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 package org.apidesign.impl.security.extension;

 import java.nio.ByteBuffer;

 import java.security.MessageDigest;

 import java.security.NoSuchAlgorithmException;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import org.apidesign.spi.security.Digestor;

 /**

  *

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

  */

 // BEGIN: day.end.bridges.BridgeToNew

 public class BridgeToNew extends Digestor<MessageDigest> {

     /** initializes the other bridge, and allow us to eliminate stack overflow */

     private static final BridgeToOld oldBridge = new BridgeToOld();

     @Override

     protected MessageDigest create(String algorithm) {

         // BEGIN: day.end.bridges.cyclecheck

         if (oldBridge.isSearching()) {

             // if the call is initiated from the other bridge, do not do

             // any delegation

             return null;

         }

         // END: day.end.bridges.cyclecheck

         try {

             return MessageDigest.getInstance(algorithm);

         } catch (NoSuchAlgorithmException ex) {

             Logger.getLogger(BridgeToNew.class.getName()).log(Level.FINE, "Cannot find " + algorithm, ex);

             return null;

         }

     }

     @Override

     protected byte[] digest(MessageDigest data) {

         return data.digest();

     }

     @Override

     protected void update(MessageDigest data, ByteBuffer input) {

         data.update(input);

     }

     static {

         new BridgeToOld();

     }

 }

 // END: day.end.bridges.BridgeToNew