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 package org.apidesign.spi.security;

 import org.apidesign.impl.security.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);

             }

         };

    }

 }