Question

I have the folowing interface;

public static interface Attributes
{
        public final static String InterestDeterminationDate = "InterestDeterminationDate";
        public final static String CreditType = "CreditType";
        public final static String NumberInternal = "NumberInternal";
        public final static String InterestRate = "InterestRate";
        public final static String RemainingDebtAmount = "RemainingDebtAmount";
        public final static String ConsumerPart = "ConsumerPart";
        public final static String TechnicalProductName = "TechnicalProductName";
        public final static String TermOfDuration = "TermOfDuration";
        public final static String PeriodInterestTaxReduction = "PeriodInterestTaxReduction";
        public final static String OriginMark = "OriginMark";
        public final static String Currency = "Currency";
        public final static String PenaltyRuleId = "PenaltyRuleId";
        public final static String InstallmentCalculationMethod = "InstallmentCalculationMethod";
        public final static String InterestRenewalDate = "InterestRenewalDate";
        public final static String TechnicalProductDescription = "TechnicalProductDescription";
        public final static String TechnicalProductDate = "TechnicalProductDate";
        public final static String CollectionIntervalPeriod = "CollectionIntervalPeriod";
        public final static String Enddate = "Enddate";
}

I need to check is a given string is a part of this Attributes Interface.

How can i check this?

Regards,
bas Hendriks

Answer 1

Your question doesn’t make it clear whether you’re trying to find out if the query string is the property name or value. If you’re trying to find out if it’s a value, the following will work:

public static boolean hasValue(String value) throws IllegalAccessException {
    for(Field field : Attributes.class.getDeclaredFields()) {
        if(((String)field.get(Attributes.class)).equals(value)) {
            return true;
        }
    }
    return false;
}

However, I would advise following Colin’s suggestion of using an Enum, it will be easier for you to work with in the future.