Class ATR

java.lang.Object
javax.smartcardio.ATR
All Implemented Interfaces:
Serializable
public final class ATR extends Object implements Serializable
A Smart Card's answer-to-reset bytes. A Card's ATR object can be obtained by calling Card.getATR(). This class does not attempt to verify that the ATR encodes a semantically valid structure.

Instances of this class are immutable. Where data is passed in or out via byte arrays, defensive cloning is performed.

Since:
1.6
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    ATR(byte[] atr)
    Constructs an ATR from a byte array.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object obj)
    Compares the specified object with this ATR for equality.
    byte[]
    getBytes()
    Returns a copy of the bytes in this ATR.
    byte[]
    getHistoricalBytes()
    Returns a copy of the historical bytes in this ATR.
    int
    hashCode()
    Returns the hash code value for this ATR.
    String
    toString()
    Returns a string representation of this ATR.

    Methods declared in class Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • ATR

      public ATR(byte[] atr)
      Constructs an ATR from a byte array.
      Parameters:
      atr - the byte array containing the answer-to-reset bytes
      Throws:
      NullPointerException - if atr is null

  • Method Details

    • getBytes

      public byte[] getBytes()
      Returns a copy of the bytes in this ATR.
      Returns:
      a copy of the bytes in this ATR.

    • getHistoricalBytes

      public byte[] getHistoricalBytes()
      Returns a copy of the historical bytes in this ATR. If this ATR does not contain historical bytes, an array of length zero is returned.
      Returns:
      a copy of the historical bytes in this ATR.

    • toString

      public String toString()
      Returns a string representation of this ATR.
      Overrides:
      toString in class Object
      Returns:
      a String representation of this ATR.

    • equals

      public boolean equals(Object obj)
      Compares the specified object with this ATR for equality. Returns true if the given object is also an ATR and its bytes are identical to the bytes in this ATR.
      Overrides:
      equals in class Object
      Parameters:
      obj - the object to be compared for equality with this ATR
      Returns:
      true if the specified object is equal to this ATR
      See Also:

    • hashCode

      public int hashCode()
      Returns the hash code value for this ATR.
      Overrides:
      hashCode in class Object
      Returns:
      the hash code value for this ATR.
      See Also: