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 package test;

 import java.nio.ByteBuffer;

 import org.apidesign.spi.security.Digestor;

 /**

  *

  * @author jarda

  */

 public final class CountingDigestor extends Digestor<int[]> {

     @Override

     protected byte[] digest(int[] data) {

         int i = data[0];

         byte[] arr = { (byte) (i & 255), (byte) ((i >> 8) & 255), (byte) ((i >> 16) & 255), (byte) ((i >> 24) & 255) };

         return arr;

     }

     @Override

     protected int[] create(String algorithm) {

         return "cnt".equals(algorithm) ? new int[1] : null; // NOI18N

     }

     @Override

     protected void update(int[] data, ByteBuffer input) {

         data[0] += input.remaining();

         input.position(input.position() + input.remaining());

     }

 }