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1   /*
2    * Copyright 2002,2004 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  package org.apache.commons.jelly.tags.swing;
17  
18  import org.apache.commons.jelly.JellyTagException;
19  import org.apache.commons.jelly.expression.Expression;
20  import org.apache.commons.jelly.tags.core.UseBeanTag;
21  import org.apache.commons.jelly.tags.swing.model.ExpressionTableColumn;
22  
23  /***
24   * Creates a default TableColumnModel.
25   *
26   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
27   * @version $Revision: 155420 $
28   */
29  public class TableModelColumnTag extends UseBeanTag {
30  
31      public ExpressionTableColumn getColumn() {
32          return (ExpressionTableColumn) getBean();
33      }
34  
35      public Class getAttributeType(String name) throws JellyTagException {
36          if (name.equals("value")) {
37              return Expression.class;
38          }
39          return super.getAttributeType(name);
40      }
41  
42      // Implementation methods
43      //-------------------------------------------------------------------------
44      protected void processBean(String var, Object bean) throws JellyTagException {
45          super.processBean(var, bean);
46  
47          TableModelTag tag = (TableModelTag) findAncestorWithClass( TableModelTag.class );
48          if ( tag == null ) {
49              throw new JellyTagException( "This tag must be nested within a <tableModel> tag" );
50          }
51          tag.getTableModel().addColumn( getColumn() );
52      }
53  
54      protected Class getDefaultClass() {
55          return ExpressionTableColumn.class;
56      }
57  }
58