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Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
DirectCallback.java | 100% | 100% | 100% | 100% |
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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.callback; | |
16 | ||
17 | import org.apache.hivemind.ApplicationRuntimeException; | |
18 | import org.apache.hivemind.util.Defense; | |
19 | import org.apache.tapestry.IComponent; | |
20 | import org.apache.tapestry.IDirect; | |
21 | import org.apache.tapestry.IPage; | |
22 | import org.apache.tapestry.IRequestCycle; | |
23 | ||
24 | /** | |
25 | * Simple callback for re-invoking a {@link IDirect} trigger. | |
26 | * | |
27 | * @author Howard Lewis Ship | |
28 | * @since 0.2.9 | |
29 | */ | |
30 | ||
31 | public class DirectCallback implements ICallback | |
32 | { | |
33 | /** | |
34 | * @since 2.0.4 | |
35 | */ | |
36 | ||
37 | private static final long serialVersionUID = -8888847655917503471L; | |
38 | ||
39 | private String _pageName; | |
40 | ||
41 | private String _componentIdPath; | |
42 | ||
43 | private Object[] _parameters; | |
44 | ||
45 | 4 | public String toString() |
46 | { | |
47 | 4 | StringBuffer buffer = new StringBuffer("DirectCallback["); |
48 | ||
49 | 4 | buffer.append(_pageName); |
50 | 4 | buffer.append('/'); |
51 | 4 | buffer.append(_componentIdPath); |
52 | ||
53 | 4 | if (_parameters != null) |
54 | { | |
55 | 2 | for (int i = 0; i < _parameters.length; i++) |
56 | { | |
57 | 5 | buffer.append(i == 0 ? " " : ", "); |
58 | 5 | buffer.append(_parameters[i]); |
59 | } | |
60 | } | |
61 | ||
62 | 4 | buffer.append(']'); |
63 | ||
64 | 4 | return buffer.toString(); |
65 | ||
66 | } | |
67 | ||
68 | /** | |
69 | * Creates a new DirectCallback for the component. The parameters (which may be null) is | |
70 | * retained, not copied. | |
71 | */ | |
72 | ||
73 | 4 | public DirectCallback(IDirect component, Object[] parameters) |
74 | { | |
75 | 4 | Defense.notNull(component, "component"); |
76 | ||
77 | 4 | _pageName = component.getPage().getPageName(); |
78 | 4 | _componentIdPath = component.getIdPath(); |
79 | 4 | _parameters = parameters; |
80 | } | |
81 | ||
82 | /** | |
83 | * Locates the {@link IDirect}component that was previously identified (and whose page and id | |
84 | * path were stored). Invokes {@link IRequestCycle#setListenerParameters(Object[])(Object[])}to | |
85 | * restore the service parameters, then invokes {@link IDirect#trigger(IRequestCycle)}on the | |
86 | * component. | |
87 | */ | |
88 | ||
89 | 4 | public void performCallback(IRequestCycle cycle) |
90 | { | |
91 | 4 | IPage page = cycle.getPage(_pageName); |
92 | 4 | IComponent component = page.getNestedComponent(_componentIdPath); |
93 | 4 | IDirect direct = null; |
94 | ||
95 | 4 | try |
96 | { | |
97 | 4 | direct = (IDirect) component; |
98 | } | |
99 | catch (ClassCastException ex) | |
100 | { | |
101 | 1 | throw new ApplicationRuntimeException(CallbackMessages.componentNotDirect(component), |
102 | component, null, ex); | |
103 | } | |
104 | ||
105 | 3 | cycle.setListenerParameters(_parameters); |
106 | 3 | direct.trigger(cycle); |
107 | } | |
108 | } |
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