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

Go to download
Show more of this group Show more artifacts with this name
Show all versions of j8583 Show documentation
Java implementation of the ISO 8583 protocol, focused on making the creation, edition and reading of ISO8583 messages as simple and flexible as possible.
There is a newer version: 2.0.0
Show newest version
/*
j8583 A Java implementation of the ISO8583 protocol
Copyright (C) 2011 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 2.1 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 java.io.UnsupportedEncodingException;
import java.text.ParseException;

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

/** This class is used to parse fields of type LLLVAR.
 * 
 * @author Enrique Zamudio
 */
public class LllvarParseInfo extends FieldParseInfo {

	
	public LllvarParseInfo() {
		super(IsoType.LLLVAR, 0);
	}

	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 LLLVAR field %d pos %d",
                    field, pos), pos);
		} else if (pos+3 > buf.length) {
			throw new ParseException(String.format(
                    "Insufficient data for LLLVAR header field %d pos %d", field, pos), pos);
		}
        final int len = decodeLength(buf, pos, 3);
		if (len < 0) {
			throw new ParseException(String.format("Invalid LLLVAR length %d field %d pos %d",
					len, field, pos), pos);
		} else if (len+pos+3 > buf.length) {
			throw new ParseException(String.format("Insufficient data for LLLVAR field %d, pos %d",
                    field, pos), pos);
		}
		String _v;
        try {
            _v = len == 0 ? "" : new String(buf, pos + 3, len, getCharacterEncoding());
        } catch (IndexOutOfBoundsException ex) {
            throw new ParseException(String.format(
                    "Insufficient data for LLLVAR 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 + 3, buf.length-pos-3,
					getCharacterEncoding()).substring(0, len);
		}
		if (custom == null) {
			return new IsoValue<>(type, _v, len, null);
		} else {
			T decoded = custom.decodeField(_v);
			//If decode fails, return string; otherwise use the decoded object and its codec
            return decoded == null ? new IsoValue<>(type, _v, len, null) :
                new IsoValue<>(type, decoded, len, custom);
		}
	}

	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 LLLVAR field %d pos %d", field, pos), pos);
		} else if (pos+2 > buf.length) {
			throw new ParseException(String.format(
                    "Insufficient data for bin LLLVAR header, field %d pos %d", field, pos), pos);
		}
		final int len = ((buf[pos] & 0x0f) * 100) + (((buf[pos + 1] & 0xf0) >> 4) * 10) + (buf[pos + 1] & 0x0f);
		if (len < 0) {
			throw new ParseException(String.format(
                    "Invalid bin LLLVAR length %d, field %d pos %d", len, field, pos), pos);
		} else if (len+pos+2 > buf.length) {
			throw new ParseException(String.format(
                    "Insufficient data for bin LLLVAR field %d, pos %d", field, pos), pos);
		}
		if (custom == null) {
			return new IsoValue<>(type, new String(buf, pos + 2, len, getCharacterEncoding()), null);
		} else {
			IsoValue v = new IsoValue<>(type, custom.decodeField(
					new String(buf, pos + 2, len, getCharacterEncoding())), custom);
			if (v.getValue() == null) {
				return new IsoValue<>(type,
						new String(buf, pos + 2, len, getCharacterEncoding()), null);
			}
			return v;
		}
	}

}