public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
in.readByte(); // ignore version for now
fieldNumber = in.readShort();
byte fieldType;
ISOComponent c;
try {
while ((fieldType = in.readByte()) != 'E') {
c = null;
switch (fieldType) {
case 'F':
c = new ISOField();
break;
case 'A':
c = new ISOAmount();
break;
case 'B':
c = new ISOBinaryField();
break;
case 'M':
c = new ISOMsg();
break;
case 'H':
readHeader(in);
break;
case 'P':
readPackager(in);
break;
case 'D':
readDirection(in);
break;
default:
throw new IOException("malformed ISOMsg");
}
if (c != null) {
((Externalizable) c).readExternal(in);
set(c);
}
}
} catch (ISOException e) {
throw new IOException(e.getMessage());
}
}
