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| package org.apache.tapestry.enhance; |
16 |
| |
17 |
| import java.beans.BeanInfo; |
18 |
| import java.beans.IntrospectionException; |
19 |
| import java.beans.Introspector; |
20 |
| import java.beans.PropertyDescriptor; |
21 |
| import java.lang.reflect.Constructor; |
22 |
| import java.lang.reflect.Method; |
23 |
| import java.lang.reflect.Modifier; |
24 |
| import java.util.ArrayList; |
25 |
| import java.util.HashMap; |
26 |
| import java.util.HashSet; |
27 |
| import java.util.IdentityHashMap; |
28 |
| import java.util.Iterator; |
29 |
| import java.util.List; |
30 |
| import java.util.Map; |
31 |
| import java.util.Set; |
32 |
| |
33 |
| import org.apache.hivemind.ApplicationRuntimeException; |
34 |
| import org.apache.hivemind.ClassResolver; |
35 |
| import org.apache.hivemind.HiveMind; |
36 |
| import org.apache.hivemind.service.BodyBuilder; |
37 |
| import org.apache.hivemind.service.ClassFab; |
38 |
| import org.apache.hivemind.service.ClassFactory; |
39 |
| import org.apache.hivemind.service.MethodSignature; |
40 |
| import org.apache.hivemind.util.Defense; |
41 |
| import org.apache.hivemind.util.ToStringBuilder; |
42 |
| import org.apache.tapestry.services.ComponentConstructor; |
43 |
| import org.apache.tapestry.spec.IComponentSpecification; |
44 |
| import org.apache.tapestry.util.IdAllocator; |
45 |
| |
46 |
| |
47 |
| |
48 |
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49 |
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53 |
| |
54 |
| public class EnhancementOperationImpl implements EnhancementOperation |
55 |
| { |
56 |
| private ClassResolver _resolver; |
57 |
| |
58 |
| private IComponentSpecification _specification; |
59 |
| |
60 |
| private Class _baseClass; |
61 |
| |
62 |
| private ClassFab _classFab; |
63 |
| |
64 |
| private final Set _claimedProperties = new HashSet(); |
65 |
| |
66 |
| private final JavaClassMapping _javaClassMapping = new JavaClassMapping(); |
67 |
| |
68 |
| private final List _constructorTypes = new ArrayList(); |
69 |
| |
70 |
| private final List _constructorArguments = new ArrayList(); |
71 |
| |
72 |
| private final Map _finalFields = new IdentityHashMap(); |
73 |
| |
74 |
| |
75 |
| |
76 |
| |
77 |
| |
78 |
| private Set _addedInterfaces = new HashSet(); |
79 |
| |
80 |
| |
81 |
| |
82 |
| |
83 |
| |
84 |
| private Map _incompleteMethods = new HashMap(); |
85 |
| |
86 |
| |
87 |
| |
88 |
| |
89 |
| |
90 |
| private Map _properties = new HashMap(); |
91 |
| |
92 |
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93 |
| |
94 |
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95 |
| |
96 |
| private BodyBuilder _constructorBuilder; |
97 |
| |
98 |
| |
99 |
| |
100 |
| |
101 |
| |
102 |
| private final IdAllocator _idAllocator = new IdAllocator(); |
103 |
| |
104 |
587
| public EnhancementOperationImpl(ClassResolver classResolver,
|
105 |
| IComponentSpecification specification, Class baseClass, ClassFactory classFactory) |
106 |
| { |
107 |
587
| Defense.notNull(classResolver, "classResolver");
|
108 |
587
