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