| java.lang.Object | |
| ↳ | javax.smartcardio.ResponseAPDU |
Class Overview
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.
See Also
Summary
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Constructs a ResponseAPDU from a byte array containing the complete
APDU contents (conditional body and trailed).
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| Public Methods | |||||||||||
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Compares the specified object with this response APDU for equality.
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Returns a copy of the bytes in this APDU.
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Returns a copy of the data bytes in the response body.
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Returns the number of data bytes in the response body (Nr) or 0 if this
APDU has no body.
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Returns the value of the status bytes SW1 and SW2 as a single
status word SW.
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Returns the value of the status byte SW1 as a value between 0 and 255.
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Returns the value of the status byte SW2 as a value between 0 and 255.
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Returns the hash code value for this response APDU.
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Returns a string representation of this response APDU.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Public Constructors
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 |
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Throws
| NullPointerException | if apdu is null |
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| IllegalArgumentException | if apdu.length is less than 2 |
Public Methods
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.
Parameters
| obj | the object to be compared for equality with this response APDU |
|---|
Returns
- true if the specified object is equal to this response APDU
public byte[] getBytes ()
Returns a copy of the bytes in this APDU.
Returns
- a copy of the bytes in this APDU.
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.
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.
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.
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.
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.
public int hashCode ()
Returns the hash code value for this response APDU.
Returns
- the hash code value for this response APDU.
public String toString ()
Returns a string representation of this response APDU.
Returns
- a String representation of this response APDU.