org.apache.roller.weblogger.ui.rendering.pagers.MediaFilesPager.java Source code

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Here is the source code for org.apache.roller.weblogger.ui.rendering.pagers.MediaFilesPager.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  The ASF licenses this file to You
 * 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.  For additional information regarding
 * copyright in this work, please see the NOTICE file in the top level
 * directory of this distribution.
 */

package org.apache.roller.weblogger.ui.rendering.pagers;

import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.roller.weblogger.business.MediaFileManager;
import org.apache.roller.weblogger.business.URLStrategy;
import org.apache.roller.weblogger.business.WebloggerFactory;
import org.apache.roller.weblogger.pojos.MediaFile;
import org.apache.roller.weblogger.pojos.Weblog;

/**
 * Paging through a collection of media files.
 */
public class MediaFilesPager extends AbstractPager {

    private static Log log = LogFactory.getLog(MediaFilesPager.class);

    private Weblog weblog = null;
    private int sinceDays = -1;
    private int length = 0;

    // the collection for the pager
    private List<MediaFile> mediaFiles;

    // are there more items?
    private boolean more = false;

    // most recent update time of current set of entries
    private Date lastUpdated = null;

    public MediaFilesPager(URLStrategy strat, String baseUrl, Weblog weblog, int sinceDays, int page, int length) {

        super(strat, baseUrl, page);

        this.weblog = weblog;
        this.sinceDays = sinceDays;
        this.length = length;

        // initialize the collection
        getItems();
    }

    public List<MediaFile> getItems() {

        if (this.mediaFiles == null) {
            // calculate offset
            //int offset = getPage() * length;

            List<MediaFile> results = new ArrayList<MediaFile>();

            try {
                MediaFileManager mgr = WebloggerFactory.getWeblogger().getMediaFileManager();
                results = mgr.fetchRecentPublicMediaFiles(length);
            } catch (Exception e) {
                log.error("ERROR: fetching comment list", e);
            }
            this.mediaFiles = results;
        }

        return this.mediaFiles;
    }

    public boolean hasMoreItems() {
        return more;
    }

    /** Get last updated time from items in pager */
    public Date getLastUpdated() {
        if (lastUpdated == null) {
            // feeds are sorted by pubtime, so first might not be last updated
            List<MediaFile> items = (List<MediaFile>) getItems();
            if (items != null && items.size() > 0) {
                Timestamp newest = ((MediaFile) items.get(0)).getLastUpdated();
                for (MediaFile file : items) {
                    if (file.getLastUpdated().after(newest)) {
                        newest = file.getLastUpdated();
                    }
                }
                lastUpdated = new Date(newest.getTime());
            } else {
                // no update so we assume it's brand new
                lastUpdated = new Date();
            }
        }
        return lastUpdated;
    }
}