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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) 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.CustomBinaryField;
import com.solab.iso8583.CustomField;
import com.solab.iso8583.IsoType;
import com.solab.iso8583.IsoValue;
import com.solab.iso8583.util.Bcd;
import com.solab.iso8583.util.HexCodec;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
/**
* This class is used to parse fields of type LLLLBIN.
*
* @author Enrique Zamudio
*/
public class LlllbinParseInfo extends FieldParseInfo {
public LlllbinParseInfo(IsoType t, int len) {
super(t, len);
}
public LlllbinParseInfo() {
super(IsoType.LLLLBIN, 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 LLLLBIN field %d pos %d",
field, pos), pos);
} else if (pos+4 > buf.length) {
throw new ParseException(String.format("Insufficient LLLLBIN header field %d",
field), pos);
}
final int l = decodeLength(buf, pos, 4);
if (l < 0) {
throw new ParseException(String.format("Invalid LLLLBIN length %d field %d pos %d",
l, field, pos), pos);
} else if (l+pos+4 > buf.length) {
throw new ParseException(String.format(
"Insufficient data for LLLLBIN field %d, pos %d", field, pos), pos);
}
byte[] binval = l == 0 ? new byte[0] : HexCodec.hexDecode(new String(buf, pos + 4, l));
if (custom == null) {
return new IsoValue<>(type, binval, binval.length, null);
} else if (custom instanceof CustomBinaryField) {
try {
T dec = ((CustomBinaryField)custom).decodeBinaryField(
buf, pos + 4, l);
return dec == null ? new IsoValue<>(type, binval, binval.length, null) :
new IsoValue<>(type, dec, 0, custom);
} catch (IndexOutOfBoundsException ex) {
throw new ParseException(String.format(
"Insufficient data for LLLLBIN field %d, pos %d", field, pos), pos);
}
} else {
try {
T dec = custom.decodeField(
l == 0 ? "" : new String(buf, pos + 4, l));
return dec == null ? new IsoValue<>(type, binval, binval.length, null) :
new IsoValue<>(type, dec, l, custom);
} catch (IndexOutOfBoundsException ex) {
throw new ParseException(String.format(
"Insufficient data for LLLLBIN field %d, pos %d", field, pos), pos);
}
}
}
@Override
public IsoValue parseBinary(final int field, final byte[] buf,
final int pos, final CustomField custom)
throws ParseException {
if (pos < 0) {
throw new ParseException(String.format("Invalid bin LLLLBIN field %d pos %d",
field, pos), pos);
} else if (pos+2 > buf.length) {
throw new ParseException(String.format("Insufficient LLLLBIN header field %d",
field), pos);
}
final int l = getLengthForBinaryParsing(buf, pos);
if (l < 0) {
throw new ParseException(String.format("Invalid LLLLBIN length %d field %d pos %d",
l, field, pos), pos);
}
if (l+pos+2 > buf.length) {
throw new ParseException(String.format(
"Insufficient data for bin LLLLBIN field %d, pos %d requires %d, only %d available",
field, pos, l, buf.length-pos+1), pos);
}
byte[] _v = new byte[l];
System.arraycopy(buf, pos+2, _v, 0, l);
if (custom == null) {
int len = getFieldLength(buf, pos);
return new IsoValue<>(type, _v, len, forceHexadecimalLength);
} else if (custom instanceof CustomBinaryField) {
try {
T dec = ((CustomBinaryField)custom).decodeBinaryField(
buf, pos + 2, l);
return dec == null ? new IsoValue<>(type, _v, _v.length, null) :
new IsoValue(type, dec, l, custom);
} catch (IndexOutOfBoundsException ex) {
throw new ParseException(String.format(
"Insufficient data for LLLLBIN field %d, pos %d", field, pos), pos);
}
} else {
T dec = custom.decodeField(HexCodec.hexEncode(_v, 0, _v.length));
return dec == null ? new IsoValue<>(type, _v, null) :
new IsoValue<>(type, dec, custom);
}
}
protected int getLengthForBinaryParsing(final byte[] buf, final int pos) {
return getFieldLength(buf, pos);
}
private int getFieldLength(byte[] buf, int pos) {
return forceHexadecimalLength ?
((buf[pos] & 0xff) << 8) | (buf[pos + 1] & 0xff)
:
Bcd.parseBcdLength2bytes(buf, pos);
}
}