001    /*
002     * The FML Forge Mod Loader suite.
003     * Copyright (C) 2012 cpw
004     *
005     * This library 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
006     * Software Foundation; either version 2.1 of the License, or any later version.
007     *
008     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
009     * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
010     *
011     * You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51
012     * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
013     */
014    
015    package cpw.mods.fml.common;
016    
017    import java.lang.reflect.Field;
018    import java.lang.reflect.Modifier;
019    import java.util.Set;
020    import java.util.logging.Level;
021    
022    import cpw.mods.fml.common.discovery.ASMDataTable;
023    import cpw.mods.fml.common.discovery.ASMDataTable.ASMData;
024    import cpw.mods.fml.relauncher.Side;
025    
026    /**
027     * @author cpw
028     *
029     */
030    public class ProxyInjector
031    {
032        public static void inject(ModContainer mod, ASMDataTable data, Side side)
033        {
034            FMLLog.fine("Attempting to inject @SidedProxy classes into %s", mod.getModId());
035            Set<ASMData> targets = data.getAnnotationsFor(mod).get(SidedProxy.class.getName());
036            ClassLoader mcl = Loader.instance().getModClassLoader();
037    
038            for (ASMData targ : targets)
039            {
040                try
041                {
042                    Class<?> proxyTarget = Class.forName(targ.getClassName(), true, mcl);
043                    Field target = proxyTarget.getDeclaredField(targ.getObjectName());
044                    if (target == null)
045                    {
046                        // Impossible?
047                        FMLLog.severe("Attempted to load a proxy type into %s.%s but the field was not found", targ.getClassName(), targ.getObjectName());
048                        throw new LoaderException();
049                    }
050    
051                    String targetType = side.isClient() ? target.getAnnotation(SidedProxy.class).clientSide() : target.getAnnotation(SidedProxy.class).serverSide();
052                    Object proxy=Class.forName(targetType, true, mcl).newInstance();
053    
054                    if ((target.getModifiers() & Modifier.STATIC) == 0 )
055                    {
056                        FMLLog.severe("Attempted to load a proxy type %s into %s.%s, but the field is not static", targetType, targ.getClassName(), targ.getObjectName());
057                        throw new LoaderException();
058                    }
059                    if (!target.getType().isAssignableFrom(proxy.getClass()))
060                    {
061                        FMLLog.severe("Attempted to load a proxy type %s into %s.%s, but the types don't match", targetType, targ.getClassName(), targ.getObjectName());
062                        throw new LoaderException();
063                    }
064                    target.set(null, proxy);
065                }
066                catch (Exception e)
067                {
068                    FMLLog.log(Level.SEVERE, e, "An error occured trying to load a proxy into %s.%s", targ.getAnnotationInfo(), targ.getClassName(), targ.getObjectName());
069                    throw new LoaderException(e);
070                }
071            }
072        }
073    }