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package spi;

import impl.spi.DigestorAccessor;

import java.nio.ByteBuffer;

/**

 *

 * @author  Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 */

public abstract class Digestor<Data> {

   protected abstract byte[] digest(Data data);

   protected abstract Data create(String algorithm); 

   protected abstract void update(Data data, ByteBuffer input);

   static {

       new DigestorAccessor() {

            @Override

            protected <Data> byte[] digest(Digestor<Data> dig, Data data) {

                return dig.digest(data);

            }

            @Override

            protected <Data> Data create(Digestor<Data> dig, String algorithm) {

                return dig.create(algorithm);

            }

            @Override

            protected <Data> void update(Digestor<Data> dig, Data data, ByteBuffer input) {

                dig.update(data, input);

            }

        };

   }

}