Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
DefaultBeanFactory |
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| 1.0;1 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | package org.apache.commons.configuration.beanutils; | |
18 | ||
19 | /** | |
20 | * <p> | |
21 | * The default implementation of the <code>BeanFactory</code> interface. | |
22 | * </p> | |
23 | * <p> | |
24 | * This class creates beans of arbitrary types using reflection. Each time the | |
25 | * <code>createBean()</code> method is invoked, a new bean instance is | |
26 | * created. A default bean class is not supported. | |
27 | * </p> | |
28 | * <p> | |
29 | * An instance of this factory class will be set as the default bean factory for | |
30 | * the <code>{@link BeanHelper}</code> class. This means that if not bean | |
31 | * factory is specified in a <code>{@link BeanDeclaration}</code>, this | |
32 | * default instance will be used. | |
33 | * </p> | |
34 | * | |
35 | * @since 1.3 | |
36 | * @author Oliver Heger | |
37 | * @version $Id: DefaultBeanFactory.java 439648 2006-09-02 20:42:10Z oheger $ | |
38 | */ | |
39 | 22 | public class DefaultBeanFactory implements BeanFactory |
40 | { | |
41 | /** Stores the default instance of this class. */ | |
42 | 4 | public static final DefaultBeanFactory INSTANCE = new DefaultBeanFactory(); |
43 | ||
44 | /** | |
45 | * Creates a new bean instance. This implementation delegates to the | |
46 | * protected methods <code>createBeanInstance()</code> and | |
47 | * <code>initBeanInstance()</code> for creating and initializing the bean. | |
48 | * This makes it easier for derived classes that need to change specific | |
49 | * functionality of the base class. | |
50 | * | |
51 | * @param beanClass the class of the bean, from which an instance is to be | |
52 | * created | |
53 | * @param data the bean declaration object | |
54 | * @param parameter an additional parameter (ignored by this implementation) | |
55 | * @return the new bean instance | |
56 | * @throws Exception if an error occurs | |
57 | */ | |
58 | public Object createBean(Class beanClass, BeanDeclaration data, | |
59 | Object parameter) throws Exception | |
60 | { | |
61 | 92 | Object result = createBeanInstance(beanClass, data); |
62 | 92 | initBeanInstance(result, data); |
63 | 92 | return result; |
64 | } | |
65 | ||
66 | /** | |
67 | * Returns the default bean class used by this factory. This is always | |
68 | * <b>null</b> for this implementation. | |
69 | * | |
70 | * @return the default bean class | |
71 | */ | |
72 | public Class getDefaultBeanClass() | |
73 | { | |
74 | 1 | return null; |
75 | } | |
76 | ||
77 | /** | |
78 | * Creates the bean instance. This method is called by | |
79 | * <code>createBean()</code>. It uses reflection to create a new instance | |
80 | * of the specified class. | |
81 | * | |
82 | * @param beanClass the class of the bean to be created | |
83 | * @param data the bean declaration | |
84 | * @return the new bean instance | |
85 | * @throws Exception if an error occurs | |
86 | */ | |
87 | protected Object createBeanInstance(Class beanClass, BeanDeclaration data) | |
88 | throws Exception | |
89 | { | |
90 | 92 | return beanClass.newInstance(); |
91 | } | |
92 | ||
93 | /** | |
94 | * Initializes the newly created bean instance. This method is called by | |
95 | * <code>createBean()</code>. It calls the | |
96 | * <code>{@link BeanHelper#initBean(Object, BeanDeclaration) initBean()}</code> | |
97 | * of <code>{@link BeanHelper}</code> for performing the initialization. | |
98 | * | |
99 | * @param bean the newly created bean instance | |
100 | * @param data the bean declaration object | |
101 | * @throws Exception if an error occurs | |
102 | */ | |
103 | protected void initBeanInstance(Object bean, BeanDeclaration data) | |
104 | throws Exception | |
105 | { | |
106 | 92 | BeanHelper.initBean(bean, data); |
107 | 92 | } |
108 | } |