File	Doc	Category	Size	Date	Package
TLP224Message.java	API Doc	phoneME MR2 API (J2ME)	5825	Wed May 02 18:00:38 BST 2007	com.sun.midp.io.j2me.apdu

TLP224Message

• java.lang.Object
  • java.lang.Throwable
    • java.lang.Exception

Fields Summary
static final byte	EOT This field contains the EOT code which is always sent as the last octet of any TLP224 message.
static final byte	ACK This field contains the ACK code which is returned to the sender as the first octet of a TLP224 response when a message has been successfully received.
static final byte	NACK This field contains the NACK code which is returned to the sender as the first octet of a TLP224 response when a transmission error occurs.
static final byte	POWER_UP This field contains the TLP224 command to power up the CAD.
static final byte	ISO_INPUT This field contains the TLP224 command to send data to the card.
static final byte	ISO_OUTPUT This field contains the TLP224 command to read data from the card.
static final byte	STATUS_SUCCESS This status code is returned by both the Client and Server CAD's when a command has been successfully executed.
static final byte	STATUS_PROTOCOL_ERROR This status code is returned by both the Client and Server CAD's when the first byte of a received message is neither an ACK or NACK.
static final byte	STATUS_MESSAGE_TOO_LONG This status code is returned by both the Client and Server CAD's when a received message exceeds the length of the internal buffers.
static final byte	STATUS_INTERRUPTED_EXCHANGE This status code is returned by the reader or ServerCad if the card sends a Procedure Byte which aborts a ISO_IN or ISO_OUT command.
static final byte	STATUS_CARD_ERROR This status code is returned by the reader or ServerCad if SW1 SW2 are not equal to 0x9000.
static final byte	STATUS_CARD_REMOVED This status code is returned by the reader or ServerCad if the card was removed between exchanges.
static final byte	STATUS_CARD_MISSING This status code is returned by the reader or ServerCad if there is no card in the reader.
private static final int	MAX_MESSAGE_LEN This field contains the size of the largest possible TLP224 Message. This message would be <ACK><LEN><255 bytes of command><LRC>
private byte[]	buf Local buffer for this TLP224 message.
private int	len Current length of data in local buffer.

Constructors Summary
TLP224Message() Construct a new TLP224Message using the default (MAX_MESSAGE_LEN) message size. this.buf = new byte[MAX_MESSAGE_LEN]; this.len = 0;

Methods Summary
byte	computeLRC(int length) Compute the TLP224 LRC of this object. The TLP224 LRC is the exclusive-or of all the bytes in the message. param length The number of bytes to compute the LRC over. return The computed LRC. int lrc = 0; for (int i = 0; i < length; i++) lrc ^= buf[i]; return (byte) lrc;
byte[]	getData() Retrieves the contents of this TLP224Message. return The non-null byte array containing the data to be sent or received. Any changes to this byte array also affect the TLP224Message from which it came. return buf;
int	getLength() Retrieves the length of this TLP224Message. return The length in bytes of the internal buffer as previously set by setLength(). return len;
void	setLength(int newLen) Set the length of the data in this TLP224Message. The length must be less than or equal to the length of the internal buffer. param newLen The length to set. exception IllegalArgumentException if newLen is greater than the length of the internal buffer. this.len = newLen;