TreeLabel


1   /*
2    * Copyright 2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   *
16   * $Header:$
17   */
18  package org.apache.beehive.netui.tags.tree;
19  
20  import org.apache.beehive.netui.tags.AbstractSimpleTag;
21  import org.apache.beehive.netui.util.logging.Logger;
22  
23  import javax.servlet.jsp.JspException  ;
24  import java.io.IOException  ;
25  
26  /**
27   * @jsptagref.tagdescription Set the text displayed for the selection link the given tree node (the TreeItem tag).
28   *
29   * <p>Note that a <code>&lt;netui:treeLabel></code> tag is required for all non-leaf nodes in the tree.</p> 
30   * @netui:tag name="treeLabel"  body-content="scriptless" description="Set the label for the parent TreeItem."
31   * @see org.apache.beehive.netui.tags.tree.Tree
32   * @see org.apache.beehive.netui.tags.tree.TreeElement
33   */
34  public class TreeLabel extends AbstractSimpleTag
35  {
36      private static final Logger logger = Logger.getInstance(TreeLabel.class);
37  
38      private String   _text;
39  
40      /**
41       * Return the name of the Tag.
42       */
43      public String   getTagName()
44      {
45          return "TreeLabel";
46      }
47  
48      /**
49       * Add this node to the parent.
50       * @throws JspException if a JSP exception has occurred
51       */
52      public void doTag()
53              throws JspException  , IOException  
54      {
55          String   value = getBufferBody(true);
56          if (value.length() > 0)
57              _text = value;
58  
59          Object   o = getParent();
60          assert (o != null);
61          if (!(o instanceof TreeItem)) {
62              logger.error("Invalid Parent (expected a TreeItem):" + o.getClass().getName());
63              return;
64          }
65  
66          // assign the value to the parent's label value
67          TreeItem ti = (TreeItem) o;
68          ti.setItemLabel(_text);
69      }
70  }
71
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