethodHandle, Object... bootstrapMethodArguments) {
-						for (int i = 0; i < bootstrapMethodArguments.length; i++) {
-							if (bootstrapMethodArguments[i] instanceof String constant) {
-								Optional<String> transformed = transformLdc(constant);
-								if (transformed.isPresent() && !transformed.get().equals(constant)) {
-									ctx.markModified();
-									bootstrapMethodArguments[i] = transformed.get();
-								}
-							}
-						}
+          @Override
+          public void visitInvokeDynamicInsn(String name, String descriptor, Handle bootstrapMethodHandle, Object... bootstrapMethodArguments) {
+              for (int i = 0; i < bootstrapMethodArguments.length; i++) {
+                  if (bootstrapMethodArguments[i] instanceof String) {
+                      String constant = (String) bootstrapMethodArguments[i];
+                      Optional<String> transformed = transformLdc(constant);
+                      if (transformed.isPresent() && !transformed.get().equals(constant)) {
+                          ctx.markModified();
+                          bootstrapMethodArguments[i] = transformed.get();
+                      }
+                  }
+              }
 						super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
 					}
 				};

src/main/java/xyz/zuoyx/multiyggdrasil/util/JsonUtils.java

@@ -28,37 +28,37 @@
 
 public final class JsonUtils {
 
-	private static final Gson gson = new Gson();
+    private static final Gson gson = new Gson();
 
-	public static JsonElement parseJson(String jsonText) {
-		return JsonParser.parseString(jsonText);
-	}
+    public static JsonElement parseJson(String jsonText) {
+        return JsonParser.parseString(jsonText);
+    }
 
-	public static String toJsonString(Object json) {
-		return gson.toJson(json);
-	}
+    public static String toJsonString(Object json) {
+        return gson.toJson(json);
+    }
 
-	public static String asJsonString(JsonElement json) {
-		return json.getAsJsonPrimitive().getAsString();
-	}
-	public static boolean asBoolean(JsonElement json) {
-		if (json != null) {
-			return json.getAsJsonPrimitive().getAsBoolean();
-		} else {
-			return false;
-		}
-	}
+    public static String asJsonString(JsonElement json) {
+        return json.getAsJsonPrimitive().getAsString();
+    }
+    public static boolean asBoolean(JsonElement json) {
+        if (json != null) {
+            return json.getAsJsonPrimitive().getAsBoolean();
+        } else {
+            return false;
+        }
+    }
 
-	public static List<JsonElement> toJavaList(JsonArray json) {
-		Type listType = new TypeToken<List<JsonElement>>(){}.getType();
-		return gson.fromJson(json, listType);
-	}
+    public static List<JsonElement> toJavaList(JsonArray json) {
+        Type listType = new TypeToken<List<JsonElement>>(){}.getType();
+        return gson.fromJson(json, listType);
+    }
 
-	public static Map<String, JsonElement> toJavaMap(JsonObject json) {
-		Type mapType = new TypeToken<Map<String, JsonElement>>(){}.getType();
-		return gson.fromJson(json, mapType);
-	}
+    public static Map<String, JsonElement> toJavaMap(JsonObject json) {
+        Type mapType = new TypeToken<Map<String, JsonElement>>(){}.getType();
+        return gson.fromJson(json, mapType);
+    }
 
-	private JsonUtils() {}
+    private JsonUtils() {}
 
-}
+}

src/main/java/xyz/zuoyx/multiyggdrasil/util/UnsupportedURLException.java

@@ -16,25 +16,22 @@
  */
 package xyz.zuoyx.multiyggdrasil.util;
 
-import java.io.Serial;
-
 public class UnsupportedURLException extends Exception {
-    @Serial
     private static final long serialVersionUID = 7895188952767140345L;
 
     public UnsupportedURLException() {
-        this(null, null);
+        super();
     }
 
     public UnsupportedURLException(String message) {
-        this(message, null);
+        super(message);
     }
 
     public UnsupportedURLException(String message, Throwable cause) {
-        super(message, cause, false, false);
+        super(message, cause);
     }
 
     public UnsupportedURLException(Throwable cause) {
-        this(null, cause);
+        super(cause);
     }
 }

src/main/java/xyz/zuoyx/multiyggdrasil/yggdrasil/NamespacedID.java

@@ -93,7 +93,8 @@ public String toString() {
 
     @Override
     public boolean equals(Object obj) {
-        if (obj instanceof NamespacedID other) {
+        if (obj instanceof NamespacedID) {
+            NamespacedID other = (NamespacedID) obj;
             return this.namespace.equals(other.namespace) && this.id.equals(other.id);
         }
         return false;