69 lines
2.4 KiB
Java
69 lines
2.4 KiB
Java
/*
|
|
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.math.BigInteger;
|
|
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 NUMERIC fields.
|
|
*
|
|
* @author Enrique Zamudio
|
|
*/
|
|
public class NumericParseInfo extends AlphaNumericFieldParseInfo {
|
|
|
|
public NumericParseInfo(int len) {
|
|
super(IsoType.NUMERIC, len);
|
|
}
|
|
|
|
@Override
|
|
public <T> IsoValue<Number> parseBinary(final int field, final byte[] buf,
|
|
final int pos, final CustomField<T> custom)
|
|
throws ParseException {
|
|
if (pos < 0) {
|
|
throw new ParseException(String.format("Invalid bin NUMERIC field %d pos %d",
|
|
field, pos), pos);
|
|
} else if (pos+(length/2) > buf.length) {
|
|
throw new ParseException(String.format(
|
|
"Insufficient data for bin %s field %d of length %d, pos %d",
|
|
type, field, length, pos), pos);
|
|
}
|
|
//A long covers up to 18 digits
|
|
if (length < 19) {
|
|
return new IsoValue<Number>(IsoType.NUMERIC, Bcd.decodeToLong(buf, pos, length),
|
|
length, null);
|
|
} else {
|
|
//Use a BigInteger
|
|
try {
|
|
return new IsoValue<Number>(IsoType.NUMERIC,
|
|
Bcd.decodeToBigInteger(buf, pos, length), length, null);
|
|
} catch (IndexOutOfBoundsException ex) {
|
|
throw new ParseException(String.format(
|
|
"Insufficient data for bin %s field %d of length %d, pos %d",
|
|
type, field, length, pos), pos);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|