| Defense.notNull(specification, "specification");
|
109 |
587
| Defense.notNull(baseClass, "baseClass");
|
110 |
587
| Defense.notNull(classFactory, "classFactory");
|
111 |
| |
112 |
587
| _resolver = classResolver;
|
113 |
587
| _specification = specification;
|
114 |
587
| _baseClass = baseClass;
|
115 |
| |
116 |
587
| introspectBaseClass();
|
117 |
| |
118 |
587
| String name = newClassName();
|
119 |
| |
120 |
587
| _classFab = classFactory.newClass(name, _baseClass);
|
121 |
| } |
122 |
| |
123 |
0
| public String toString()
|
124 |
| { |
125 |
0
| ToStringBuilder builder = new ToStringBuilder(this);
|
126 |
| |
127 |
0
| builder.append("baseClass", _baseClass.getName());
|
128 |
0
| builder.append("claimedProperties", _claimedProperties);
|
129 |
0
| builder.append("classFab", _classFab);
|
130 |
| |
131 |
0
| return builder.toString();
|
132 |
| } |
133 |
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135 |
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137 |
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138 |
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139 |
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140 |
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141 |
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142 |
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143 |
587
| private void introspectBaseClass()
|
144 |
| { |
145 |
587
| try
|
146 |
| { |
147 |
587
| synchronized (HiveMind.INTROSPECTOR_MUTEX)
|
148 |
| { |
149 |
587
| addPropertiesDeclaredInBaseClass();
|
150 |
| } |
151 |
| } |
152 |
| catch (IntrospectionException ex) |
153 |
| { |
154 |
0
| throw new ApplicationRuntimeException(EnhanceMessages.unabelToIntrospectClass(
|
155 |
| _baseClass, |
156 |
| ex), ex); |
157 |
| } |
158 |
| |
159 |
| } |
160 |
| |
161 |
587
| private void addPropertiesDeclaredInBaseClass() throws IntrospectionException
|
162 |
| { |
163 |
587
| Class introspectClass = _baseClass;
|
164 |
| |
165 |
587
| addPropertiesDeclaredInClass(introspectClass);
|
166 |
| |
167 |
587
| List interfaceQueue = new ArrayList();
|
168 |
| |
169 |
587
| while (introspectClass != null)
|
170 |
| { |
171 |
2900
| addInterfacesToQueue(introspectClass, interfaceQueue);
|
172 |
| |
173 |
2900
| introspectClass = introspectClass.getSuperclass();
|
174 |
| } |
175 |
| |
176 |
587
| while (!interfaceQueue.isEmpty())
|
177 |
| { |
178 |
6305
| Class interfaceClass = (Class) interfaceQueue.remove(0);
|
179 |
| |
180 |
6305
| addPropertiesDeclaredInClass(interfaceClass);
|
181 |
| |
182 |
6305
| addInterfacesToQueue(interfaceClass, interfaceQueue);
|
183 |
| } |
184 |
| } |
185 |
| |
186 |
9205
| private void addInterfacesToQueue(Class introspectClass, List interfaceQueue)
|
187 |
| { |
188 |
9205
| Class[] interfaces = introspectClass.getInterfaces();
|
189 |
| |
190 |
9205
| for (int i = 0; i < interfaces.length; i++)
|
191 |
6305
| interfaceQueue.add(interfaces[i]);
|
192 |
| } |
193 |
| |
194 |
6892
| private void addPropertiesDeclaredInClass(Class introspectClass) throws IntrospectionException
|
195 |
| { |
196 |
6892
