package appeng.transformer.asm;
import java.util.Iterator;
import java.util.List;
import net.minecraft.launchwrapper.IClassTransformer;
import org.apache.logging.log4j.Level;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.AnnotationNode;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.MethodNode;
import appeng.integration.IntegrationRegistry;
import appeng.integration.IntegrationType;
import appeng.transformer.annotations.integration;
import cpw.mods.fml.relauncher.FMLRelaunchLog;
public class ASMIntegration implements IClassTransformer
{
private final IntegrationRegistry integrationModules = new IntegrationRegistry();
public ASMIntegration() {
/**
* Side, Display Name, ModID ClassPostFix
*/
for ( IntegrationType type : IntegrationType.values() )
{
integrationModules.add( type );
}
// integrationModules.add( IntegrationSide.BOTH, "Thermal Expansion", "ThermalExpansion", IntegrationType.TE );
// integrationModules.add( IntegrationSide.BOTH, "Mystcraft", "Mystcraft", IntegrationType.Mystcraft );
// integrationModules.add( IntegrationSide.BOTH, "Greg Tech", "gregtech_addon", IntegrationType.GT );
// integrationModules.add( IntegrationSide.BOTH, "Universal Electricity", null, IntegrationType.UE );
// integrationModules.add( IntegrationSide.BOTH, "Logistics Pipes", "LogisticsPipes|Main", IntegrationType.LP );
// integrationModules.add( IntegrationSide.BOTH, "Better Storage", IntegrationType.betterstorage );
// integrationModules.add( IntegrationSide.BOTH, "Forestry", "Forestry", IntegrationType.Forestry );
// integrationModules.add( IntegrationSide.BOTH, "Mekanism", "Mekanism", IntegrationType.Mekanism );
}
@Override
public byte[] transform(String name, String transformedName, byte[] basicClass)
{
if ( basicClass == null || transformedName.startsWith( "appeng.transformer" ) )
return basicClass;
if ( transformedName.startsWith( "appeng." ) )
{
// log( "Found " + transformedName );
ClassNode classNode = new ClassNode();
ClassReader classReader = new ClassReader( basicClass );
classReader.accept( classNode, 0 );
try
{
boolean reWrite = removeOptionals( classNode );
if ( reWrite )
{
ClassWriter writer = new ClassWriter( ClassWriter.COMPUTE_MAXS );
classNode.accept( writer );
return writer.toByteArray();
}
}
catch (Throwable t)
{
t.printStackTrace();
}
}
return basicClass;
}
private boolean removeOptionals(ClassNode classNode)
{
boolean changed = false;
if ( classNode.visibleAnnotations != null )
{
for (AnnotationNode an : classNode.visibleAnnotations)
{
if ( hasAnnotation( an, integration.Interface.class ) )
{
if ( stripInterface( classNode, integration.Interface.class, an ) )
changed = true;
}
else if ( hasAnnotation( an, integration.InterfaceList.class ) )
{
for (Object o : ((List) an.values.get( 1 )))
{
if ( stripInterface( classNode, integration.InterfaceList.class, (AnnotationNode) o ) )
changed = true;
}
}
}
}
Iterator<MethodNode> i = classNode.methods.iterator();
while (i.hasNext())
{
MethodNode mn = i.next();
if ( mn.visibleAnnotations != null )
{
for (AnnotationNode an : mn.visibleAnnotations)
{
if ( hasAnnotation( an, integration.Method.class ) )
{
if ( stripMethod( classNode, mn, i, integration.Method.class, an ) )
changed = true;
}
}
}
}
if ( changed )
log( "Updated " + classNode.name );
return changed;
}
private boolean hasAnnotation(AnnotationNode ann, Class annotation)
{
return ann.desc.equals( Type.getDescriptor( annotation ) );
}
private boolean stripMethod(ClassNode classNode, MethodNode mn, Iterator<MethodNode> i, Class class1, AnnotationNode an)
{
if ( an.values.size() != 2 )
throw new RuntimeException( "Unable to handle Method annotation on " + classNode.name );
String iName = null;
if ( an.values.get( 0 ).equals( "iname" ) )
iName = (String) an.values.get( 1 );
if ( iName != null )
{
IntegrationType type = IntegrationType.valueOf( iName );
if ( !IntegrationRegistry.instance.isEnabled( type ) )
{
log( "Removing Method " + mn.name + " from " + classNode.name + " because " + iName + " integration is disabled." );
i.remove();
return true;
}
else
log( "Allowing Method " + mn.name + " from " + classNode.name + " because " + iName + " integration is enabled." );
}
else
throw new RuntimeException( "Unable to handle Method annotation on " + classNode.name );
return false;
}
private boolean stripInterface(ClassNode classNode, Class class1, AnnotationNode an)
{
if ( an.values.size() != 4 )
throw new RuntimeException( "Unable to handle Interface annotation on " + classNode.name );
String iFace = null;
String iName = null;
if ( an.values.get( 0 ).equals( "iface" ) )
iFace = (String) an.values.get( 1 );
else if ( an.values.get( 2 ).equals( "iface" ) )
iFace = (String) an.values.get( 3 );
if ( an.values.get( 0 ).equals( "iname" ) )
iName = (String) an.values.get( 1 );
else if ( an.values.get( 2 ).equals( "iname" ) )
iName = (String) an.values.get( 3 );
IntegrationType type = IntegrationType.valueOf( iName );
if ( iName != null && iFace != null )
{
if ( !IntegrationRegistry.instance.isEnabled( type ) )
{
log( "Removing Interface " + iFace + " from " + classNode.name + " because " + iName + " integration is disabled." );
classNode.interfaces.remove( iFace.replace( '.', '/' ) );
return true;
}
else
log( "Allowing Interface " + iFace + " from " + classNode.name + " because " + iName + " integration is enabled." );
}
else
throw new RuntimeException( "Unable to handle Method annotation on " + classNode.name );
return false;
}
private void log(String string)
{
FMLRelaunchLog.log( "AE2-CORE", Level.INFO, string );
}
}