Applied-Energistics-2/src/main/java/appeng/util/inv/BlockingInventoryAdaptor.java

package appeng.util.inv;

import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;


public abstract class BlockingInventoryAdaptor implements Iterable<ItemSlot> {
    public static BlockingInventoryAdaptor getAdaptor(final TileEntity te, final EnumFacing d) {
        if (te != null && te.hasCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, d)) {
            // Attempt getting an IItemHandler for the given side via caps
            IItemHandler itemHandler = te.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, d);
            if (itemHandler != null) {
                return new BlockingItemHandler(itemHandler, te.getBlockType().getRegistryName().getNamespace());
            }
        }
        return null;
    }

    public abstract boolean containsBlockingItems();
}