109 lines
4.4 KiB
Java
109 lines
4.4 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.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 <T> IsoValue<?> parse(final int field, final byte[] buf,
|
|
final int pos, final CustomField<T> 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);
|
|
}
|
|
length = decodeLength(buf, pos, 3);
|
|
if (length < 0) {
|
|
throw new ParseException(String.format("Invalid LLLVAR length %d field %d pos %d",
|
|
length, field, pos), pos);
|
|
} else if (length+pos+3 > buf.length) {
|
|
throw new ParseException(String.format("Insufficient data for LLLVAR field %d, pos %d",
|
|
field, pos), pos);
|
|
}
|
|
String _v;
|
|
try {
|
|
_v = length == 0 ? "" : new String(buf, pos + 3, length, 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() != length) {
|
|
_v = new String(buf, pos + 3, buf.length-pos-3, getCharacterEncoding()).substring(0, length);
|
|
}
|
|
if (custom == null) {
|
|
return new IsoValue<String>(type, _v, length, 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<String>(type, _v, length, null) :
|
|
new IsoValue<T>(type, decoded, length, custom);
|
|
}
|
|
}
|
|
|
|
public <T> IsoValue<?> parseBinary(final int field, final byte[] buf,
|
|
final int pos, final CustomField<T> 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+3 > buf.length) {
|
|
throw new ParseException(String.format(
|
|
"Insufficient data for bin LLLVAR header, field %d pos %d", field, pos), pos);
|
|
}
|
|
length = ((buf[pos] & 0x0f) * 100) + (((buf[pos + 1] & 0xf0) >> 4) * 10) + (buf[pos + 1] & 0x0f);
|
|
if (length < 0) {
|
|
throw new ParseException(String.format(
|
|
"Invalid bin LLLVAR length %d, field %d pos %d", length, field, pos), pos);
|
|
} else if (length+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<String>(type, new String(buf, pos + 2, length, getCharacterEncoding()), null);
|
|
} else {
|
|
IsoValue<T> v = new IsoValue<T>(type, custom.decodeField(new String(buf, pos + 2, length, getCharacterEncoding())), custom);
|
|
if (v.getValue() == null) {
|
|
return new IsoValue<String>(type, new String(buf, pos + 2, length, getCharacterEncoding()), null);
|
|
}
|
|
return v;
|
|
}
|
|
}
|
|
|
|
}
|