Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
When |
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| 1.8;1.8 |
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.contrib.components; | |
16 | ||
17 | import org.apache.hivemind.ApplicationRuntimeException; | |
18 | import org.apache.tapestry.IMarkupWriter; | |
19 | import org.apache.tapestry.IRequestCycle; | |
20 | import org.apache.tapestry.Tapestry; | |
21 | import org.apache.tapestry.components.Conditional; | |
22 | ||
23 | /** | |
24 | * Represents an alternative whithin a {@link Choose} component. | |
25 | * The default alternative is described by the Otherwise component. | |
26 | * | |
27 | * [<a href="../../../../../../ComponentReference/contrib.When.html">Component Reference</a>] | |
28 | * | |
29 | * @author David Solis | |
30 | * | |
31 | **/ | |
32 | 0 | public abstract class When extends Conditional |
33 | { | |
34 | /** Parent of this component. */ | |
35 | ||
36 | private Choose _choose; | |
37 | ||
38 | /** | |
39 | * Renders its wrapped components only if the condition is true and its parent {@link Choose} | |
40 | * allows it. In addition, if element is specified, can emulate that HTML element. | |
41 | * | |
42 | **/ | |
43 | ||
44 | protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) | |
45 | { | |
46 | 0 | Choose choose = getChoose(); |
47 | ||
48 | 0 | if (choose == null) |
49 | 0 | throw new ApplicationRuntimeException( |
50 | Tapestry.getMessage("When.must-be-contained-by-choose"), | |
51 | this, | |
52 | null, | |
53 | null); | |
54 | ||
55 | 0 | if (!choose.isConditionMet() && getCondition()) |
56 | { | |
57 | 0 | choose.setConditionMet(true); |
58 | 0 | super.renderComponent(writer, cycle); |
59 | } | |
60 | 0 | } |
61 | ||
62 | protected boolean evaluateCondition() | |
63 | { | |
64 | 0 | return true; |
65 | } | |
66 | ||
67 | public boolean getInvert() | |
68 | { | |
69 | // This component doesn't require invert parameter. | |
70 | 0 | return false; |
71 | } | |
72 | ||
73 | /** | |
74 | * @return Choose | |
75 | */ | |
76 | public Choose getChoose() | |
77 | { | |
78 | 0 | return _choose; |
79 | } | |
80 | ||
81 | /** | |
82 | * Sets the choose. | |
83 | * @param value The choose to set | |
84 | */ | |
85 | public void setChoose(Choose value) | |
86 | { | |
87 | 0 | _choose = value; |
88 | 0 | } |
89 | ||
90 | } |