| BeanInfo bi = Introspector.getBeanInfo(introspectClass);
|
197 |
| |
198 |
6892
| PropertyDescriptor[] pds = bi.getPropertyDescriptors();
|
199 |
| |
200 |
6892
| for (int i = 0; i < pds.length; i++)
|
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| { |
202 |
36937
| PropertyDescriptor pd = pds[i];
|
203 |
| |
204 |
36937
| String name = pd.getName();
|
205 |
| |
206 |
36937
| if (!_properties.containsKey(name))
|
207 |
14792
| _properties.put(name, pd);
|
208 |
| } |
209 |
| } |
210 |
| |
211 |
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212 |
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213 |
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214 |
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215 |
| |
216 |
1
| EnhancementOperationImpl()
|
217 |
| { |
218 |
| } |
219 |
| |
220 |
3791
| public void claimProperty(String propertyName)
|
221 |
| { |
222 |
3791
| Defense.notNull(propertyName, "propertyName");
|
223 |
| |
224 |
3791
| if (_claimedProperties.contains(propertyName))
|
225 |
1
| throw new ApplicationRuntimeException(EnhanceMessages.claimedProperty(propertyName));
|
226 |
| |
227 |
3790
| _claimedProperties.add(propertyName);
|
228 |
| } |
229 |
| |
230 |
6343
| public void addField(String name, Class type)
|
231 |
| { |
232 |
6343
| _classFab.addField(name, type);
|
233 |
| } |
234 |
| |
235 |
1864
| public String addInjectedField(String fieldName, Class fieldType, Object value)
|
236 |
| { |
237 |
1864
| Defense.notNull(fieldName, "fieldName");
|
238 |
1864
| Defense.notNull(fieldType, "fieldType");
|
239 |
1864
| Defense.notNull(value, "value");
|
240 |
| |
241 |
1864
| String existing = (String) _finalFields.get(value);
|
242 |
| |
243 |
| |
244 |
| |
245 |
1864
| if (existing != null)
|
246 |
0
| return existing;
|
247 |
| |
248 |
| |
249 |
| |
250 |
| |
251 |
| |
252 |
| |
253 |
1864
| String uniqueName = _idAllocator.allocateId(fieldName);
|
254 |
| |
255 |
| |
256 |
| |
257 |
| |
258 |
1864
| _classFab.addField(uniqueName, fieldType);
|
259 |
| |
260 |
1864
| int parameterIndex = addConstructorParameter(fieldType, value);
|
261 |
| |
262 |
1864
| constructorBuilder().addln("{0} = ${1};", uniqueName, Integer.toString(parameterIndex));
|
263 |
| |
264 |
| |
265 |
| |
266 |
1864
| _finalFields.put(value, uniqueName);
|
267 |
| |
268 |
1864
| return uniqueName;
|
269 |
| } |
270 |
| |
271 |
92
| public Class convertTypeName(String type)
|
272 |
| { |
273 |
92
| Defense.notNull(type, "type");
|
274 |
| |
275 |
92
| Class result = _javaClassMapping.getType(type);
|
276 |
| |
277 |
92
| if (result == null)
|
278 |
| { |
279 |
22
| result = _resolver.findClass(type);
|
280 |
| |
281 |
21
| _javaClassMapping.recordType(type, result);
|
282 |
| } |
283 |
| |
284 |
91
| return result;
|
285 |
| } |
286 |
| |
287 |
2836
| public Class getPropertyType(String name)
|
288 |
| { |
289 |
2836
| Defense.notNull(name, "name");
|
290 |
| |
291 |
2836
| PropertyDescriptor pd = getPropertyDescriptor(name);
|
292 |
| |
293 |
2836
| return pd == null ? null : pd.getPropertyType();
|
294 |
| } |
295 |
| |
296 |
89
