1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package javax.faces.component;
20
21 import java.util.Arrays;
22 import java.util.Iterator;
23
24 import javax.faces.context.FacesContext;
25 import javax.faces.model.SelectItem;
26 import javax.faces.model.SelectItemGroup;
27
28 /**
29 * @author Mathias Broekelmann (latest modification by $Author: skitching $)
30 * @version $Revision: 676298 $ $Date: 2008-07-13 05:31:48 -0500 (Sun, 13 Jul 2008) $
31 */
32 class _SelectItemsUtil
33 {
34 public static interface _ValueConverter
35 {
36 Object getConvertedValue(FacesContext context, String value);
37 }
38
39 /**
40 * @param context the faces context
41 * @param value the value to check
42 * @param converter
43 * @param iterator contains instances of SelectItem
44 * @return if the value of a selectitem is equal to the given value
45 */
46 public static boolean matchValue(FacesContext context, Object value,
47 Iterator<SelectItem> selectItemsIter, _ValueConverter converter)
48 {
49 while (selectItemsIter.hasNext())
50 {
51 SelectItem item = selectItemsIter.next();
52 if (item instanceof SelectItemGroup)
53 {
54 SelectItemGroup itemgroup = (SelectItemGroup) item;
55 SelectItem[] selectItems = itemgroup.getSelectItems();
56 if (selectItems != null
57 && selectItems.length > 0
58 && matchValue(context, value, Arrays.asList(
59 selectItems).iterator(), converter))
60 {
61 return true;
62 }
63 }
64 else
65 {
66 Object itemValue = item.getValue();
67 if(converter != null && itemValue instanceof String)
68 {
69 itemValue = converter.getConvertedValue(context, (String)itemValue);
70 }
71 if (value==itemValue || value.equals(itemValue))
72 {
73 return true;
74 }
75 }
76 }
77 return false;
78 }
79 }