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UPC.java

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package net.threebit.utils.sosc ; 

public class UPC extends Validatable
{
    public UPC(final String upc)
    {
        super(upc, "UPC");
    }

        public boolean equals(Object o)
    {
       if (!(o instanceof UPC))
       {
           return (false);
       }
       return (super.equals(o));
    }

    protected boolean checkDigits(final int[] digits)
    {
        int sumEven;
        int sumOdd;
        int sum;

        sumEven = 0;
        sumOdd = 0;
        sum = 0;
        
        for(int i = 0; i < (number.length() - 1); i++)
        {
                if((i % 2) == 0)
            {
                sumEven += Utils.add(digits[i]);
            }
            else
            {
                sumOdd += digits[i];
            }
        }
        
        sumEven *= 3;
        sum = (sumEven + sumOdd);
        
        while ((sum % 10) != 0)
        {
            sum++;
        }
        
        if ((sum - (sumEven + sumOdd)) == digits[number.length() - 1])
        {
            return(true);
        }
        return (false);
    }
    
    public static boolean validate(String num)
    {
        return (new UPC(num).validate());
    }
      
    protected boolean checkSize()
    {
        return (12 == number.length());
    }
 }

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