001/**
002 * Copyright 2015 DuraSpace, Inc.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.fcrepo.http.commons.exceptionhandlers;
017
018import static javax.ws.rs.core.Response.status;
019import static javax.ws.rs.core.Response.Status.BAD_REQUEST;
020import static org.fcrepo.kernel.RdfLexicon.CONSTRAINED_BY;
021
022import javax.ws.rs.core.Link;
023import javax.ws.rs.core.Response;
024import javax.ws.rs.ext.ExceptionMapper;
025import javax.ws.rs.ext.Provider;
026
027import org.fcrepo.kernel.exception.MalformedRdfException;
028
029import org.apache.commons.codec.binary.Base64;
030
031/**
032 * @author cabeer
033 * @since 9/30/14
034 */
035@Provider
036public class MalformedRdfExceptionMapper implements ExceptionMapper<MalformedRdfException> {
037
038    @Override
039    public Response toResponse(final MalformedRdfException e) {
040        final Link link = Link.fromUri(getConstraintUri(e)).rel(CONSTRAINED_BY.getURI()).build();
041        final String msg = e.getMessage();
042        if (msg.matches(".*org.*Exception: .*")) {
043            return status(BAD_REQUEST).entity(msg.replaceAll("org.*Exception: ", "")).links(link).build();
044        }
045        return status(BAD_REQUEST).entity(msg).links(link).build();
046    }
047
048    private static String getConstraintUri(final MalformedRdfException e) {
049        return "data:text/plain;base64," + Base64.encodeBase64String(e.getMessage().getBytes());
050    }
051}