Item filtering logic

IItemFilter.java

import net.minecraft.item.ItemStack;

@FunctionalInterface
public interface IItemFilter {

    boolean isValid(ItemStack stack);
}

WhitelistFilter.java

import net.minecraft.item.ItemStack;

public class WhitelistFilter implements IItemFilter {

    public static final int LISTING_MODE = 1;
    public static final int DAMAGE = 1 << 2;
    public static final int NBT = 1 << 3;
    public static final int ORE_DICT = 1 << 4;

    private ItemStack filter;
    private int mode;

    @Override
    public boolean isValid(ItemStack stack) {
        return filter.isItemEqualIgnoreDurability(stack);
    }

    public boolean isComparingDamage() {
        return isComparing(DAMAGE);
    }

    public boolean isComparingNBT() {
        return isComparing(NBT);
    }

    public boolean isComparingOreDict() {
        return isComparing(ORE_DICT);
    }

    public boolean isComparing(int mask) {
        return (mode | mask) == mode;
    }

    public void setMatchDamage() {
        setMatch(DAMAGE);
    }

    public void setMatchNBT() {
        setMatch(NBT);
    }

    public void setMatchOreDict() {
        setMatch(ORE_DICT);
    }

    public void setMatch(int mask) {
        mode = mode | mask;
    }

    public void setIgnoreDamage() {
        setIgnore(DAMAGE);
    }

    public void setIgnoreNBT() {
        setIgnore(NBT);
    }

    public void setIgnoreOreDict() {
        setIgnore(ORE_DICT);
    }

    public void setIgnore(int mask) {
        mode = mode & ~mask;
    }
}