| public void validateProperty(String name, Class expectedType)
|
297 |
| { |
298 |
89
| Defense.notNull(name, "name");
|
299 |
89
| Defense.notNull(expectedType, "expectedType");
|
300 |
| |
301 |
89
| PropertyDescriptor pd = getPropertyDescriptor(name);
|
302 |
| |
303 |
89
| if (pd == null)
|
304 |
25
| return;
|
305 |
| |
306 |
64
| Class propertyType = pd.getPropertyType();
|
307 |
| |
308 |
64
| if (propertyType.equals(expectedType))
|
309 |
63
| return;
|
310 |
| |
311 |
1
| throw new ApplicationRuntimeException(EnhanceMessages.propertyTypeMismatch(
|
312 |
| _baseClass, |
313 |
| name, |
314 |
| propertyType, |
315 |
| expectedType)); |
316 |
| } |
317 |
| |
318 |
5909
| private PropertyDescriptor getPropertyDescriptor(String name)
|
319 |
| { |
320 |
5909
| return (PropertyDescriptor) _properties.get(name);
|
321 |
| } |
322 |
| |
323 |
2984
| public String getAccessorMethodName(String propertyName)
|
324 |
| { |
325 |
2984
| Defense.notNull(propertyName, "propertyName");
|
326 |
| |
327 |
2984
| PropertyDescriptor pd = getPropertyDescriptor(propertyName);
|
328 |
| |
329 |
2984
| if (pd != null && pd.getReadMethod() != null)
|
330 |
2797
| return pd.getReadMethod().getName();
|
331 |
| |
332 |
187
| return EnhanceUtils.createAccessorMethodName(propertyName);
|
333 |
| } |
334 |
| |
335 |
6330
| public void addMethod(int modifier, MethodSignature sig, String methodBody)
|
336 |
| { |
337 |
6330
| _classFab.addMethod(modifier, sig, methodBody);
|
338 |
| } |
339 |
| |
340 |
1
| public Class getBaseClass()
|
341 |
| { |
342 |
1
| return _baseClass;
|
343 |
| } |
344 |
| |
345 |
802
| public String getClassReference(Class clazz)
|
346 |
| { |
347 |
802
| Defense.notNull(clazz, "clazz");
|
348 |
| |
349 |
802
| String result = (String) _finalFields.get(clazz);
|
350 |
| |
351 |
802
| if (result == null)
|
352 |
619
| result = addClassReference(clazz);
|
353 |
| |
354 |
802
| return result;
|
355 |
| } |
356 |
| |
357 |
619
| private String addClassReference(Class clazz)
|
358 |
| { |
359 |
619
| StringBuffer buffer = new StringBuffer("_class$");
|
360 |
| |
361 |
619
| Class c = clazz;
|
362 |
| |
363 |
619
| while (c.isArray())
|
364 |
| { |
365 |
15
| buffer.append("array$");
|
366 |
15
| c = c.getComponentType();
|
367 |
| } |
368 |
| |
369 |
619
| buffer.append(c.getName().replace('.', '$'));
|
370 |
| |
371 |
619
| String fieldName = buffer.toString();
|
372 |
| |
373 |
619
| return addInjectedField(fieldName, Class.class, clazz);
|
374 |
| } |
375 |
| |
376 |
| |
377 |
| |
378 |
| |
379 |
| |
380 |
| |
381 |
1864
| private int addConstructorParameter(Class type, Object value)
|
382 |
| { |
383 |
1864
| _constructorTypes.add(type);
|
384 |
1864
| _constructorArguments.add(value);
|
385 |
| |
386 |
1864
| return _constructorArguments.size();
|
387 |
| } |
388 |
| |
389 |
1864
| private BodyBuilder constructorBuilder()
|
390 |
| { |
391 |
1864
| if (_constructorBuilder == null)
|
392 |
| { |
393 |
437
| _constructorBuilder = new BodyBuilder();
|
394 |
437
| _constructorBuilder.begin();
|
395 |
| } |
396 |
| |
397 |
1864
| return _constructorBuilder;
