SelectMultipleConverter


1   /*
2    * ====================================================================
3    * This software is subject to the terms of the Common Public License
4    * Agreement, available at the following URL:
5    *   http://www.opensource.org/licenses/cpl.html .
6    * Copyright (C) 2003-2004 TONBELLER AG.
7    * All Rights Reserved.
8    * You must accept the terms of that agreement to use this software.
9    * ====================================================================
10   *
11   * 
12   */
13  package com.tonbeller.wcf.convert;
14  
15  import java.lang.reflect.InvocationTargetException  ;
16  import java.util.ArrayList  ;
17  import java.util.Iterator  ;
18  import java.util.List  ;
19  
20  import org.apache.commons.beanutils.PropertyUtils;
21  import org.w3c.dom.Element  ;
22  
23  import com.tonbeller.wcf.format.FormatException;
24  import com.tonbeller.wcf.format.FormatHandler;
25  import com.tonbeller.wcf.format.Formatter;
26  import com.tonbeller.wcf.ui.Item;
27  import com.tonbeller.wcf.ui.SelectMultiple;
28  
29  /**
30   * sets an array bean property. The values of all selected items are collected in an
31   * array and the bean property is set to that array. If no items are selected, the
32   * bean property will contain an empty array.
33   * <p>
34   * An items value is the value attribute of the elected item. 
35   * For type conversion the type, modelReference and formatString attributes
36   * will be taken from the items parent (e.g. the listBox).
37   * 
38   * @author av
39   */
40  public class SelectMultipleConverter extends SelectConverterBase {
41  
42    /**
43     * @see com.tonbeller.wcf.convert.SelectConverterBase#updateModelReference(Formatter, Map, Element, Object)
44     */
45    protected void updateModelReference(Formatter fmt, Element   elem, Object   bean)
46      throws FormatException, IllegalAccessException  , NoSuchMethodException  , InvocationTargetException   {
47  
48      String   model = SelectMultiple.getModelReference(elem);
49      if (model.length() == 0)
50        return;
51      
52      String   type = SelectMultiple.getType(elem);
53      String   formatString = SelectMultiple.getFormatString(elem);
54      FormatHandler parser = fmt.getHandler(type);
55      if (parser == null)
56        throw new FormatException("no handler found for type: " + type);
57      
58      List   items = SelectMultiple.getSelectedItems(elem);
59      checkRequired(fmt.getLocale(), elem, items.size() == 0);
60      List   values = new ArrayList  ();
61      
62      for (Iterator   it = items.iterator(); it.hasNext();) {
63        Element   item = (Element  )it.next();
64        String   valueString = Item.getValue(item);
65        Object   value = parser.parse(valueString, formatString);
66        values.add(value);
67      }
68      
69      PropertyUtils.setProperty(bean, model, parser.toNativeArray(values));
70    }
71  
72  
73  }
74
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