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1
21
24 package org.lobobrowser.util;
25
26
28 import java.beans.*;
29 import java.lang.reflect.Method  ;
30 import java.util.*;
31
32
35 public class Bean {
36 private final Class clazz;
38
39 public Bean(Class clazz) {
40 this.clazz = clazz;
41 }
42
43 private Map propertyDescriptors = null;
44
45 private void populateDescriptors(Map map, Class clazz) throws IntrospectionException {
46 BeanInfo beanInfo = Introspector.getBeanInfo(clazz);
47 PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();
48 for(int i = 0; i < pds.length; i++) {
49 map.put(pds[i].getName(), pds[i]);
50 }
51 if(clazz.isInterface()) {
52 java.lang.reflect.Type [] interfaces = clazz.getGenericInterfaces();
53 for(int i = 0; i < interfaces.length; i++) {
54 this.populateDescriptors(map, (Class ) interfaces[i]);
55 }
56 }
57 }
58
59 public PropertyDescriptor getPropertyDescriptor(String propertyName) throws IntrospectionException {
60 synchronized(this) {
61 if(this.propertyDescriptors == null) {
62 this.propertyDescriptors = new HashMap();
63 this.populateDescriptors(this.propertyDescriptors, this.clazz);
64 }
65 return (PropertyDescriptor) this.propertyDescriptors.get(propertyName);
66 }
67 }
68
69 public Map getPropertyDescriptorsMap() throws IntrospectionException {
70 synchronized(this) {
71 if(this.propertyDescriptors == null) {
72 this.propertyDescriptors = new HashMap();
73 this.populateDescriptors(this.propertyDescriptors, this.clazz);
74 }
75 return this.propertyDescriptors;
76 }
77 }
78
79 public PropertyDescriptor[] getPropertyDescriptors() throws IntrospectionException {
80 synchronized(this) {
81 return (PropertyDescriptor[]) this.getPropertyDescriptorsMap().values().toArray(new PropertyDescriptor[0]);
82 }
83 }
84
85 public void setPropertyForFQN(Object receiver, String fullyQualifiedPropertyName, Object value) throws Exception {
86 int idx = fullyQualifiedPropertyName.indexOf('.');
87 if(idx == -1) {
88 PropertyDescriptor pd = this.getPropertyDescriptor(fullyQualifiedPropertyName);
89 if(pd == null) {
90 throw new IllegalStateException ("Property '" + fullyQualifiedPropertyName + "' unknown");
91 }
92 Method method = pd.getWriteMethod();
93 if(method == null) {
94 throw new IllegalStateException ("Property '" + fullyQualifiedPropertyName + "' not settable");
95 }
96 Object actualValue = convertValue(value, pd.getPropertyType());
97 method.invoke(receiver, new Object [] { actualValue });
98 }
99 else {
100 String prefix = fullyQualifiedPropertyName.substring(0, idx);
101 PropertyDescriptor pinfo = this.getPropertyDescriptor(prefix);
102 if(pinfo == null) {
103 throw new IllegalStateException ("Property '" + prefix + "' unknown");
104 }
105 Method readMethod = pinfo.getReadMethod();
106 if(readMethod == null) {
107 throw new IllegalStateException ("Property '" + prefix + "' not readable");
108 }
109 Object newReceiver = readMethod.invoke(receiver, new Object [0]);
110 String nameRest = fullyQualifiedPropertyName.substring(idx + 1);
112 this.setPropertyForFQN(newReceiver, nameRest, value);
113 }
114 }
115
116 private static Object convertValue(Object value, Class targetType) {
117 boolean targetString = targetType.isAssignableFrom(String .class);
118 if(value instanceof String && targetString) {
119 }
121 else if(targetString) {
122 value = String.valueOf(value);
123 }
124 else if(!(value instanceof Byte ) && (targetType == Byte .class || targetType == byte.class)) {
125 value = Byte.valueOf(String.valueOf(value));
126 }
127 else if(!(value instanceof Boolean ) && (targetType == Boolean .class || targetType == boolean.class)) {
128 value = Boolean.valueOf(String.valueOf(value));
129 }
130 else if(!(value instanceof Short ) && (targetType == Short .class || targetType == short.class)) {
131 value = Short.valueOf(String.valueOf(value));
132 }
133 else if(!(value instanceof Integer ) && (targetType == Integer .class || targetType == int.class)) {
134 value = Integer.valueOf(String.valueOf(value));
135 }
136 else if(!(value instanceof Long ) && (targetType == Long .class || targetType == long.class)) {
137 value = Long.valueOf(String.valueOf(value));
138 }
139 return value;
140 }
141
142 }
143 |
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