package org.jscsi.target.scsi.modeSense;

 import java.nio.ByteBuffer;

 import org.jscsi.target.util.BitManip;

 import org.jscsi.target.util.ReadWrite;

 /**

  * A {@link ModeParameterHeader} sub-class. Instances of this class are sent in response to <code>MODE SENSE (10)</code>

  * SCSI commands and have a serialized length of 8 bytes.

  * 

  * @see LongLogicalBlockDescriptor

  * @author Andreas Ergenzinger

  */

 public final class ModeParameterHeader10 extends ModeParameterHeader {

     /**

      * The length of this object when serialized.

      */

     static final int SIZE = 8;

     /**

      * The length in bytes of the MODE DATA LENGTH field.

      */

     static final int MODE_DATA_LENGTH_FIELD_SIZE = 2;

     /**

      * If the Long LBA (LONGLBA) bit is set to zero, the MODE PARAMETER BLOCK DESCRIPTOR(s), if any, are each eight

      * bytes long and have the format described in SPC-3. If the LONGLBA bit is set to one, the mode parameter block

      * descriptor(s), if any, are each sixteen bytes long and have a format described in a non-general command standard.

      */

     private final boolean longLba;

     /**

      * The constructor.

      * 

      * @param modeDataLength the total length in bytes of all MODE DATA list elements

      * @param blockDescriptorLength the total length in bytes of all BLOCK DESCRIPTOR list elements

      * @param longLba if <code>true</code> then the LONG LBA MODE PAREMETER LOGICAL BLOCK DESCRIPTOR format will be used

      * @see LongLogicalBlockDescriptor

      * @see ShortLogicalBlockDescriptor

      */

     public ModeParameterHeader10 (final int modeDataLength, final int blockDescriptorLength, final boolean longLba) {

         super(modeDataLength, blockDescriptorLength);

         this.longLba = longLba;

     }

     public void serialize (final ByteBuffer byteBuffer, final int index) {

         ReadWrite.writeTwoByteInt(byteBuffer,// buffer

                 modeDataLength,// value

                 index);// index

         byteBuffer.position(index + 2);

         byteBuffer.put(mediumType);

         byteBuffer.put(deviceSpecificParameter);

         final byte zeroByte = 0;

         byteBuffer.put(BitManip.getByteWithBitSet(zeroByte, 0, longLba));

         byteBuffer.put(zeroByte);

         ReadWrite.writeTwoByteInt(byteBuffer,// buffer

                 blockDescriptorLength,// value

                 index + 6);// index

     }

     public int size () {

         return SIZE;

     }

 }