Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ComponentTreeWalker |
|
| 3.0;3 |
1 | // Copyright 2004, 2005 The Apache Software Foundation | |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | // you may not use this file except in compliance with the License. | |
5 | // You may obtain a copy of the License at | |
6 | // | |
7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
8 | // | |
9 | // Unless required by applicable law or agreed to in writing, software | |
10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | // See the License for the specific language governing permissions and | |
13 | // limitations under the License. | |
14 | ||
15 | package org.apache.tapestry.pageload; | |
16 | ||
17 | import java.util.Collection; | |
18 | import java.util.Iterator; | |
19 | ||
20 | import org.apache.tapestry.IComponent; | |
21 | import org.apache.tapestry.Tapestry; | |
22 | ||
23 | /** | |
24 | * Walks through the tree of components and invokes the visitors on each of | |
25 | * of the components in the tree. | |
26 | * | |
27 | * @author mindbridge | |
28 | * @since 3.0 | |
29 | */ | |
30 | public class ComponentTreeWalker | |
31 | { | |
32 | private IComponentVisitor[] _visitors; | |
33 | ||
34 | public ComponentTreeWalker(IComponentVisitor[] visitors) | |
35 | 0 | { |
36 | 0 | _visitors = visitors; |
37 | 0 | } |
38 | ||
39 | public void walkComponentTree(IComponent component) | |
40 | { | |
41 | // Invoke visitors | |
42 | 0 | for (int i = 0; i < _visitors.length; i++) |
43 | { | |
44 | 0 | IComponentVisitor visitor = _visitors[i]; |
45 | 0 | visitor.visitComponent(component); |
46 | } | |
47 | ||
48 | // Recurse into the embedded components | |
49 | 0 | Collection components = component.getComponents().values(); |
50 | ||
51 | 0 | if (Tapestry.size(components) == 0) |
52 | 0 | return; |
53 | ||
54 | 0 | for (Iterator it = components.iterator(); it.hasNext();) |
55 | { | |
56 | 0 | IComponent embedded = (IComponent) it.next(); |
57 | 0 | walkComponentTree(embedded); |
58 | 0 | } |
59 | 0 | } |
60 | } |