jtulach@47: /*
jtulach@47:  * To change this template, choose Tools | Templates
jtulach@47:  * and open the template in the editor.
jtulach@47:  */
jtulach@47: 
jtulach@47: package org.apidesign.api.security;
jtulach@47: 
jtulach@47: import java.nio.ByteBuffer;
jtulach@47: import org.apidesign.spi.security.Digestor;
jtulach@47: 
jtulach@47: /**
jtulach@47:  *
jtulach@47:  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jtulach@47:  */
jtulach@47: final class DigestImplementation<Data> {
jtulach@47:     private static final DigestorAccessorImpl ACCESSOR = new DigestorAccessorImpl();
jtulach@47:     
jtulach@47:     private final Digestor<Data> digestor;
jtulach@47:     private final String algorithm;
jtulach@47:     private Data data;
jtulach@47:     
jtulach@47:     private DigestImplementation(Digestor<Data> digestor, String algorithm, Data d) {
jtulach@47:         this.digestor = digestor;
jtulach@47:         this.algorithm = algorithm;
jtulach@47:         this.data = d;
jtulach@47:     }
jtulach@47:     
jtulach@47:     static <Data> DigestImplementation create(Digestor<Data> digestor, String algorithm) {
jtulach@47:         Data d = ACCESSOR.create(digestor, algorithm);
jtulach@47:         if (d == null) {
jtulach@47:             return null;
jtulach@47:         } else {
jtulach@47:             return new DigestImplementation(digestor, algorithm, d);
jtulach@47:         }
jtulach@47:     }
jtulach@47: 
jtulach@47:     byte[] digest(ByteBuffer bb) {
jtulach@47:         ACCESSOR.update(digestor, data, bb);
jtulach@47:         return ACCESSOR.digest(digestor, data);
jtulach@47:     }
jtulach@47: }