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package org.ini4j.spi; |
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|
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import java.beans.Introspector; |
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import java.beans.PropertyChangeListener; |
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import java.beans.PropertyChangeSupport; |
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import java.beans.PropertyVetoException; |
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import java.beans.VetoableChangeListener; |
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import java.beans.VetoableChangeSupport; |
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|
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import java.lang.reflect.Array; |
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import java.lang.reflect.InvocationHandler; |
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import java.lang.reflect.Method; |
28 | |
|
29 | 213 | public abstract class AbstractBeanInvocationHandler implements InvocationHandler |
30 | |
{ |
31 | |
private static final String PROPERTY_CHANGE_LISTENER = "PropertyChangeListener"; |
32 | |
private static final String VETOABLE_CHANGE_LISTENER = "VetoableChangeListener"; |
33 | |
private static final String ADD_PREFIX = "add"; |
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private static final String READ_PREFIX = "get"; |
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private static final String REMOVE_PREFIX = "remove"; |
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private static final String READ_BOOLEAN_PREFIX = "is"; |
37 | |
private static final String WRITE_PREFIX = "set"; |
38 | |
private static final String HAS_PREFIX = "has"; |
39 | |
|
40 | 213 | private static enum Prefix |
41 | |
{ |
42 | 1 | READ(READ_PREFIX), |
43 | 1 | READ_BOOLEAN(READ_BOOLEAN_PREFIX), |
44 | 1 | WRITE(WRITE_PREFIX), |
45 | 1 | ADD_CHANGE(ADD_PREFIX + PROPERTY_CHANGE_LISTENER), |
46 | 1 | ADD_VETO(ADD_PREFIX + VETOABLE_CHANGE_LISTENER), |
47 | 1 | REMOVE_CHANGE(REMOVE_PREFIX + PROPERTY_CHANGE_LISTENER), |
48 | 1 | REMOVE_VETO(REMOVE_PREFIX + VETOABLE_CHANGE_LISTENER), |
49 | 1 | HAS(HAS_PREFIX); |
50 | |
private int _len; |
51 | |
private String _value; |
52 | |
|
53 | |
private Prefix(String value) |
54 | 8 | { |
55 | 8 | _value = value; |
56 | 8 | _len = value.length(); |
57 | 8 | } |
58 | |
|
59 | |
public static Prefix parse(String str) |
60 | |
{ |
61 | 1961 | Prefix ret = null; |
62 | |
|
63 | 7456 | for (Prefix p : values()) |
64 | |
{ |
65 | 7453 | if (str.startsWith(p.getValue())) |
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{ |
67 | 1958 | ret = p; |
68 | |
|
69 | 1958 | break; |
70 | |
} |
71 | |
} |
72 | |
|
73 | 1961 | return ret; |
74 | |
} |
75 | |
|
76 | |
public String getTail(String input) |
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{ |
78 | 3790 | return Introspector.decapitalize(input.substring(_len)); |
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} |
80 | |
|
81 | |
public String getValue() |
82 | |
{ |
83 | 7453 | return _value; |
84 | |
} |
85 | |
} |
86 | |
|
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private PropertyChangeSupport _pcSupport; |
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private Object _proxy; |
