FileDocCategorySizeDatePackage
POSTerminal.javaAPI DocJava Card4011Wed Mar 22 21:07:26 GMT 2006com.sun.javacard.clientsamples.transit

POSTerminal

public class POSTerminal extends Terminal
This class implements a Point Of Sale terminal. It allows for crediting the on-card account and querying the current account balance.

Fields Summary
Constructors Summary
POSTerminal(String hostName, int hostPort, byte[] staticKeyData)
Creates a Point Of Sale 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
private voidcredit(byte amount)
Credits the on-card account.

param
amount The credited amount
throws
Exception


        // Request Message: [1-byte Credit Amount]

        byte[] requestMessage = new byte[1];

        requestMessage[0] = amount;

        // Response Message: []

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

        if (responseMessage != null) {

            System.out.println("credit: [" + amount + "] => " + "OK");
        } else {

            System.out.println("credit: [" + amount + "] => " + "error");
        }
private voidgetBalance()
Gets the on-card account balance.

throws
Exception


        // Request Message: []

        byte[] requestMessage = new byte[0];

        // Response Message: [2-bytes Balance]

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

        if (responseMessage != null) {

            // Retrieve the balance
            short balance = getShort(responseMessage, 0);

            System.out.println("getBalance: [] => " + "[ " + balance + " ]");
        } else {

            System.out.println("getBalance: [] => " + "error");
        }
public static voidmain(java.lang.String[] args)
Parses and runs the CLI command.

param
args The CLI arguments: : ([VERIFY ]|[GET_BALANCE]|[CREDIT ])*
throws
Exception

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

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

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

        for (; i < args.length; i++) {
            if (args[i].equals("VERIFY")) {
                if (++i < args.length) {
                    byte[] pin = args[i].getBytes();
                    terminal.verifyPIN(pin);
                } else {
                    usage();
                    System.exit(3);
                }
            } else if (args[i].equals("GET_BALANCE")) {
                terminal.getBalance();
            } else if (args[i].equals("CREDIT")) {
                if (++i < args.length) {
                    byte creditAmount = new Byte(args[i]).byteValue();
                    terminal.credit(creditAmount);
                } else {
                    usage();
                    System.exit(3);
                }
            } else {
                usage();
                System.exit(3);
            }
        }

        terminal.powerDown();

        System.exit(0);
private static voidusage()
Prints the usage.

        commonUsage();
        System.out
                .println("<command list>: ([VERIFY <pin>]|[GET_BALANCE]|[CREDIT <credit amount>])*");