Module java.smartcardio
Package javax.smartcardio

Class 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:
    Card.getATR(), Serialized Form

    • Constructor Detail

      • 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 Detail

      • 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:
        Object.hashCode(), HashMap