Module java.smartcardio
Package javax.smartcardio

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

    Constructors
    Constructor
    Description
    ResponseAPDU(byte[] apdu)
    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(Object obj)
    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.

    Methods declared in class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • 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 null
      IllegalArgumentException - 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 has 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.
      Overrides:
      toString in class Object
      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.
      Overrides:
      equals in class Object
      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
      See Also:

    • hashCode

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