From 8fa1741b621644ef84a9395a4c395d4ff3a89207 Mon Sep 17 00:00:00 2001
From: jeff
Date: Sat, 23 Aug 2014 23:43:31 -0400
Subject: moved all classes from the default package into a package called
 "default" so they can be properly imported by other classes

---
 src/cuchaz/enigma/bytecode/ClassRenamer.java | 115 +++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/cuchaz/enigma/bytecode/ClassRenamer.java

(limited to 'src/cuchaz/enigma/bytecode/ClassRenamer.java')

diff --git a/src/cuchaz/enigma/bytecode/ClassRenamer.java b/src/cuchaz/enigma/bytecode/ClassRenamer.java
new file mode 100644
index 0000000..cba5861
--- /dev/null
+++ b/src/cuchaz/enigma/bytecode/ClassRenamer.java
@@ -0,0 +1,115 @@
+/*******************************************************************************
+ * Copyright (c) 2014 Jeff Martin.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the GNU Public License v3.0
+ * which accompanies this distribution, and is available at
+ * http://www.gnu.org/licenses/gpl.html
+ * 
+ * Contributors:
+ *     Jeff Martin - initial API and implementation
+ ******************************************************************************/
+package cuchaz.enigma.bytecode;
+
+import java.util.Map;
+import java.util.Set;
+
+import javassist.ClassMap;
+import javassist.CtClass;
+import javassist.bytecode.ConstPool;
+import javassist.bytecode.Descriptor;
+import javassist.bytecode.InnerClassesAttribute;
+
+import com.beust.jcommander.internal.Sets;
+import com.google.common.collect.Maps;
+
+import cuchaz.enigma.mapping.ClassEntry;
+
+public class ClassRenamer
+{
+	public static void renameClasses( CtClass c, Map<ClassEntry,ClassEntry> map )
+	{
+		// build the map used by javassist
+		ClassMap nameMap = new ClassMap();
+		for( Map.Entry<ClassEntry,ClassEntry> entry : map.entrySet() )
+		{
+			nameMap.put( entry.getKey().getName(), entry.getValue().getName() );
+		}
+		c.replaceClassName( nameMap );
+		
+		// translate the names in the InnerClasses attribute
+		ConstPool constants = c.getClassFile().getConstPool();
+		InnerClassesAttribute attr = (InnerClassesAttribute)c.getClassFile().getAttribute( InnerClassesAttribute.tag );
+		if( attr != null )
+		{
+			for( int i=0; i<attr.tableLength(); i++ )
+			{
+				ClassEntry inClassEntry = new ClassEntry( Descriptor.toJvmName( attr.innerClass( i ) ) );
+				ClassEntry outClassEntry = map.get( inClassEntry );
+				attr.setInnerClassIndex( i, constants.addClassInfo( outClassEntry.getName() ) );
+				if( attr.outerClassIndex( i ) != 0 )
+				{
+					attr.setOuterClassIndex( i, constants.addClassInfo( outClassEntry.getOuterClassName() ) );
+				}
+				if( attr.innerNameIndex( i ) != 0 )
+				{
+					attr.setInnerNameIndex( i, constants.addUtf8Info( outClassEntry.getInnerClassName() ) );
+				}
+				
+				/* DEBUG
+				System.out.println( String.format( "\tOBF: %s DEOBF: %s-> ATTR: %s,%s,%s",
+					obfClassEntry, deobfClassEntry,
+					attr.outerClass( i ),
+					attr.innerClass( i ),
+					attr.innerName( i )
+				) );
+				*/
+			}
+		}
+	}
+	
+	public static Set<ClassEntry> getAllClassEntries( CtClass c )
+	{
+		// get the classes that javassist knows about
+		final Set<ClassEntry> entries = Sets.newHashSet();
+		ClassMap map = new ClassMap( )
+		{
+			@Override
+			public Object get( Object obj )
+			{
+				if( obj instanceof String )
+				{
+					entries.add( new ClassEntry( (String)obj ) );
+				}
+				return null;
+			}
+			private static final long serialVersionUID = -202160293602070641L;
+		};
+		c.replaceClassName( map );
+		
+		// also check InnerClassesAttribute
+		InnerClassesAttribute attr = (InnerClassesAttribute)c.getClassFile().getAttribute( InnerClassesAttribute.tag );
+		if( attr != null )
+		{
+			for( int i=0; i<attr.tableLength(); i++ )
+			{
+				entries.add( new ClassEntry( Descriptor.toJvmName( attr.innerClass( i ) ) ) );
+			}
+		}
+		
+		return entries;
+	}
+	
+	public static void moveAllClassesOutOfDefaultPackage( CtClass c, String newPackageName )
+	{
+		// rename all classes
+		Map<ClassEntry,ClassEntry> map = Maps.newHashMap();
+		for( ClassEntry classEntry : ClassRenamer.getAllClassEntries( c ) )
+		{
+			if( classEntry.isInDefaultPackage() )
+			{
+				map.put( classEntry, new ClassEntry( newPackageName + "/" + classEntry.getName() ) );
+			}
+		}
+		ClassRenamer.renameClasses( c, map );
+	}
+}
-- 
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