com.sun.jersey.samples.atomserver.resources.EditOptimisiticEntryResource Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of simple-atom-server Show documentation
There is a newer version: 1.19.4
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.jersey.samples.atomserver.resources;

import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.io.FeedException;
import com.sun.jersey.api.ConflictException;
import com.sun.jersey.spi.MessageBodyWorkers;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;

/**
 *
 * @author [email protected]
 */
public class EditOptimisiticEntryResource extends EditEntryResource {
    private final UriBuilder editUriBuilder;
    
    public EditOptimisiticEntryResource(String entryId, int version, 
            UriInfo uriInfo, MessageBodyWorkers bodyContext) throws FeedException {
        super(entryId, uriInfo, bodyContext);
        
        // Get the edit link in the entry
        Feed f = AtomStore.getFeedDocument();
        Entry e = AtomStore.findEntry(entryId, f);        
        String editLink = AtomStore.getLink(e, "edit");
        
        // Compare against the requested link
        String editUri = uriInfo.getAbsolutePath().toString();
        if (!editUri.startsWith(editLink)) {
            // Response with 409 Conflict
            throw new ConflictException();
        }

        // Increment the version and update the edit URI
        int newVersion = version + 1;
        editUri = editUri.replaceFirst("/" + version + "/", 
                "/" + newVersion + "/");
        
        editUriBuilder = UriBuilder.fromUri(editUri);
    }    
    
    protected UriBuilder getUriBuilder() {
        return editUriBuilder;
    }
}