/*
*
*/
package org.uic.ticket.api;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.uic.ticket.api.asn.omv1.UicRailTicketData;
import org.uic.ticket.api.spec.IUicRailTicket;
import org.uic.ticket.api.utils.Api2OpenAsnEncoder;
import org.uic.ticket.api.utils.OpenAsn2ApiDecoder;
/**
* The Class UicRailTicketCoder.
*/
public class UicRailTicketCoder {
/**
* encode an UicRailTicket to asn.1 format using PER unaligned encoding
*
* @param outputStream the output stream for the encoded data
* @param uicRailTicket the uic rail ticket to be encoded
* @param version version of the asn1 specification
* @throws IOException signals that an I/O exception has occurred.
* @throws EncodingFormatException signals that a format rule of the asn.1 specification was violated.
*/
public byte[] encodeTag(IUicRailTicket uicRailTicket, int version) throws IOException, EncodingFormatException {
byte[] content = encode(uicRailTicket, version);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
String idTag = "U_FLEX";
String versionId = "01";
int length = 8;
//size of data
length = length + content.length;
//size of length element
length = length + 4;
String lengthElement = String.format("%04d",length);
outputStream.write(idTag.getBytes());
outputStream.write(versionId.getBytes());
outputStream.write(lengthElement.getBytes());
outputStream.write(content);
return outputStream.toByteArray();
}
/**
* encode an UicRailTicket to asn.1 format using PER unaligned encoding
*
* @param outputStream the output stream for the encoded data
* @param uicRailTicket the uic rail ticket to be encoded
* @param version of the asn1 specification
* @throws IOException signals that an I/O exception has occurred.
* @throws EncodingFormatException signals that a format rule of the asn.1 specification was violated.
*/
public byte[] encode (IUicRailTicket uicRailTicket, int version) throws IOException, EncodingFormatException{
if (version != 1) {
throw new EncodingFormatException(String.format("Encoding version %d not supported", version));
}
Api2OpenAsnEncoder uicEncoder = new Api2OpenAsnEncoder();
UicRailTicketData asnUicRailTicketData = uicEncoder.populateToAsn1Model(uicRailTicket);
return asnUicRailTicketData.encode();
}
/**
* encode an UicRailTicket to asn.1 format using PER unaligned encoding
*
* @param outputStream the output stream for the encoded data
* @param uicRailTicket the uic rail ticket to be encoded
* @param version of the asn1 specification
* @throws IOException signals that an I/O exception has occurred.
* @throws EncodingFormatException signals that a format rule of the asn.1 specification was violated.
*/
public void encode ( ByteArrayOutputStream outputStream, IUicRailTicket uicRailTicket, int version) throws IOException, EncodingFormatException{
if (version != 1) {
throw new EncodingFormatException(String.format("Encoding version %d not supported", version));
}
Api2OpenAsnEncoder uicEncoder = new Api2OpenAsnEncoder();
UicRailTicketData asnUicRailTicketData = uicEncoder.populateToAsn1Model(uicRailTicket);
outputStream.write(asnUicRailTicketData.encode());
return;
}
/**
* Decode a rail ticket from asn.1 unaligned PER encoded data.
*
* @param byteData the asn.1 PER encoded byte data
* @return the decoded uic rail ticket
* @throws IOException signals that an I/O exception has occurred.
* @throws EncodingFormatException
*/
public IUicRailTicket decodeFromAsn (byte[] byteData, int version) throws IOException, EncodingFormatException{
if (version != 1) {
throw new EncodingFormatException(String.format("Encoding version %d not supported", version));
}
UicRailTicketData asnUicRailTicketData = UicRailTicketData.decode(byteData);
OpenAsn2ApiDecoder uicDecoder = new OpenAsn2ApiDecoder();
IUicRailTicket uicRailTicket = uicDecoder.decodeFromAsn(asnUicRailTicketData);
return uicRailTicket;
}
/**
* Decode a rail ticket from asn.1 unaligned PER encoded data.
* @param version of the asn1 specification
* @param input stream of the asn.1 PER encoded data
* @return the decoded uic rail ticket
* @throws IOException signals that an I/O exception has occurred.
* @throws EncodingFormatException
*/
public IUicRailTicket decodeFromAsn (InputStream input, int version) throws IOException, EncodingFormatException{
if (version != 1) {
throw new EncodingFormatException(String.format("Encoding version %d not supported", version));
}
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
byte[] data = new byte[16384];
while ((nRead = input.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
byte[] byteData = buffer.toByteArray();
return decodeFromAsn (byteData, version);
}
}