|
398 |
| } |
399 |
| |
400 |
| |
401 |
| |
402 |
| |
403 |
| |
404 |
| |
405 |
570
| public ComponentConstructor getConstructor()
|
406 |
| { |
407 |
570
| try
|
408 |
| { |
409 |
570
| finalizeEnhancedClass();
|
410 |
| |
411 |
570
| Constructor c = findConstructor();
|
412 |
| |
413 |
569
| Object[] params = _constructorArguments.toArray();
|
414 |
| |
415 |
569
| return new ComponentConstructorImpl(c, params, _classFab.toString(), _specification
|
416 |
| .getLocation()); |
417 |
| } |
418 |
| catch (Throwable t) |
419 |
| { |
420 |
1
| throw new ApplicationRuntimeException(EnhanceMessages.classEnhancementFailure(
|
421 |
| _baseClass, |
422 |
| t), _classFab, null, t); |
423 |
| } |
424 |
| } |
425 |
| |
426 |
571
| void finalizeEnhancedClass()
|
427 |
| { |
428 |
571
| finalizeIncompleteMethods();
|
429 |
| |
430 |
571
| if (_constructorBuilder != null)
|
431 |
| { |
432 |
436
| _constructorBuilder.end();
|
433 |
| |
434 |
436
| Class[] types = (Class[]) _constructorTypes
|
435 |
| .toArray(new Class[_constructorTypes.size()]); |
436 |
| |
437 |
436
| _classFab.addConstructor(types, null, _constructorBuilder.toString());
|
438 |
| } |
439 |
| } |
440 |
| |
441 |
571
| private void finalizeIncompleteMethods()
|
442 |
| { |
443 |
571
| Iterator i = _incompleteMethods.entrySet().iterator();
|
444 |
571
| while (i.hasNext())
|
445 |
| { |
446 |
696
| Map.Entry e = (Map.Entry) i.next();
|
447 |
696
| MethodSignature sig = (MethodSignature) e.getKey();
|
448 |
696
| BodyBuilder builder = (BodyBuilder) e.getValue();
|
449 |
| |
450 |
| |
451 |
| |
452 |
| |
453 |
696
| builder.end();
|
454 |
| |
455 |
696
| _classFab.addMethod(Modifier.PUBLIC, sig, builder.toString());
|
456 |
| } |
457 |
| } |
458 |
| |
459 |
570
| private Constructor findConstructor()
|
460 |
| { |
461 |
570
| Class componentClass = _classFab.createClass();
|
462 |
| |
463 |
| |
464 |
| |
465 |
569
| return componentClass.getConstructors()[0];
|
466 |
| } |
467 |
| |
468 |
| static int _uid = 0; |
469 |
| |
470 |
587
| private String newClassName()
|
471 |
| { |
472 |
587
| String baseName = _baseClass.getName();
|
473 |
587
| int dotx = baseName.lastIndexOf('.');
|
474 |
| |
475 |
587
| return "$" + baseName.substring(dotx + 1) + "_" + _uid++;
|
476 |
| } |
477 |
| |
478 |
3558
| public void extendMethodImplementation(Class interfaceClass, MethodSignature methodSignature,
|
479 |
| String code) |
480 |
| { |
481 |
3558
| addInterfaceIfNeeded(interfaceClass);
|
482 |
| |
483 |
3558
| BodyBuilder builder = (BodyBuilder) _incompleteMethods.get(methodSignature);
|
484 |
| |
485 |
3558
| if (builder == null)
|
486 |
| { |
487 |
698
| builder = createIncompleteMethod(methodSignature);
|
488 |
| |
489 |
698
| _incompleteMethods.put(methodSignature, builder);
|
490 |
| } |
491 |
| |
492 |
3558
| builder.addln(code);
|
493 |
| } |
494 |
| |
495 |
3558
| private void addInterfaceIfNeeded(Class interfaceClass)
|
496 |
| { |
497 |
3558
| if (implementsInterface(interfaceClass))
|
498 |
3358
| return;
|
499 |
| |
500 |
200
| _classFab.addInterface(interfaceClass);
|
501 |
200
