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
20 package org.apache.myfaces.tobago.internal.util;
21
22 import javax.faces.component.NamingContainer;
23 import javax.faces.component.UIComponent;
24
25 // Will be normally called via ComponentUtils.
26 public class FindComponentUtils {
27
28 public static UIComponent findComponent(UIComponent from, String relativeId) {
29 int idLength = relativeId.length();
30 if (idLength > 0 && relativeId.charAt(0) == '@') {
31 if (relativeId.equals("@this")) {
32 return from;
33 }
34 }
35
36 // Figure out how many colons
37 int colonCount = 0;
38 while (colonCount < idLength) {
39 if (relativeId.charAt(colonCount) != NamingContainer.SEPARATOR_CHAR) {
40 break;
41 }
42 colonCount++;
43 }
44
45 // colonCount == 0: fully relative
46 // colonCount == 1: absolute (still normal findComponent syntax)
47 // colonCount > 1: for each extra colon after 1, go up a naming container
48 // (to the view root, if naming containers run out)
49 if (colonCount > 1) {
50 relativeId = relativeId.substring(colonCount);
51 for (int j = 1; j < colonCount; j++) {
52 while (from.getParent() != null) {
53 from = from.getParent();
54 if (from instanceof NamingContainer) {
55 break;
56 }
57 }
58 }
59 }
60 return from.findComponent(relativeId);
61 }
62 }