1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/messagedigest/src-new-spi/org/apidesign/impl/security/spi/DigestorAccessor.java	Sat Jun 14 09:52:23 2008 +0200
     1.3 @@ -0,0 +1,35 @@
     1.4 +/*
     1.5 + * To change this template, choose Tools | Templates
     1.6 + * and open the template in the editor.
     1.7 + */
     1.8 +
     1.9 +package org.apidesign.impl.security.spi;
    1.10 +
    1.11 +import java.nio.ByteBuffer;
    1.12 +import org.apidesign.spi.security.Digestor;
    1.13 +
    1.14 +/**
    1.15 + *
    1.16 + * @author jarda
    1.17 + */
    1.18 +public abstract class DigestorAccessor {
    1.19 +    private static DigestorAccessor INSTANCE;
    1.20 +    
    1.21 +    protected DigestorAccessor() {
    1.22 +        assert INSTANCE == null;
    1.23 +        INSTANCE = this;
    1.24 +    }
    1.25 +    
    1.26 +    public static DigestorAccessor getDefault() {
    1.27 +        try {
    1.28 +            Class.forName(Digestor.class.getName(), true, DigestorAccessor.class.getClassLoader());
    1.29 +            return INSTANCE;
    1.30 +        } catch (ClassNotFoundException ex) {
    1.31 +            throw new IllegalStateException(ex);
    1.32 +        }
    1.33 +    }
    1.34 +    
    1.35 +    protected abstract <Data> byte[] digest(Digestor<Data> dig, Data data);
    1.36 +    protected abstract <Data> Data create(Digestor<Data> dig, String algorithm); 
    1.37 +    protected abstract <Data> void update(Digestor<Data> dig, Data data, ByteBuffer input);
    1.38 +}