Class ResponseAPDU
java.lang.Object
javax.smartcardio.ResponseAPDU
- All Implemented Interfaces:
-
Serializable
public final class ResponseAPDU extends Object implements Serializable
A response APDU as defined in ISO/IEC 7816-4. It consists of a conditional body and a two byte trailer. This class does not attempt to verify that the APDU encodes a semantically valid response.
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
| Constructor | Description |
|---|---|
ResponseAPDU |
Constructs a ResponseAPDU from a byte array containing the complete APDU contents (conditional body and trailed).
|
Method Summary
| Modifier and Type | Method | Description |
|---|---|---|
boolean |
equals |
Compares the specified object with this response APDU for equality.
|
byte[] |
getBytes() |
Returns a copy of the bytes in this APDU.
|
byte[] |
getData() |
Returns a copy of the data bytes in the response body.
|
int |
getNr() |
Returns the number of data bytes in the response body (Nr) or 0 if this APDU has no body.
|
int |
getSW() |
Returns the value of the status bytes SW1 and SW2 as a single status word SW.
|
int |
getSW1() |
Returns the value of the status byte SW1 as a value between 0 and 255.
|
int |
getSW2() |
Returns the value of the status byte SW2 as a value between 0 and 255.
|
int |
hashCode() |
Returns the hash code value for this response APDU.
|
String |
toString() |
Returns a string representation of this response APDU.
|
Constructor Details
ResponseAPDU
public ResponseAPDU(byte[] apdu)
Constructs a ResponseAPDU from a byte array containing the complete APDU contents (conditional body and trailed).
Note that the byte array is cloned to protect against subsequent modification.
- Parameters:
apdu- the complete response APDU- Throws:
NullPointerException- if apdu is nullIllegalArgumentException- if apdu.length is less than 2
Method Details
getNr
public int getNr()
Returns the number of data bytes in the response body (Nr) or 0 if this APDU has no body. This call is equivalent to
getData().length.
- Returns:
- the number of data bytes in the response body or 0 if this APDU has no body.
getData
public byte[] getData()
Returns a copy of the data bytes in the response body. If this APDU as no body, this method returns a byte array with a length of zero.
- Returns:
- a copy of the data bytes in the response body or the empty byte array if this APDU has no body.
getSW1
public int getSW1()
Returns the value of the status byte SW1 as a value between 0 and 255.
- Returns:
- the value of the status byte SW1 as a value between 0 and 255.
getSW2
public int getSW2()
Returns the value of the status byte SW2 as a value between 0 and 255.
- Returns:
- the value of the status byte SW2 as a value between 0 and 255.
getSW
public int getSW()
Returns the value of the status bytes SW1 and SW2 as a single status word SW. It is defined as
(getSW1() << 8) | getSW2()
- Returns:
- the value of the status word SW.
getBytes
public byte[] getBytes()
Returns a copy of the bytes in this APDU.
- Returns:
- a copy of the bytes in this APDU.
toString
public String toString()
Returns a string representation of this response APDU.
equals
public boolean equals(Object obj)
Compares the specified object with this response APDU for equality. Returns true if the given object is also a ResponseAPDU and its bytes are identical to the bytes in this ResponseAPDU.
hashCode
public int hashCode()
Returns the hash code value for this response APDU.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/17/docs/api/java.smartcardio/javax/smartcardio/ResponseAPDU.html