@@ -0,0 +1,1130 @@
+/*%0A * Copyright 2016 Amherst College%0A *%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0Apackage edu.amherst.acdc.trellis.spi;%0A%0Aimport java.util.Optional;%0A%0Aimport edu.amherst.acdc.trellis.api.Session;%0Aimport org.apache.commons.rdf.api.IRI;%0A%0A/**%0A * @author acoburn%0A */%0Apublic interface FixityService %7B%0A%0A    /**%0A     * Compute the fixity of a resource%0A     * @param session the session%0A     * @param identifier the resource identifier%0A     * @param algorithm the algorithm to use%0A     * @return the digest%0A     */%0A    Optional%3CString%3E computeDigest(final Session session, final IRI identifier, final String algorithm);%0A%0A%7D%0A

add fixity service