| /* |
| * 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.util.ArrayList; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.roller.weblogger.business.URLStrategy; |
| import org.apache.roller.weblogger.business.Weblogger; |
| import org.apache.roller.weblogger.business.WebloggerFactory; |
| import org.apache.roller.weblogger.business.WeblogManager; |
| import org.apache.roller.weblogger.pojos.Weblog; |
| import org.apache.roller.weblogger.pojos.wrapper.WeblogWrapper; |
| |
| |
| /** |
| * Paging through a collection of weblogs. |
| */ |
| public class WeblogsPager extends AbstractPager { |
| |
| private static Log log = LogFactory.getLog(WeblogsPager.class); |
| |
| private String letter = null; |
| private int sinceDays = -1; |
| private int length = 0; |
| |
| // collection for the pager |
| private List<WeblogWrapper> weblogs; |
| |
| // are there more items? |
| private boolean more = false; |
| |
| |
| public WeblogsPager( |
| URLStrategy strat, |
| String baseUrl, |
| String locale, |
| int sinceDays, |
| int page, |
| int length) { |
| |
| super(strat, baseUrl, page); |
| |
| this.sinceDays = sinceDays; |
| this.length = length; |
| |
| // initialize the collection |
| getItems(); |
| } |
| |
| |
| public WeblogsPager( |
| URLStrategy strat, |
| String baseUrl, |
| String letter, |
| String locale, |
| int sinceDays, |
| int page, |
| int length) { |
| |
| super(strat, baseUrl, page); |
| |
| this.letter = letter; |
| this.sinceDays = sinceDays; |
| this.length = length; |
| |
| // initialize the collection |
| getItems(); |
| } |
| |
| |
| public String getNextLink() { |
| // need to add letter param if it exists |
| if(letter != null) { |
| int page = getPage() + 1; |
| if(hasMoreItems()) { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put("page", ""+page); |
| params.put("letter", letter); |
| return createURL(getUrl(), params); |
| } |
| return null; |
| } else { |
| return super.getNextLink(); |
| } |
| } |
| |
| |
| public String getPrevLink() { |
| // need to add letter param if it exists |
| if(letter != null) { |
| int page = getPage() - 1; |
| if (page >= 0) { |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put("page", ""+page); |
| params.put("letter", letter); |
| return createURL(getUrl(), params); |
| } |
| return null; |
| } else { |
| return super.getPrevLink(); |
| } |
| } |
| |
| |
| public List<WeblogWrapper> getItems() { |
| |
| if (weblogs == null) { |
| // calculate offset |
| int offset = getPage() * length; |
| |
| List<WeblogWrapper> results = new ArrayList<WeblogWrapper>(); |
| Date startDate = null; |
| if (sinceDays != -1) { |
| Calendar cal = Calendar.getInstance(); |
| cal.setTime(new Date()); |
| cal.add(Calendar.DATE, -1 * sinceDays); |
| startDate = cal.getTime(); |
| } |
| try { |
| Weblogger roller = WebloggerFactory.getWeblogger(); |
| WeblogManager wmgr = roller.getWeblogManager(); |
| List<Weblog> rawWeblogs; |
| if (letter == null) { |
| rawWeblogs = wmgr.getWeblogs(Boolean.TRUE, Boolean.TRUE, startDate, null, offset, length + 1); |
| } else { |
| rawWeblogs = wmgr.getWeblogsByLetter(letter.charAt(0), offset, length + 1); |
| } |
| |
| // wrap the results |
| int count = 0; |
| for (Weblog website : rawWeblogs) { |
| if (count++ < length) { |
| results.add(WeblogWrapper.wrap(website, urlStrategy)); |
| } else { |
| more = true; |
| } |
| } |
| |
| } catch (Exception e) { |
| log.error("ERROR: fetching weblog list", e); |
| } |
| |
| weblogs = results; |
| } |
| |
| return weblogs; |
| } |
| |
| |
| public boolean hasMoreItems() { |
| return more; |
| } |
| |
| } |