| /* |
| * 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.struts2.pagers; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.roller.weblogger.pojos.WeblogEntry; |
| import org.apache.roller.weblogger.util.URLUtilities; |
| |
| |
| /** |
| * Paging through a collection of entries. |
| */ |
| public class EntriesPager { |
| |
| // the collection for the pager |
| private final List<WeblogEntry> items; |
| |
| // base url for the pager |
| private final String baseUrl; |
| |
| // what page we are on |
| private final int pageNum; |
| |
| // are there more items? |
| private final boolean moreItems; |
| |
| |
| public EntriesPager(String url, int page, List<WeblogEntry> entries, boolean hasMore) { |
| this.baseUrl = url; |
| this.pageNum = page; |
| this.items = entries; |
| this.moreItems = hasMore; |
| } |
| |
| |
| public String getNextLink() { |
| if(isMoreItems()) { |
| int nextPage = pageNum + 1; |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put("bean.page", ""+nextPage); |
| return createURL(baseUrl, params); |
| } |
| return null; |
| } |
| |
| |
| public String getPrevLink() { |
| if (pageNum > 0) { |
| int prevPage = pageNum - 1; |
| Map<String, String> params = new HashMap<String, String>(); |
| params.put("bean.page", ""+prevPage); |
| return createURL(baseUrl, params); |
| } |
| return null; |
| } |
| |
| |
| private String createURL(String base, Map<String, String> params) { |
| String qString = URLUtilities.getQueryString(params); |
| |
| if(base.indexOf('?') != -1) { |
| // if base url already has params them just append our query string |
| return base + "&" + qString.substring(1); |
| } else { |
| return base + qString; |
| } |
| } |
| |
| |
| public List<WeblogEntry> getItems() { |
| return items; |
| } |
| |
| public boolean isMoreItems() { |
| return moreItems; |
| } |
| |
| } |