Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ComponentConstructorImpl |
|
| 2.0;2 |
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.enhance; | |
16 | ||
17 | import java.lang.reflect.Constructor; | |
18 | ||
19 | import org.apache.hivemind.ApplicationRuntimeException; | |
20 | import org.apache.hivemind.Location; | |
21 | import org.apache.hivemind.util.Defense; | |
22 | import org.apache.tapestry.services.ComponentConstructor; | |
23 | ||
24 | /** | |
25 | * @author Howard M. Lewis Ship | |
26 | * @since 4.0 | |
27 | */ | |
28 | public class ComponentConstructorImpl implements ComponentConstructor | |
29 | { | |
30 | private Location _location; | |
31 | ||
32 | private Constructor _constructor; | |
33 | ||
34 | private Object[] _parameters; | |
35 | ||
36 | private String _classFabString; | |
37 | ||
38 | /** | |
39 | * News instance of this class. | |
40 | * | |
41 | * @param constructor | |
42 | * the constructor method to invoke | |
43 | * @param parameters | |
44 | * the parameters to pass to the constructor. These are retained, not copied. | |
45 | * @param classFabString | |
46 | * a string representing the generated class information, used for exception | |
47 | * reporting | |
48 | * @param location | |
49 | * the location, used for exception reporting | |
50 | */ | |
51 | ||
52 | public ComponentConstructorImpl(Constructor constructor, Object[] parameters, | |
53 | String classFabString, Location location) | |
54 | 0 | { |
55 | 0 | Defense.notNull(constructor, "constructor"); |
56 | 0 | _constructor = constructor; |
57 | 0 | _parameters = parameters; |
58 | 0 | _classFabString = classFabString; |
59 | 0 | _location = location; |
60 | 0 | } |
61 | ||
62 | public Class getComponentClass() | |
63 | { | |
64 | 0 | return _constructor.getDeclaringClass(); |
65 | } | |
66 | ||
67 | public Object newInstance() | |
68 | { | |
69 | try | |
70 | { | |
71 | 0 | Object result = _constructor.newInstance(_parameters); |
72 | ||
73 | // Unlikely to generate an error if we can get through it once, so it's | |
74 | // safe to release the big classFabString | |
75 | ||
76 | 0 | _classFabString = null; |
77 | ||
78 | 0 | return result; |
79 | } | |
80 | 0 | catch (Throwable ex) |
81 | { | |
82 | 0 | throw new ApplicationRuntimeException(EnhanceMessages.instantiationFailure( |
83 | _constructor, | |
84 | _parameters, | |
85 | _classFabString, | |
86 | ex), null, _location, ex); | |
87 | } | |
88 | } | |
89 | ||
90 | } |