IItemHandlerContainer.java

package gigaherz.enderRift.common.container;

import net.minecraft.item.ItemStack;

public interface IItemHandlerContainer
{
    boolean isItemValidForSlot(int slot, ItemStack stack);
    int getInventoryStackLimit(int slot);
}

ItemStackHandlerContainer.java

package gigaherz.enderRift.common.container;

import net.minecraft.item.ItemStack;
import net.minecraftforge.items.ItemStackHandler;

public class ItemStackHandlerContainer extends ItemStackHandler implements IItemHandlerContainer
{
    public ItemStackHandlerContainer()
    {
        super();
    }

    public ItemStackHandlerContainer(int slots)
    {
        super(slots);
    }

    @Override
    public boolean isItemValidForSlot(int slot, ItemStack stack)
    {
        return true;
    }

    @Override
    public int getInventoryStackLimit(int slot)
    {
        return 64;
    }
}

SlotItemHandlerContainer.java

package gigaherz.enderRift.common.container;

import net.minecraft.item.ItemStack;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.SlotItemHandler;

public class SlotItemHandlerContainer extends SlotItemHandler
{
    public SlotItemHandlerContainer(IItemHandler itemHandler, int index, int xPosition, int yPosition)
    {
        super(itemHandler, index, xPosition, yPosition);
    }

    @Override
    public boolean isItemValid(ItemStack stack)
    {
        IItemHandler itemHandler = getItemHandler();
        if (itemHandler instanceof IItemHandlerContainer)
            return ((IItemHandlerContainer) itemHandler).isItemValidForSlot(slotNumber, stack);
        return super.isItemValid(stack);
    }

    @Override
    public int getSlotStackLimit()
    {
        IItemHandler itemHandler = getItemHandler();
        if (itemHandler instanceof IItemHandlerContainer)
            return ((IItemHandlerContainer) itemHandler).getInventoryStackLimit(slotNumber);
        return 64;
    }

    @Override
    public int getItemStackLimit(ItemStack stack)
    {
        return getSlotStackLimit();
    }

}