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private VetoableChangeSupport _vcSupport; |
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|
91 | |
@Override public Object invoke(Object proxy, Method method, Object[] args) throws PropertyVetoException |
92 | |
{ |
93 | 1961 | Object ret = null; |
94 | 1961 | Prefix prefix = Prefix.parse(method.getName()); |
95 | |
|
96 | 1961 | if (prefix != null) |
97 | |
{ |
98 | 1958 | String tail = prefix.getTail(method.getName()); |
99 | |
|
100 | 1958 | updateProxy(proxy); |
101 | 1958 | switch (prefix) |
102 | |
{ |
103 | |
|
104 | |
case READ: |
105 | 1092 | ret = getProperty(prefix.getTail(method.getName()), method.getReturnType()); |
106 | 1092 | break; |
107 | |
|
108 | |
case READ_BOOLEAN: |
109 | 1 | ret = getProperty(prefix.getTail(method.getName()), method.getReturnType()); |
110 | 1 | break; |
111 | |
|
112 | |
case WRITE: |
113 | 109 | setProperty(tail, args[0], method.getParameterTypes()[0]); |
114 | 108 | break; |
115 | |
|
116 | |
case HAS: |
117 | 739 | ret = Boolean.valueOf(hasProperty(prefix.getTail(method.getName()))); |
118 | 739 | break; |
119 | |
|
120 | |
case ADD_CHANGE: |
121 | 4 | addPropertyChangeListener((String) args[0], (PropertyChangeListener) args[1]); |
122 | 4 | break; |
123 | |
|
124 | |
case ADD_VETO: |
125 | 3 | addVetoableChangeListener((String) args[0], (VetoableChangeListener) args[1]); |
126 | 3 | break; |
127 | |
|
128 | |
case REMOVE_CHANGE: |
129 | 5 | removePropertyChangeListener((String) args[0], (PropertyChangeListener) args[1]); |
130 | 5 | break; |
131 | |
|
132 | |
case REMOVE_VETO: |
133 | 5 | removeVetoableChangeListener((String) args[0], (VetoableChangeListener) args[1]); |
134 | 5 | break; |
135 | |
|
136 | |
default: |
137 | |
break; |
138 | |
} |
139 | |
} |
140 | |
|
141 | 1960 | return ret; |
142 | |
} |
143 | |
|
144 | |
protected abstract Object getPropertySpi(String property, Class<?> clazz); |
145 | |
|
146 | |
protected abstract void setPropertySpi(String property, Object value, Class<?> clazz); |
147 | |
|
148 | |
protected abstract boolean hasPropertySpi(String property); |
149 | |
|
150 | |
protected synchronized Object getProperty(String property, Class<?> clazz) |
151 | |
{ |
152 | |
Object o; |
153 | |
|
154 | |
try |
155 | |
{ |
156 | 1102 | o = getPropertySpi(property, clazz); |
157 | 1102 | if (o == null) |
158 | |
{ |
159 | 7 | o = zero(clazz); |
160 | |
} |
161 | 1095 | else if (clazz.isArray() && (o instanceof String[]) && !clazz.equals(String[].class)) |
162 | |
{ |
163 | 10 | String[] str = (String[]) o; |
164 | |
|
165 | 10 | o = Array.newInstance(clazz.getComponentType(), str.length); |
166 | 38 | for (int i = 0; i < str.length; i++) |
167 | |
{ |
168 | 28 | Array.set(o, i, parse(str[i], clazz.getComponentType())); |
169 | |
} |
170 | 10 | } |
171 | 1085 | else if ((o instanceof String) && !clazz.equals(String.class)) |
172 | |
{ |
173 | 764 | o = parse((String) o, clazz); |
174 | |
} |
175 | |
} |
176 | 1 | catch (Exception x) |
177 | |
{ |
178 | 1 | o = zero(clazz); |
179 | 1101 | } |
180 | |
|
181 | 1102 | return o; |
182 | |
} |
183 | |
|
184 | |
protected synchronized void setProperty(String property, Object value, Class<?> clazz) throws PropertyVetoException |
185 | |
{ |
186 | 110 | boolean pc = (_pcSupport != null) && _pcSupport.hasListeners(property); |
187 | 110 | boolean vc = (_vcSupport != null) && _vcSupport.hasListeners(property); |
