| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| DefaultBeanFactory |
|
| 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 | } |