viewblogentriesbypageaction.java

### File Source: viewblogentriesbypageaction.java

             /*
        P/P   *  Method: net.sourceforge.pebble.web.action.ViewBlogEntriesByPageAction__static_init
              */
         1  /*
         2   * Copyright (c) 2003-2006, Simon Brown
         3   * All rights reserved.
         4   *
         5   * Redistribution and use in source and binary forms, with or without
         6   * modification, are permitted provided that the following conditions are met:
         7   *
         8   *   - Redistributions of source code must retain the above copyright
         9   *     notice, this list of conditions and the following disclaimer.
        10   *
        11   *   - Redistributions in binary form must reproduce the above copyright
        12   *     notice, this list of conditions and the following disclaimer in
        13   *     the documentation and/or other materials provided with the
        14   *     distribution.
        15   *
        16   *   - Neither the name of Pebble nor the names of its contributors may
        17   *     be used to endorse or promote products derived from this software
        18   *     without specific prior written permission.
        19   *
        20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
        21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
        24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        30   * POSSIBILITY OF SUCH DAMAGE.
        31   */
        32  package net.sourceforge.pebble.web.action;
        33
        34  import net.sourceforge.pebble.Constants;
        35  import net.sourceforge.pebble.domain.*;
        36  import net.sourceforge.pebble.util.SecurityUtils;
        37  import net.sourceforge.pebble.util.Pageable;
        38  import net.sourceforge.pebble.web.view.RedirectView;
        39  import net.sourceforge.pebble.web.view.View;
        40  import net.sourceforge.pebble.web.view.impl.BlogEntriesView;
        41
             /*
        P/P   *  Method: void net.sourceforge.pebble.web.action.ViewBlogEntriesByPageAction()
              */
        42  import javax.servlet.ServletException;
        43  import javax.servlet.http.HttpServletRequest;
        44  import javax.servlet.http.HttpServletResponse;
        45  import java.util.List;
        46
        47  /**
        48   * Views blog entries page by page. The page size is the same as the "number of
        49   * blog entries shown on the home page".
        50   *
        51   * @author    Simon Brown
        52   */
        53  public class ViewBlogEntriesByPageAction extends Action {
        54
        55    /**
        56     * Peforms the processing associated with this action.
        57     *
        58     * @param request     the HttpServletRequest instance.
        59     * @param response    the HttpServletResponse instance.
        60     * @return            the next View
        61     */
        62    public View process(HttpServletRequest request,
        63                        HttpServletResponse response)
        64        throws ServletException {
        65
                 /*
        P/P       *  Method: View process(HttpServletRequest, HttpServletResponse)
                  *
                  *  Preconditions:
                  *    this.model != null
                  *    this.model.data != null
                  *    (soft) request != null
                  *
                  *  Presumptions:
                  *    java.util.HashMap:get(...)@63 != null
                  *    java.util.List:get(...)@71 != null
                  *    net.sourceforge.pebble.domain.Blog:getBlogEntryIndex(...)@97 != null
                  *    net.sourceforge.pebble.domain.Blog:getBlogEntryIndex(...)@99 != null
                  *    net.sourceforge.pebble.domain.BlogManager:getInstance(...)@69 != null
                  *    ...
                  *
                  *  Postconditions:
                  *    return_value in Addr_Set{&new BlogEntriesView(process#5),&new BlogEntriesView(process#2),&new RedirectView(process#1)}
                  *    new BlogEntriesView(process#2) num objects <= 1
                  *    new BlogEntriesView(process#5) num objects <= 1
                  *    new RedirectView(process#1) num objects <= 1
                  *
                  *  Test Vectors:
                  *    java.util.List:size(...)@70: {-231..0, 2..232-1}, {1}
                  */
        66      AbstractBlog abstractBlog = (AbstractBlog)getModel().get(Constants.BLOG_KEY);
        67
        68      if (abstractBlog instanceof MultiBlog) {
        69        List publicBlogs = BlogManager.getInstance().getPublicBlogs();
        70        if (publicBlogs.size() == 1) {
        71          Blog blog = (Blog)publicBlogs.get(0);
        72          return new RedirectView(blog.getUrl());
        73        } else {
        74          getModel().put(Constants.BLOG_ENTRIES, abstractBlog.getRecentBlogEntries());
        75
        76          return new BlogEntriesView();
        77        }
        78      } else {
        79        Blog blog = (Blog)abstractBlog;
    +   80        int page = 1;
        81        try {
        82          page = Integer.parseInt(request.getParameter("page"));
        83        } catch (NumberFormatException nfe) {
        84          page = 1;
        85        }
        86        boolean publishedOnly = true;
        87        if (SecurityUtils.isUserAuthorisedForBlog(blog)) {
        88          publishedOnly = false;
        89        }
        90
        91        getModel().put(Constants.MONTHLY_BLOG, blog.getBlogForThisMonth());
        92        getModel().put("displayMode", "page");
        93        getModel().put("page", page);
        94
        95        Pageable<String> pageable;
        96        if (publishedOnly) {
        97          pageable = new Pageable<String>(blog.getBlogEntryIndex().getPublishedBlogEntries());
        98        } else {
        99          pageable = new Pageable<String>(blog.getBlogEntryIndex().getBlogEntries());
       100        }
       101
       102        pageable.setPageSize(blog.getRecentBlogEntriesOnHomePage());
       103        pageable.setPage(page);
       104        List<String> blogEntryIds = pageable.getListForPage();
       105        List<BlogEntry> blogEntries = blog.getBlogEntries(blogEntryIds);
       106
       107        getModel().put(Constants.BLOG_ENTRIES, blogEntries);
       108        getModel().put("pageable", pageable);
       109
       110        return new BlogEntriesView();
       111      }
       112    }
       113
       114  }

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viewblogentriesbypageaction.java | 2010-Jun-25 19:40:34
viewblogentriesbypageaction.class | 2010-Jul-19 20:23:38