188 | 110 | Object oldVal = null; |
189 | 110 | Object newVal = ((value != null) && clazz.equals(String.class) && !(value instanceof String)) ? value.toString() : value; |
190 | |
|
191 | 110 | if (pc || vc) |
192 | |
{ |
193 | 5 | oldVal = getProperty(property, clazz); |
194 | |
} |
195 | |
|
196 | 110 | if (vc) |
197 | |
{ |
198 | 2 | fireVetoableChange(property, oldVal, value); |
199 | |
} |
200 | |
|
201 | 109 | setPropertySpi(property, newVal, clazz); |
202 | 109 | if (pc) |
203 | |
{ |
204 | 3 | firePropertyChange(property, oldVal, value); |
205 | |
} |
206 | 109 | } |
207 | |
|
208 | |
protected synchronized Object getProxy() |
209 | |
{ |
210 | 2 | return _proxy; |
211 | |
} |
212 | |
|
213 | |
protected synchronized void addPropertyChangeListener(String property, PropertyChangeListener listener) |
214 | |
{ |
215 | 4 | if (_pcSupport == null) |
216 | |
{ |
217 | 2 | _pcSupport = new PropertyChangeSupport(_proxy); |
218 | |
} |
219 | |
|
220 | 4 | _pcSupport.addPropertyChangeListener(property, listener); |
221 | 4 | } |
222 | |
|
223 | |
protected synchronized void addVetoableChangeListener(String property, VetoableChangeListener listener) |
224 | |
{ |
225 | 3 | if (_vcSupport == null) |
226 | |
{ |
227 | 1 | _vcSupport = new VetoableChangeSupport(_proxy); |
228 | |
} |
229 | |
|
230 | 3 | _vcSupport.addVetoableChangeListener(property, listener); |
231 | 3 | } |
232 | |
|
233 | |
protected synchronized void firePropertyChange(String property, Object oldValue, Object newValue) |
234 | |
{ |
235 | 4 | if (_pcSupport != null) |
236 | |
{ |
237 | 3 | _pcSupport.firePropertyChange(property, oldValue, newValue); |
238 | |
} |
239 | 4 | } |
240 | |
|
241 | |
protected synchronized void fireVetoableChange(String property, Object oldValue, Object newValue) throws PropertyVetoException |
242 | |
{ |
243 | 3 | if (_vcSupport != null) |
244 | |
{ |
245 | 2 | _vcSupport.fireVetoableChange(property, oldValue, newValue); |
246 | |
} |
247 | 2 | } |
248 | |
|
249 | |
protected synchronized boolean hasProperty(String property) |
250 | |
{ |
251 | |
boolean ret; |
252 | |
|
253 | |
try |
254 | |
{ |
255 | 742 | ret = hasPropertySpi(property); |
256 | |
} |
257 | 1 | catch (Exception x) |
258 | |
{ |
259 | 1 | ret = false; |
260 | 741 | } |
261 | |
|
262 | 742 | return ret; |
263 | |
} |
264 | |
|
265 | |
protected Object parse(String value, Class<?> clazz) throws IllegalArgumentException |
266 | |
{ |
267 | 792 | return BeanTool.getInstance().parse(value, clazz); |
268 | |
} |
269 | |
|
270 | |
protected synchronized void removePropertyChangeListener(String property, PropertyChangeListener listener) |
271 | |
{ |
272 | 5 | if (_pcSupport != null) |
273 | |
{ |
274 | 4 | _pcSupport.removePropertyChangeListener(property, listener); |
275 | |
} |
276 | 5 | } |
277 | |
|
278 | |
protected synchronized void removeVetoableChangeListener(String property, VetoableChangeListener listener) |
279 | |
{ |
280 | 5 | if (_vcSupport != null) |
281 | |
{ |
282 | 4 | _vcSupport.removeVetoableChangeListener(property, listener); |
283 | |
} |
284 | 5 | } |
285 | |
|
286 | |
protected Object zero(Class<?> clazz) |
287 | |
{ |
288 | 8 | return BeanTool.getInstance().zero(clazz); |
289 | |
} |
290 | |
|
291 | |
private synchronized void updateProxy(Object value) |
292 | |
{ |
293 | 1958 | if (_proxy == null) |
294 | |
{ |
295 | 205 | _proxy = value; |
296 | |
} |
297 | 1958 | } |
298 | |
} |