net.link.eu.vat.client.util.VATUtil.java Source code

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Here is the source code for net.link.eu.vat.client.util.VATUtil.java

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/*
 * SafeOnline project.
 *
 * Copyright 2006-2013 Lin.k N.V. All rights reserved.
 * Lin.k N.V. proprietary/confidential. Use is subject to license terms.
 */

package net.link.eu.vat.client.util;

import net.link.eu.vat.client.CountryCode;
import org.apache.commons.lang3.StringUtils;
import org.jetbrains.annotations.NotNull;

/**
 * User: gvhoecke <gianni.vanhoecke@lin-k.net>
 * Date: 11/03/14
 * Time: 14:11
 */
public class VATUtil {

    /**
     * Cleans a VAT number, ready to send to EU VAT service.
     *
     * E.g.: "BE 0446.495.156" becomes "0446495156".
     *
     * @param vatNumber the VAT number.
     *
     * @return the cleaned VAT number.
     */
    @NotNull
    public static String cleanEnterpriseNumber(@NotNull String vatNumber) {

        return vatNumber.replaceAll("[^0-9]+", ""); //Remove all non-digits
    }

    /**
     * Tries to guess the country from the given VAT number.
     * Defaults to the given country code when this methods cannot guess it.
     *
     * @param vatNumber the number.
     * @param defaultCountry the default country.
     *
     * @return the countrycode if found, or the default one.
     */
    @NotNull
    public static CountryCode guessCountryFromNumber(@NotNull String vatNumber,
            @NotNull CountryCode defaultCountry) {

        if (StringUtils.isBlank(vatNumber) || vatNumber.length() <= 2) {

            return defaultCountry;
        }

        try {

            String code = vatNumber.substring(0, 2).toUpperCase();

            if (StringUtils.isAlpha(code)) {

                return CountryCode.valueOf(code); //throws error when not found
            } else {

                return defaultCountry;
            }
        } catch (Exception e) {

            return defaultCountry;
        }
    }
}