001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.iso;
020
021
022/** {@code IF_CHAR} variant that emits an empty byte array for missing components, used by Mastercard TCC fields. */
023public class IFMC_TCC extends IF_CHAR{
024    /** Default constructor; no instance state to initialise. */
025    public IFMC_TCC() {}
026    @Override
027    public byte[] pack(ISOComponent c) throws ISOException {
028        if (c != null) return super.pack(c);
029        else return new byte[0];
030    }
031
032    @Override
033    public int unpack(ISOComponent c, byte[] b, int offset) throws ISOException {
034        if (b.length > offset &&  (Character.isAlphabetic(b[offset]) || b[offset] == ' ')) {
035            return super.unpack(c, b, offset);
036        }
037        return 0;
038    }
039
040}