Method isInvalid

common/buildcraft/lib/misc/StackUtil.java:258–260

Tests to see if a given stack is invalid. This ALSO tests to see if the item is null or the stacksize is less than 0. Vanilla's method also does a metadata check, but that's not used so much in the codebase.

(ItemStack stack)

    /** Tests to see if a given stack is invalid. This ALSO tests to see if the item is null or the stacksize is less
     * than 0. Vanilla's method also does a metadata check, but that's not used so much in the codebase. */
    public static boolean isInvalid(ItemStack stack) {
        return stack == INVALID_STACK || stack.getItem() == null || stack.stackSize <= 0;
    }
}