package org.jscsi.target.scsi.cdb;

 import java.nio.ByteBuffer;

 import org.jscsi.target.util.BitManip;

 /**

  * This class represents Command Descriptor Blocks for the <code>READ CAPACITY (16)</code> SCSI command.

  * 

  * @author Andreas Ergenzinger

  */

 public class ReadCapacity16Cdb extends ReadCapacityCdb {

     /**

      * The mandatory value of the SERVICE ACTION field.

      */

     private static final byte SERVICE_ACTION = 0x10;

     /**

      * The value of the SERVICE ACTION field.

      * <p>

      * The value of this 5-bit field must equal {@link #SERVICE_ACTION}. Its meaning is described in SPC-4.

      */

     private final byte serviceAction;

     public ReadCapacity16Cdb (ByteBuffer buffer) {

         super(buffer);

         // deserialize SERVICE ACTION field

         serviceAction = (byte) (buffer.get(1) & 31);

         if (serviceAction != SERVICE_ACTION) addIllegalFieldPointer(1, 4);

     }

     @Override

     protected long deserializeLogicalBlockAddress (ByteBuffer buffer) {

         return buffer.getLong(2);

     }

     @Override

     protected boolean deserializePartialMediumIndicator (ByteBuffer buffer) {

         return BitManip.getBit(buffer.get(14),// byte

                 0);// bitNumber

     }

     public byte getServiceAction () {

         return serviceAction;

     }

 }