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| 7 |  |  | 
| 8 |  | package org.dom4j.bean; | 
| 9 |  |  | 
| 10 |  | import java.beans.BeanInfo; | 
| 11 |  | import java.beans.IntrospectionException; | 
| 12 |  | import java.beans.Introspector; | 
| 13 |  | import java.beans.PropertyDescriptor; | 
| 14 |  | import java.lang.reflect.Method; | 
| 15 |  | import java.util.HashMap; | 
| 16 |  | import java.util.Map; | 
| 17 |  |  | 
| 18 |  | import org.dom4j.DocumentFactory; | 
| 19 |  | import org.dom4j.QName; | 
| 20 |  |  | 
| 21 |  |  | 
| 22 |  |  | 
| 23 |  |  | 
| 24 |  |  | 
| 25 |  |  | 
| 26 |  |  | 
| 27 |  |  | 
| 28 |  |  | 
| 29 |  | public class BeanMetaData { | 
| 30 |  |  | 
| 31 |  | protected static final Object[] NULL_ARGS = {}; | 
| 32 |  |  | 
| 33 |  |  | 
| 34 |  | private static Map singletonCache = new HashMap(); | 
| 35 |  |  | 
| 36 |  | private static final DocumentFactory DOCUMENT_FACTORY = BeanDocumentFactory | 
| 37 |  | .getInstance(); | 
| 38 |  |  | 
| 39 |  |  | 
| 40 |  | private Class beanClass; | 
| 41 |  |  | 
| 42 |  |  | 
| 43 |  | private PropertyDescriptor[] propertyDescriptors; | 
| 44 |  |  | 
| 45 |  |  | 
| 46 |  | private QName[] qNames; | 
| 47 |  |  | 
| 48 |  |  | 
| 49 |  | private Method[] readMethods; | 
| 50 |  |  | 
| 51 |  |  | 
| 52 |  | private Method[] writeMethods; | 
| 53 |  |  | 
| 54 |  |  | 
| 55 |  | private Map nameMap = new HashMap(); | 
| 56 |  |  | 
| 57 | 1 | public BeanMetaData(Class beanClass) { | 
| 58 | 1 | this.beanClass = beanClass; | 
| 59 |  |  | 
| 60 | 1 | if (beanClass != null) { | 
| 61 | 1 | try { | 
| 62 | 1 | BeanInfo beanInfo = Introspector.getBeanInfo(beanClass); | 
| 63 | 1 | propertyDescriptors = beanInfo.getPropertyDescriptors(); | 
| 64 |  | } catch (IntrospectionException e) { | 
| 65 | 0 | handleException(e); | 
| 66 |  | } | 
| 67 |  | } | 
| 68 |  |  | 
| 69 | 1 | if (propertyDescriptors == null) { | 
| 70 | 0 | propertyDescriptors = new PropertyDescriptor[0]; | 
| 71 |  | } | 
| 72 |  |  | 
| 73 | 1 | int size = propertyDescriptors.length; | 
| 74 | 1 | qNames = new QName[size]; | 
| 75 | 1 | readMethods = new Method[size]; | 
| 76 | 1 | writeMethods = new Method[size]; | 
| 77 |  |  | 
| 78 | 1 | for (int i = 0; i < size; i++) { | 
| 79 | 59 | PropertyDescriptor propertyDescriptor = propertyDescriptors[i]; | 
| 80 | 59 | String name = propertyDescriptor.getName(); | 
| 81 | 59 | QName qName = DOCUMENT_FACTORY.createQName(name); | 
| 82 | 59 | qNames[i] = qName; | 
| 83 | 59 | readMethods[i] = propertyDescriptor.getReadMethod(); | 
| 84 | 59 | writeMethods[i] = propertyDescriptor.getWriteMethod(); | 
| 85 |  |  | 
| 86 | 59 | Integer index = new Integer(i); | 
| 87 | 59 | nameMap.put(name, index); | 
| 88 | 59 | nameMap.put(qName, index); | 
| 89 |  | } | 
| 90 |  | } | 
| 91 |  |  | 
| 92 |  |  | 
| 93 |  |  | 
| 94 |  |  | 
| 95 |  |  | 
| 96 |  |  | 
| 97 |  |  | 
| 98 |  |  | 
| 99 |  |  | 
| 100 | 2 | public static BeanMetaData get(Class beanClass) { | 
| 101 | 2 | BeanMetaData answer = (BeanMetaData) singletonCache.get(beanClass); | 
| 102 |  |  | 
| 103 | 2 | if (answer == null) { | 
| 104 | 1 | answer = new BeanMetaData(beanClass); | 
| 105 | 1 | singletonCache.put(beanClass, answer); | 
| 106 |  | } | 
| 107 |  |  | 
| 108 | 2 | return answer; | 
| 109 |  | } | 
| 110 |  |  | 
| 111 |  |  | 
| 112 |  |  | 
| 113 |  |  | 
| 114 |  |  | 
| 115 |  |  | 
| 116 | 2 | public int attributeCount() { | 
| 117 | 2 | return propertyDescriptors.length; | 
| 118 |  | } | 
| 119 |  |  | 
| 120 | 0 | public BeanAttributeList createAttributeList(BeanElement parent) { | 
| 121 | 0 | return new BeanAttributeList(parent, this); | 
| 122 |  | } | 
| 123 |  |  | 
| 124 | 0 | public QName getQName(int index) { | 
| 125 | 0 | return qNames[index]; | 
| 126 |  | } | 
| 127 |  |  | 
| 128 | 2 | public int getIndex(String name) { | 
| 129 | 2 | Integer index = (Integer) nameMap.get(name); | 
| 130 |  |  | 
| 131 | 2 | return (index != null) ? index.intValue() : (-1); | 
| 132 |  | } | 
| 133 |  |  | 
| 134 | 0 | public int getIndex(QName qName) { | 
| 135 | 0 | Integer index = (Integer) nameMap.get(qName); | 
| 136 |  |  | 
| 137 | 0 | return (index != null) ? index.intValue() : (-1); | 
| 138 |  | } | 
| 139 |  |  | 
| 140 | 0 | public Object getData(int index, Object bean) { | 
| 141 | 0 | try { | 
| 142 | 0 | Method method = readMethods[index]; | 
| 143 |  |  | 
| 144 | 0 | return method.invoke(bean, NULL_ARGS); | 
| 145 |  | } catch (Exception e) { | 
| 146 | 0 | handleException(e); | 
| 147 |  |  | 
| 148 | 0 | return null; | 
| 149 |  | } | 
| 150 |  | } | 
| 151 |  |  | 
| 152 | 2 | public void setData(int index, Object bean, Object data) { | 
| 153 | 2 | try { | 
| 154 | 2 | Method method = writeMethods[index]; | 
| 155 | 2 | Object[] args = {data}; | 
| 156 | 2 | method.invoke(bean, args); | 
| 157 |  | } catch (Exception e) { | 
| 158 | 0 | handleException(e); | 
| 159 |  | } | 
| 160 |  | } | 
| 161 |  |  | 
| 162 |  |  | 
| 163 |  |  | 
| 164 | 0 | protected void handleException(Exception e) { | 
| 165 |  |  | 
| 166 |  | } | 
| 167 |  | } | 
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