| _addedInterfaces.add(interfaceClass);
|
502 |
| } |
503 |
| |
504 |
5652
| public boolean implementsInterface(Class interfaceClass)
|
505 |
| { |
506 |
5652
| if (interfaceClass.isAssignableFrom(_baseClass))
|
507 |
2386
| return true;
|
508 |
| |
509 |
3266
| Iterator i = _addedInterfaces.iterator();
|
510 |
3266
| while (i.hasNext())
|
511 |
| { |
512 |
1290
| Class addedInterface = (Class) i.next();
|
513 |
| |
514 |
1290
| if (interfaceClass.isAssignableFrom(addedInterface))
|
515 |
1049
| return true;
|
516 |
| } |
517 |
| |
518 |
2217
| return false;
|
519 |
| } |
520 |
| |
521 |
698
| private BodyBuilder createIncompleteMethod(MethodSignature sig)
|
522 |
| { |
523 |
698
| BodyBuilder result = new BodyBuilder();
|
524 |
| |
525 |
| |
526 |
| |
527 |
698
| result.begin();
|
528 |
| |
529 |
698
| if (existingImplementation(sig))
|
530 |
484
| result.addln("super.{0}($$);", sig.getName());
|
531 |
| |
532 |
698
| return result;
|
533 |
| } |
534 |
| |
535 |
| |
536 |
| |
537 |
| |
538 |
| |
539 |
| |
540 |
698
| private boolean existingImplementation(MethodSignature sig)
|
541 |
| { |
542 |
698
| Method m = findMethod(sig);
|
543 |
| |
544 |
698
| return m != null && !Modifier.isAbstract(m.getModifiers());
|
545 |
| } |
546 |
| |
547 |
| |
548 |
| |
549 |
| |
550 |
698
| private Method findMethod(MethodSignature sig)
|
551 |
| { |
552 |
| |
553 |
| |
554 |
698
| try
|
555 |
| { |
556 |
698
| return _baseClass.getMethod(sig.getName(), sig.getParameterTypes());
|
557 |
| |
558 |
| } |
559 |
| catch (NoSuchMethodException ex) |
560 |
| { |
561 |
| |
562 |
| } |
563 |
| |
564 |
482
| Class c = _baseClass;
|
565 |
| |
566 |
482
| while (c != Object.class)
|
567 |
| { |
568 |
1407
| try
|
569 |
| { |
570 |
1407
| return c.getDeclaredMethod(sig.getName(), sig.getParameterTypes());
|
571 |
| } |
572 |
| catch (NoSuchMethodException ex) |
573 |
| { |
574 |
| |
575 |
| } |
576 |
| |
577 |
1125
| c = c.getSuperclass();
|
578 |
| } |
579 |
| |
580 |
200
| return null;
|
581 |
| } |
582 |
| |
583 |
552
| public List findUnclaimedAbstractProperties()
|
584 |
| { |
585 |
552
| List result = new ArrayList();
|
586 |
| |
587 |
552
| Iterator i = _properties.values().iterator();
|
588 |
| |
589 |
552
| while (i.hasNext())
|
590 |
| { |
591 |
14002
| PropertyDescriptor pd = (PropertyDescriptor) i.next();
|
592 |
| |
593 |
14002
| String name = pd.getName();
|
594 |
| |
595 |
14002
| if (_claimedProperties.contains(name))
|
596 |
2521
| continue;
|
597 |
| |
598 |
11481
| if (isAbstractProperty(pd))
|
599 |
1082
| result.add(name);
|
600 |
| } |
601 |
| |
602 |
552
| return result;
|
603 |
| } |
604 |
| |
605 |
| |
606 |
| |
607 |
| |
608 |
| |
609 |
| |
610 |
11481
| private boolean isAbstractProperty(PropertyDescriptor pd)
|
611 |
| { |
612 |
11481
| return isExistingAbstractMethod(pd.getReadMethod())
|
613 |
| || isExistingAbstractMethod(pd.getWriteMethod()); |
614 |
| } |
615 |
| |
616 |
21930
| private boolean isExistingAbstractMethod(Method m)
|
617 |
| { |
618 |
21930
| return m != null && Modifier.isAbstract(m.getModifiers());
|
619 |
| } |
620 |
| } |