From f453fd197666298ba702266201ca7dcabb50ee14 Mon Sep 17 00:00:00 2001
From: xsun <1563770452@qq.com>
Date: Tue, 7 Mar 2017 21:04:06 +0800
Subject: [PATCH] fix the bug that may crash the game when there is a mod
 including a old AE2 api class bytecode, such as TT, completely.

---
 .../java/appeng/transformer/AppEngCore.java   |  2 +-
 .../appeng/transformer/asm/ASMApiFixer.java   | 86 +++++++++++++++++++
 2 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/appeng/transformer/asm/ASMApiFixer.java

diff --git a/src/main/java/appeng/transformer/AppEngCore.java b/src/main/java/appeng/transformer/AppEngCore.java
index 5a07faff..b561417f 100644
--- a/src/main/java/appeng/transformer/AppEngCore.java
+++ b/src/main/java/appeng/transformer/AppEngCore.java
@@ -64,7 +64,7 @@ public final class AppEngCore extends DummyModContainer implements IFMLLoadingPl
 	@Override
 	public String[] getASMTransformerClass()
 	{
-		return new String[] { "appeng.transformer.asm.ASMIntegration" };
+		return new String[] { "appeng.transformer.asm.ASMIntegration", "appeng.transformer.asm.ASMApiFixer" };
 	}
 
 	@Override
diff --git a/src/main/java/appeng/transformer/asm/ASMApiFixer.java b/src/main/java/appeng/transformer/asm/ASMApiFixer.java
new file mode 100644
index 00000000..fa0700a0
--- /dev/null
+++ b/src/main/java/appeng/transformer/asm/ASMApiFixer.java
@@ -0,0 +1,86 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.transformer.asm;
+
+
+import appeng.helpers.Reflected;
+import cpw.mods.fml.relauncher.FMLRelaunchLog;
+import net.minecraft.launchwrapper.IClassTransformer;
+import org.apache.commons.io.FileUtils;
+import org.apache.logging.log4j.Level;
+
+import java.io.BufferedInputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.JarURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+
+
+/*
+ * It is a ClassTransformer which can transformer the older AE2 api class that some addons including,
+ * which can occur the crash due to java.lang.NoSuchMethodError.
+ * See also : https://github.com/xsun2001/Applied-Energistics-2-Unofficial/issues/1
+ */
+@Reflected
+public class ASMApiFixer implements IClassTransformer
+{
+
+	public ASMApiFixer()
+	{
+		FMLRelaunchLog.log( "AE2-ApiFixer", Level.INFO, "ApiFixer Installed" );
+		FMLRelaunchLog.log( "AE2-ApiFixer", Level.INFO, "%s", getClass().getResource( "" ).toString() );
+	}
+
+	@Override public byte[] transform( String name, String transformedName, byte[] basicClass )
+	{
+		if( transformedName.startsWith( "appeng.api" ) )
+		{
+			FMLRelaunchLog.log( "AE2-ApiFixer", Level.INFO, "Fixing api class file:%s", transformedName );
+			try
+			{
+				String clazzurl = getClass().getResource( "" ).toString();
+				clazzurl = clazzurl.substring( 0, clazzurl.length() - 23 ) + transformedName.replace( '.', '/' ) + ".class";
+				//23 is "appeng/transformer/asm"'s length + 1
+				FMLRelaunchLog.log( "AE2-ApiFixer", Level.INFO, "Fixing...:%s", clazzurl );
+				URL url = new URL( clazzurl );
+				URLConnection connection = url.openConnection();
+				byte[] bytes = new byte[connection.getContentLength()];
+				if( connection.getInputStream().read( bytes ) == -1 )
+				{
+					FMLRelaunchLog.log( "AE2-ApiFixer", Level.ERROR, "Cannot fix:%s", transformedName );
+					return basicClass;
+				}
+				else
+				{
+					FMLRelaunchLog.log( "AE2-ApiFixer", Level.INFO, "Fix success:%s", transformedName );
+					return bytes;
+				}
+			}
+			catch( Exception e )
+			{
+				FMLRelaunchLog.log( "AE2-ApiFixer", Level.ERROR, "Fix failed:%s|%s", transformedName, e.getClass().getName() );
+				return basicClass;
+			}
+		}
+		return basicClass;
+	}
+}