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.packager;
020
021import java.util.ArrayList;
022import java.util.List;
023import java.util.Map;
024
025import org.jpos.iso.*;
026import org.xml.sax.Attributes;
027
028/**
029 * This packager is used to package subfields such as field 60 of GICC.
030 */
031public class GICCSubFieldPackager extends GenericPackager implements ISOSubFieldPackager, GenericPackagerParams {
032    private int fieldId = 0;
033
034    /**
035     * Default constructor.
036     *
037     * @throws ISOException if configuration fails
038     */
039    public GICCSubFieldPackager() throws ISOException {
040        super();
041    }
042
043    /**
044     * Always return false
045     */
046    protected boolean emitBitMap() {
047        return false;
048    }
049
050    @Override
051    public int getFieldNumber() {
052        return fieldId;
053    }
054
055    @Override
056    public void setGenericPackagerParams(Attributes atts) {
057        super.setGenericPackagerParams(atts);
058        fieldId = Integer.parseInt(atts.getValue("id"));
059    }
060
061    public byte[] pack(ISOComponent c) throws ISOException {
062        try {
063            int len = 0;
064            byte[] result;
065            Map tab = c.getChildren();
066            List list = new ArrayList();
067
068            // Handle first IF_CHAR field
069            ISOField f0 = (ISOField) tab.get(0);
070            if (f0 != null) {
071                String s = (String) f0.getValue();
072                list.add(s.getBytes());
073                len += s.getBytes().length;
074            }
075            for (int i = 1; i < fld.length; i++) {
076                Object obj = tab.get(i);
077                if (obj instanceof ISOComponent) {
078                    ISOComponent f = (ISOComponent) obj;
079                    byte[] b = fld[i].pack(f);
080                    list.add(b);
081                    len += b.length;
082                }
083            }
084
085            result = new byte[len];
086            int k = 0;
087            for (int i = 0; i < list.size(); i++) {
088                byte[] b = (byte[]) list.get(i);
089                for (int j = 0; j < b.length; j++)
090                    result[k++] = b[j];
091            }
092
093            return result;
094        } catch (Exception ex) {
095            throw new ISOException(ex);
096        }
097    }
098
099    public int unpack(ISOComponent m, byte[] b) throws ISOException {
100        // Unpack the IF_CHAR field
101        int consumed = 0;
102        ISOComponent c;
103        if (fld[0] != null && b[consumed] == 0x20) {
104            // Hack to support a nine-byte filler
105            c = fld[0].createComponent(0);
106            consumed += fld[0].unpack(c, b, consumed);
107            m.set(c);
108        }
109
110        // Now unpack the IFEP_LLCHAR fields
111        for (; consumed < b.length; ) {
112            int fieldNumber = Integer.parseInt(ISOUtil.ebcdicToAscii(b,
113              consumed + 3, 2));
114            if (fld[fieldNumber] == null)
115                break;
116            c = fld[fieldNumber].createComponent(fieldNumber);
117            consumed += fld[fieldNumber].unpack(c, b, consumed);
118            m.set(c);
119        }
120
121        return consumed;
122    }
123}
124