Classes in this File | Line Coverage | Branch Coverage | Complexity | |||||||
ComponentConstructorImpl |
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| 2.0;2 |
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.enhance; |
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16 | ||
17 | import java.lang.reflect.Constructor; |
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18 | ||
19 | import org.apache.hivemind.ApplicationRuntimeException; |
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20 | import org.apache.hivemind.Location; |
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21 | import org.apache.hivemind.util.Defense; |
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22 | import org.apache.tapestry.services.ComponentConstructor; |
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23 | ||
24 | /** |
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25 | * @author Howard M. Lewis Ship |
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26 | * @since 4.0 |
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27 | */ |
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28 | public class ComponentConstructorImpl implements ComponentConstructor |
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29 | { |
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30 | private Location _location; |
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31 | ||
32 | private Constructor _constructor; |
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33 | ||
34 | private Object[] _parameters; |
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35 | ||
36 | private String _classFabString; |
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37 | ||
38 | /** |
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39 | * News instance of this class. |
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40 | * |
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41 | * @param constructor |
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42 | * the constructor method to invoke |
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43 | * @param parameters |
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44 | * the parameters to pass to the constructor. These are retained, not copied. |
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45 | * @param classFabString |
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46 | * a string representing the generated class information, used for exception |
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47 | * reporting |
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48 | * @param location |
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49 | * the location, used for exception reporting |
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50 | */ |
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51 | ||
52 | public ComponentConstructorImpl(Constructor constructor, Object[] parameters, |
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53 | String classFabString, Location location) |
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54 | 115 | { |
55 | 115 | Defense.notNull(constructor, "constructor"); |
56 | 115 | _constructor = constructor; |
57 | 115 | _parameters = parameters; |
58 | 115 | _classFabString = classFabString; |
59 | 115 | _location = location; |
60 | 115 | } |
61 | ||
62 | public Class getComponentClass() |
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63 | { |
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64 | 0 | return _constructor.getDeclaringClass(); |
65 | } |
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66 | ||
67 | public Object newInstance() |
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68 | { |
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69 | try |
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70 | { |
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71 | 242 | Object result = _constructor.newInstance(_parameters); |
72 | ||
73 | // Unlikely to generate an error if we can get through it once, so it's |
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74 | // safe to release the big classFabString |
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75 | ||
76 | 241 | _classFabString = null; |
77 | ||
78 | 241 | return result; |
79 | } |
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80 | 1 | catch (Throwable ex) |
81 | { |
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82 | 1 | throw new ApplicationRuntimeException(EnhanceMessages.instantiationFailure( |
83 | _constructor, |
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84 | _parameters, |
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85 | _classFabString, |
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86 | ex), null, _location, ex); |
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87 | } |
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88 | } |
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89 | ||
90 | } |