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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.
/*
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 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 java.io.UnsupportedEncodingException;
import java.text.ParseException;
import com.solab.iso8583.CustomField;
import com.solab.iso8583.IsoType;
import com.solab.iso8583.IsoValue;
import com.solab.iso8583.util.Bcd;
/**
* This class is used to parse fields of type LLLVAR.
*
* @author Enrique Zamudio
*/
public class LllvarParseInfo extends FieldParseInfo {
/**
* Instantiates a new Lllvar parse info.
*/
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(%s) field %d pos %d",
len, new String(buf, pos, 3), field, pos), pos);
} else if (len+pos+3 > buf.length) {
throw new ParseException(String.format("Insufficient data for LLLVAR field %d, pos %d len %d",
field, pos, len), 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 len %d", field, pos, len), 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) + Bcd.parseBcdLength(buf[pos + 1]);
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;
}
}
}