FileDocCategorySizeDatePackage
TransitTerminal.javaAPI DocJava Card5024Wed Mar 22 21:07:26 GMT 2006com.sun.javacard.clientsamples.transit

TransitTerminal

public class TransitTerminal extends Terminal
This class implements a transit terminal. It sends transit system entry and exit events to the on-card applet for processing.

Fields Summary
Constructors Summary
TransitTerminal(String hostName, int hostPort, byte[] staticKeyData)
Creates a transit terminal.

param
hostName The hostname where the cref or jcwde tools are running.
param
hostPort The port used by the cref or jcwde tools
param
staticKeyData The static DES key - secret shared by the on-card and off-card applications
throws
Exception

        super(hostName, hostPort, staticKeyData);
Methods Summary
public static voidmain(java.lang.String[] args)
Parses and runs the CLI command.

param
args The CLI arguments: : ([PROCESS_ENTRY ]|[PROCESS_EXIT ])*
throws
Exception

        int i = parseCommonArgs(args);
        if (i <= 0) {
            usage();
            System.exit(3);
        }

        TransitTerminal terminal = new TransitTerminal(hostName, port,
                staticKeyData);

        terminal.powerUp();
        terminal.selectApplet();
        terminal.initializeSession();

        for (; i < args.length; i++) {
            if (args[i].equals("PROCESS_ENTRY")) {
                if (++i < args.length) {
                    short entryStationId = new Short(args[i]).shortValue();
                    terminal.processEntry(entryStationId);
                } else {
                    usage();
                    System.exit(3);
                }
            } else if (args[i].equals("PROCESS_EXIT")) {
                if (++i < args.length) {
                    byte transitFee = new Byte(args[i]).byteValue();
                    terminal.processExit(transitFee);
                } else {
                    usage();
                    System.exit(3);
                }
            } else {
                usage();
                System.exit(3);
            }
        }

        terminal.powerDown();

        System.exit(0);
private voidprocessEntry(short entryStationId)
Sends a transit system entry event to the on-card applet for processing.

param
entryStationId The entry station id
throws
Exception


        // Request Message: [2-bytes Entry Station ID]

        byte[] requestMessage = new byte[2];

        copyShort(entryStationId, requestMessage, 0);

        // Response Message: [[8-bytes UID], [2-bytes Correlation ID]]

        byte[] responseMessage = processRequest(PROCESS_ENTRY, requestMessage);

        if (responseMessage != null) {

            // Retrieve the UID
            byte[] uid = new byte[UID_LENGTH];
            System.arraycopy(responseMessage, 0, uid, 0, UID_LENGTH);

            // Retrieve the correlation Id
            short correlationId = getShort(responseMessage, 2);

            System.out.println("processEntry: [" + entryStationId + "] => "
                    + "[ " + new String(uid) + ", " + correlationId + "]");
        } else {

            System.out.println("processEntry: [" + entryStationId + "] => "
                    + "error");
        }
private voidprocessExit(byte transitFee)
Sends a transit system exit event to the on-card applet for processing.

param
transitFee The transit fee to be debited from the on-card account.
throws
Exception


        // Request Message: [1-byte Transit Fee]

        byte[] requestMessage = new byte[1];

        requestMessage[0] = transitFee;

        // Response Message: [[8-bytes UID], [2-bytes Correlation ID]]

        byte[] responseMessage = processRequest(PROCESS_EXIT, requestMessage);

        if (responseMessage != null) {

            // Retrieve the UID
            byte[] uid = new byte[UID_LENGTH];
            System.arraycopy(responseMessage, 0, uid, 0, UID_LENGTH);

            // Retrieve the correlation Id
            short correlationId = getShort(responseMessage, 2);

            System.out.println("processEntry: [" + transitFee + "] => " + "[ "
                    + new String(uid) + ", " + correlationId + "]");
        } else {

            System.out.println("processEntry: [" + transitFee + "] => "
                    + "error");
        }
private static voidusage()
Prints the usage.

        commonUsage();
        System.out
                .println("<command list>: ([PROCESS_ENTRY <entry station id>]|[PROCESS_EXIT <transit fee>])*");