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