EnergyUtil.java

package chbachman.armour.util;

import net.minecraft.item.ItemStack;
import cofh.api.energy.IEnergyContainerItem;
import cofh.lib.util.helpers.EnergyHelper;

public class EnergyUtil {

    public static IEnergyContainerItem getItem(ItemStack stack) {
        if (EnergyHelper.isEnergyContainerItem(stack)) {
            return (IEnergyContainerItem) stack.getItem();
        }
        return null;
    }

    public static int getEnergyStored(ItemStack stack) {
        if (EnergyHelper.isEnergyContainerItem(stack)) {
            return ((IEnergyContainerItem) stack.getItem()).getEnergyStored(stack);
        }
        return 0;
    }

    /**
     * Is the enrgy in the stack depleted
     * 
     * @param stack
     * @return whether the stack is depeleted, or false if it does not contain
     *         any energy.
     */
    public static boolean isEmpty(ItemStack stack) {
        if (EnergyHelper.isEnergyContainerItem(stack)) {

            IEnergyContainerItem item = (IEnergyContainerItem) stack.getItem();

            return item.getEnergyStored(stack) == 0;
        }

        return false;
    }

    /**
     * Is the energy full
     * 
     * @param stack
     * @return whether the stack is full, or false if it is not an energy item
     */
    public static boolean isFull(ItemStack stack) {
        if (EnergyHelper.isEnergyContainerItem(stack)) {

            IEnergyContainerItem item = (IEnergyContainerItem) stack.getItem();

            return item.getEnergyStored(stack) == item.getMaxEnergyStored(stack);
        }

        return false;
    }

}