@SideOnly @Mod's

/*
 * Forge Mod Loader
 * Copyright (c) 2012-2013 cpw.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Contributors:
 *     cpw - implementation
 */

package cpw.mods.fml.common;

import java.io.File;
import java.util.regex.Pattern;

import org.objectweb.asm.Type;

import cpw.mods.fml.common.discovery.ModCandidate;
import cpw.mods.fml.common.discovery.asm.ASMModParser;
import cpw.mods.fml.common.discovery.asm.ModAnnotation;
import cpw.mods.fml.common.discovery.asm.ModAnnotation.EnumHolder;
import cpw.mods.fml.common.modloader.ModLoaderModContainer;
import cpw.mods.fml.relauncher.SideOnly;

public class ModContainerFactory
{
    private static Pattern modClass = Pattern.compile(".*(\\.|)(mod\\_[^\\s$]+)$");
    private static ModContainerFactory INSTANCE = new ModContainerFactory();
    public static ModContainerFactory instance() {
        return INSTANCE;
    }
    public ModContainer build(ASMModParser modParser, File modSource, ModCandidate container)
    {
        String className = modParser.getASMType().getClassName();
        if (modParser.isBaseMod(container.getRememberedBaseMods()) && modClass.matcher(className).find())
        {
            FMLLog.fine("Identified a BaseMod type mod %s", className);
            return new ModLoaderModContainer(className, modSource, modParser.getBaseModProperties());
        }
        else if (modClass.matcher(className).find())
        {
            FMLLog.fine("Identified a class %s following modloader naming convention but not directly a BaseMod or currently seen subclass", className);
            container.rememberModCandidateType(modParser);
        }
        else if (modParser.isBaseMod(container.getRememberedBaseMods()))
        {
            FMLLog.fine("Found a basemod %s of non-standard naming format", className);
            container.rememberBaseModType(className);
        }

        // We warn if it's not a basemod instance -- compatibility requires it to be in net.minecraft.src *sigh*
        if (className.startsWith("net.minecraft.src.") && container.isClasspath() && !container.isMinecraftJar())
        {
            FMLLog.severe("FML has detected a mod that is using a package name based on 'net.minecraft.src' : %s. This is generally a severe programming error. "
                    + " There should be no mod code in the minecraft namespace. MOVE YOUR MOD! If you're in eclipse, select your source code and 'refactor' it into "
                    + "a new package. Go on. DO IT NOW!",className);
        }

        ModAnnotation modAnn = null;
        boolean badSide = false;
        for (ModAnnotation ann : modParser.getAnnotations())
        {
            if (ann.getASMType().equals(Type.getType(Mod.class)))
            {
                modAnn = ann;
            }
            else if ( ann.getASMType().equals( Type.getType( SideOnly.class ) ) )
            {
                EnumHolder side = ( EnumHolder ) ann.getValues().get( "value" );
                if ( !side.value.equals( FMLCommonHandler.instance().getSide().name() ) )
                {
                    badSide = true;
                }
            }
        }

        if ( modAnn != null && !badSide )
        {
            FMLLog.fine("Identified an FMLMod type mod %s", className);
            return new FMLModContainer(className, modSource, modAnn.getValues());
        }

        return null;
    }
}