com.solab.iso8583.parse.LlllvarParseInfo Maven / Gradle / Ivy

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Java implementation of the ISO 8583 protocol, focused on making the creation, edition and reading of ISO8583 messages as simple and flexible as possible.
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/*
 * j8583 A Java implementation of the ISO8583 protocol
 * Copyright (C) 2007 Enrique Zamudio Lopez
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */
package com.solab.iso8583.parse;

import com.solab.iso8583.CustomField;
import com.solab.iso8583.IsoType;
import com.solab.iso8583.IsoValue;
import com.solab.iso8583.util.Bcd;

import java.io.UnsupportedEncodingException;
import java.text.ParseException;

/**
 * Blabla.
 *
 * @author Enrique Zamudio
 *         Date: 19/02/15 18:30
 */
public class LlllvarParseInfo  extends FieldParseInfo {

	public LlllvarParseInfo() {
		super(IsoType.LLLLVAR, 0);
	}

    @Override
	public  IsoValue parse(final int field, final byte[] buf,
                             final int pos, final CustomField custom)
			throws ParseException, UnsupportedEncodingException {
		if (pos < 0) {
			throw new ParseException(String.format(
					"Invalid LLLLVAR field %d %d", field, pos), pos);
		} else if (pos+4 > buf.length) {
			throw new ParseException(String.format(
					"Insufficient data for LLLLVAR header, pos %d", pos), pos);
		}
		final int len = decodeLength(buf, pos, 4);
		if (len < 0) {
			throw new ParseException(String.format(
                    "Invalid LLLLVAR length %d, field %d pos %d", len, field, pos), pos);
		} else if (len+pos+4 > buf.length) {
			throw new ParseException(String.format(
                    "Insufficient data for LLLLVAR field %d, pos %d", field, pos), pos);
		}
		String _v;
        try {
            _v = len == 0 ? "" : new String(buf, pos + 4, len, getCharacterEncoding());
        } catch (IndexOutOfBoundsException ex) {
            throw new ParseException(String.format(
                    "Insufficient data for LLLLVAR header, field %d pos %d", field, pos), pos);
        }
		//This is new: if the String's length is different from the specified
		// length in the buffer, there are probably some extended characters.
		// So we create a String from the rest of the buffer, and then cut it to
		// the specified length.
		if (_v.length() != len) {
			_v = new String(buf, pos + 4, buf.length-pos-4,
					getCharacterEncoding()).substring(0, len);
		}
		if (custom == null) {
			return new IsoValue<>(type, _v, len, null);
		} else {
            T dec = custom.decodeField(_v);
            return dec == null ? new IsoValue<>(type, _v, len, null) :
                    new IsoValue<>(type, dec, len, custom);
		}
	}

    @Override
	public  IsoValue parseBinary(final int field, final byte[] buf,
                                   final int pos, final CustomField custom)
			throws ParseException, UnsupportedEncodingException {
		if (pos < 0) {
			throw new ParseException(String.format("Invalid bin LLLLVAR field %d pos %d",
                    field, pos), pos);
		} else if (pos+2 > buf.length) {
			throw new ParseException(String.format(
                    "Insufficient data for bin LLLLVAR header, field %d pos %d",
					field, pos), pos);
		}
        final int len = Bcd.parseBcdLength2bytes(buf, pos);
		if (len < 0) {
			throw new ParseException(String.format(
                    "Invalid bin LLLLVAR length %d, field %d pos %d", len, field, pos), pos);
		}
		if (len+pos+2 > buf.length) {
			throw new ParseException(String.format(
                    "Insufficient data for bin LLLLVAR field %d, pos %d", field, pos), pos);
		}
		if (custom == null) {
			return new IsoValue<>(type, new String(buf, pos + 2, len,
					getCharacterEncoding()), null);
		} else {
            T dec = custom.decodeField(new String(buf, pos + 2, len, getCharacterEncoding()));
            return dec == null ? new IsoValue<>(type,
					new String(buf, pos + 2, len, getCharacterEncoding()), null) :
                    new IsoValue<>(type, dec, custom);
		}
	}

}