InventoryFactory.java

package crazypants.enderio.machine.invpanel.server;

import com.jaquadro.minecraft.storagedrawers.api.storage.IDrawerGroup;
import cpw.mods.fml.common.Loader;
import crazypants.enderio.conduit.item.NetworkedInventory;
import java.util.ArrayList;
import net.minecraft.inventory.ISidedInventory;
import powercrystals.minefactoryreloaded.api.IDeepStorageUnit;

public abstract class InventoryFactory {

  private static final ArrayList<InventoryFactory> factories;

  static {
    factories = new ArrayList<InventoryFactory>();
    factories.add(new DSUFactory());
    if (Loader.isModLoaded("StorageDrawers")) {
      factories.add(new DrawerFactory());
    }
  }

  static AbstractInventory createInventory(NetworkedInventory ni) {
    for(InventoryFactory f : factories) {
      AbstractInventory ai = f.create(ni);
      if (ai != null) {
        return ai;
      }
    }
    return new NormalInventory(ni);
  }

  abstract AbstractInventory create(NetworkedInventory ni);

  static class DSUFactory extends InventoryFactory {
    @Override
    AbstractInventory create(NetworkedInventory ni) {
      ISidedInventory inv = ni.getInventory();
      if (inv instanceof IDeepStorageUnit) {
        return new DSUInventory((IDeepStorageUnit) inv);
      }
      return null;
    }
  }

  static class DrawerFactory extends InventoryFactory {
    @Override
    AbstractInventory create(NetworkedInventory ni) {
      ISidedInventory inv = ni.getInventory();
      if (inv instanceof IDrawerGroup) {
        return new DrawerGroupInventory((IDrawerGroup) inv);
      }
      return null;
    }
  }
}