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:
-
Card.getATR()
, Serialized Form
Constructor Summary
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 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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
- ifatr
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.
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 classObject
- 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
hashCode
public int hashCode()
Returns the hash code value for this ATR.
- Overrides:
-
hashCode
in classObject
- Returns:
- the hash code value for this ATR.
- See Also:
-
Object.equals(java.lang.Object)
,System.identityHashCode(java.lang.Object)