ItemLabelTag


1   package com.blandware.atleap.webapp.taglib.core.menu.context;
2   
3   import javax.servlet.jsp.JspException  ;
4   import javax.servlet.jsp.JspTagException  ;
5   import javax.servlet.jsp.tagext.JspFragment  ;
6   import javax.servlet.jsp.tagext.SimpleTagSupport  ;
7   import java.io.IOException  ;
8   
9   /**
10   * <p>Renders label for menu item. This tag is used to render additional label
11   * for context menu item, which must not appear on page.
12   * <br />
13   * This tag is only valid when nested within <em>itemEnabled</em> or
14   * <em>itemDisabled</em> tag.
15   * </p>
16   * <p/>
17   * <p><a HREF="MenuItemLabelTag.java.htm"><i>View Source</i></a></p>
18   *
19   * @author Sergey Zubtcovskii <a HREF="mailto:sergey.zubtcovskii@blandware.com">&lt;sergey.zubtcovskii@blandware.com&gt;</a>
20   * @version $Revision: 1.3 $ $Date: 2005/09/21 13:46:05 $
21   * @see ItemTag
22   * @see ItemLinkTag
23   * @jsp.tag name="itemLabel"
24   * body-content="scriptless"
25   */
26  public class ItemLabelTag extends SimpleTagSupport   {
27  
28      /**
29       * Creates new instance of ItemEnabledTag
30       */
31      public ItemLabelTag() {
32      }
33  
34      /**
35       * Processes the tag
36       *
37       * @throws JspException
38       * @throws IOException
39       */
40      public void doTag() throws JspException  , IOException   {
41          // search for parent ItemPart
42          ItemPart part = (ItemPart) findAncestorWithClass(this, ItemPart.class);
43          if ( part == null ) {
44              throw new JspTagException  ("This tag is only valid when nested within 'itemEnabled' or 'itemDisabled' tag");
45          }
46  
47          if ( part.getRenderingFlag() == ItemPart.FLAG_RENDER_TO_MENU ) {
48              // obtain and invoke body content
49              JspFragment   body = getJspBody();
50              if ( body != null ) {
51                  body.invoke(null);
52              }
53          }
54  
55      }
56  
57  }
58

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