org.petclinic.web.VisitsAtomView.java Source code

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Here is the source code for org.petclinic.web.VisitsAtomView.java

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/*
 * Copyright 2002-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.petclinic.web;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.petclinic.domain.Visit;
import org.springframework.web.servlet.view.feed.AbstractAtomFeedView;

import com.sun.syndication.feed.atom.Content;
import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;

/**
 * A view creating a Atom representation from a list of Visit objects. 
 * 
 * @author Alef Arendsen
 * @author Arjen Poutsma
 */
public class VisitsAtomView extends AbstractAtomFeedView {

    @Override
    protected void buildFeedMetadata(Map<String, Object> model, Feed feed, HttpServletRequest request) {
        feed.setId("tag:springsource.com");
        feed.setTitle("Pet Clinic Visits");
        @SuppressWarnings("unchecked")
        List<Visit> visits = (List<Visit>) model.get("visits");
        for (Visit visit : visits) {
            Date date = visit.getDate();
            if (feed.getUpdated() == null || date.compareTo(feed.getUpdated()) > 0) {
                feed.setUpdated(date);
            }
        }
    }

    @Override
    protected List<Entry> buildFeedEntries(Map<String, Object> model, HttpServletRequest request,
            HttpServletResponse response) throws Exception {

        @SuppressWarnings("unchecked")
        List<Visit> visits = (List<Visit>) model.get("visits");
        List<Entry> entries = new ArrayList<Entry>(visits.size());

        for (Visit visit : visits) {
            Entry entry = new Entry();
            String date = String.format("%1$tY-%1$tm-%1$td", visit.getDate());
            // see http://diveintomark.org/archives/2004/05/28/howto-atom-id#other
            entry.setId(String.format("tag:springsource.com,%s:%d", date, visit.getId()));
            entry.setTitle(String.format("%s visit on %s", visit.getPet().getName(), date));
            entry.setUpdated(visit.getDate());

            Content summary = new Content();
            summary.setValue(visit.getDescription());
            entry.setSummary(summary);

            entries.add(entry);
        }

        return entries;

    }

}