/* 
    P/P   *  Method: net.sourceforge.pebble.web.tagext.IsBlogOwnerTag__static_init
          */
     1  /*
     2   * Copyright (c) 2003-2005, 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.tagext;
    33  
    34  import net.sourceforge.pebble.Constants;
    35  import net.sourceforge.pebble.domain.Blog;
    36  import net.sourceforge.pebble.domain.AbstractBlog;
    37  import net.sourceforge.pebble.util.SecurityUtils;
    38  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.tagext.IsBlogOwnerTag()
          */
    39  import javax.servlet.http.HttpServletRequest;
    40  import javax.servlet.jsp.JspException;
    41  import javax.servlet.jsp.tagext.TagSupport;
    42  
    43  /**
    44   * A custom tag that includes its body content if the current user belongs to
    45   * the "blog owner" role for the blog.
    46   *
    47   * @author    Simon Brown
    48   */
    49  public class IsBlogOwnerTag extends TagSupport {
    50  
    51    /**
    52     * Implementation from the Tag interface - this is called when the opening tag
    53     * is encountered.
    54     *
    55     * @return  an integer specifying what to do afterwards
    56     * @throws  JspException    if something goes wrong
    57     */
           /* 
    P/P     *  Method: int doStartTag()
            * 
            *  Preconditions:
            *    this.pageContext != null
            * 
            *  Presumptions:
            *    javax.servlet.jsp.PageContext:getRequest(...)@59 != null
            * 
            *  Postconditions:
            *    return_value in 0..1
            */
    58    public int doStartTag() throws JspException {
    59      HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
    60      AbstractBlog abstractBlog = (AbstractBlog)request.getAttribute(Constants.BLOG_KEY);
    61  
    62      if (abstractBlog instanceof Blog) {
    63        Blog blog = (Blog)abstractBlog;
    64        if (SecurityUtils.isUserAuthorisedForBlogAsBlogOwner(blog)) {
    65          return EVAL_BODY_INCLUDE;
    66        }
    67      }
    68  
    69      return SKIP_BODY;
    70    }
    71  
    72  }