OreGenerationEvent

package com.genuineflix.co.events;

import java.lang.reflect.Field;

import net.minecraft.block.Block;
import net.minecraft.world.gen.feature.WorldGenMinable;
import net.minecraftforge.event.terraingen.OreGenEvent;

import com.genuineflix.co.generator.feature.CommonGenMinable;
import com.genuineflix.co.registry.MetalRegistry;

import cpw.mods.fml.common.eventhandler.Event.Result;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;

public class OreGenerationEvent {

    public static final Field blockField = WorldGenMinable.class.getDeclaredFields()[0];

    // Blocking ores from being able to generate
    @SubscribeEvent
    public void minable(final OreGenEvent.GenerateMinable event) {
        if (event.generator == null || event.generator instanceof CommonGenMinable)
            return;
        if (event.generator instanceof WorldGenMinable)
            try {
                final WorldGenMinable gen = (WorldGenMinable) event.generator;
                final Block block = (Block) blockField.get(event.generator);
                if (block != null && MetalRegistry.isCommon(block))
                    event.setResult(Result.DENY);
            }
            catch (final Exception e) {
                e.printStackTrace();
            }
    }

    static {
        blockField.setAccessible(true);
    }
}