1 |
|
|
2 |
|
|
3 |
|
|
4 |
|
|
5 |
|
|
6 |
|
|
7 |
|
|
8 |
|
|
9 |
|
|
10 |
|
|
11 |
|
|
12 |
|
|
13 |
|
|
14 |
|
|
15 |
|
package org.apache.tapestry.bean; |
16 |
|
|
17 |
|
import java.util.Collection; |
18 |
|
import java.util.Collections; |
19 |
|
import java.util.HashMap; |
20 |
|
import java.util.HashSet; |
21 |
|
import java.util.Iterator; |
22 |
|
import java.util.List; |
23 |
|
import java.util.Map; |
24 |
|
import java.util.Set; |
25 |
|
|
26 |
|
import org.apache.commons.logging.Log; |
27 |
|
import org.apache.commons.logging.LogFactory; |
28 |
|
import org.apache.hivemind.ApplicationRuntimeException; |
29 |
|
import org.apache.hivemind.ClassResolver; |
30 |
|
import org.apache.tapestry.IBeanProvider; |
31 |
|
import org.apache.tapestry.IComponent; |
32 |
|
import org.apache.tapestry.INamespace; |
33 |
|
import org.apache.tapestry.event.PageDetachListener; |
34 |
|
import org.apache.tapestry.event.PageEndRenderListener; |
35 |
|
import org.apache.tapestry.event.PageEvent; |
36 |
|
import org.apache.tapestry.services.ClassFinder; |
37 |
|
import org.apache.tapestry.services.Infrastructure; |
38 |
|
import org.apache.tapestry.spec.BeanLifecycle; |
39 |
|
import org.apache.tapestry.spec.IBeanSpecification; |
40 |
|
import org.apache.tapestry.spec.IComponentSpecification; |
41 |
|
|
42 |
|
|
43 |
|
|
44 |
|
|
45 |
|
|
46 |
|
|
47 |
|
|
48 |
|
|
49 |
|
public class BeanProvider implements IBeanProvider, PageDetachListener, PageEndRenderListener |
50 |
|
{ |
51 |
2 |
private static final Log LOG = LogFactory.getLog(BeanProvider.class); |
52 |
|
|
53 |
|
|
54 |
|
|
55 |
|
|
56 |
|
|
57 |
|
|
58 |
3 |
private boolean _registeredForDetach = false; |
59 |
|
|
60 |
|
|
61 |
|
|
62 |
|
|
63 |
|
|
64 |
3 |
private boolean _registeredForRender = false; |
65 |
|
|
66 |
|
|
67 |
|
|
68 |
|
|
69 |
|
|
70 |
|
private final IComponent _component; |
71 |
|
|
72 |
|
|
73 |
|
|
74 |
|
|
75 |
|
|
76 |
|
private final ClassResolver _resolver; |
77 |
|
|
78 |
|
|
79 |
|
|
80 |
|
|
81 |
|
|
82 |
|
private final ClassFinder _classFinder; |
83 |
|
|
84 |
|
private final String _packageList; |
85 |
|
|
86 |
|
|
87 |
|
|
88 |
|
|
89 |
|
|
90 |
|
private Map _beans; |
91 |
|
|
92 |
|
|
93 |
|
|
94 |
|
|
95 |
|
|
96 |
|
|
97 |
|
|
98 |
|
private Set _beanNames; |
99 |
|
|
100 |
|
public BeanProvider(IComponent component) |
101 |
3 |
{ |
102 |
3 |
_component = component; |
103 |
|
|
104 |
3 |
Infrastructure infrastructure = component.getPage().getRequestCycle().getInfrastructure(); |
105 |
|
|
106 |
3 |
_resolver = infrastructure.getClassResolver(); |
107 |
|
|
108 |
3 |
INamespace namespace = component.getNamespace(); |
109 |
3 |
_packageList = namespace.getPropertyValue("org.apache.tapestry.bean-class-packages"); |
110 |
|
|
111 |
3 |
_classFinder = infrastructure.getClassFinder(); |
112 |
3 |
} |
113 |
|
|
114 |
|
|
115 |
|
|
116 |
|
public Collection getBeanNames() |
117 |
|
{ |
118 |
0 |
if (_beanNames == null) |
119 |
|
{ |
120 |
0 |
Collection c = _component.getSpecification().getBeanNames(); |
121 |
|
|
122 |
0 |
if (c == null || c.isEmpty()) |
123 |
0 |
_beanNames = Collections.EMPTY_SET; |
124 |
|
else |
125 |
0 |
_beanNames = Collections.unmodifiableSet(new HashSet(c)); |
126 |
|
} |
127 |
|
|
128 |
0 |
return _beanNames; |
129 |
|
} |
130 |
|
|
131 |
|
|
132 |
|
|
133 |
|
|
134 |
|
|
135 |
|
public IComponent getComponent() |
136 |
|
{ |
137 |
0 |
return _component; |
138 |
|
} |
139 |
|
|
140 |
|
public Object getBean(String name) |
141 |
|
{ |
142 |
0 |
if (LOG.isDebugEnabled()) |
143 |
0 |
LOG.debug("getBean(" + name + ")"); |
144 |
|
|
145 |
0 |
Object bean = null; |
146 |
|
|
147 |
0 |
if (_beans != null) |
148 |
0 |
bean = _beans.get(name); |
149 |
|
|
150 |
0 |
if (bean != null) |
151 |
0 |
return bean; |
152 |
|
|
153 |
0 |
IBeanSpecification spec = _component.getSpecification().getBeanSpecification(name); |
154 |
|
|
155 |
0 |
if (spec == null) |
156 |
0 |
throw new ApplicationRuntimeException(BeanMessages.beanNotDefined(_component, name)); |
157 |
|
|
158 |
0 |
bean = instantiateBean(name, spec); |
159 |
|
|
160 |
0 |
BeanLifecycle lifecycle = spec.getLifecycle(); |
161 |
|
|
162 |
0 |
if (lifecycle == BeanLifecycle.NONE) |
163 |
0 |
return bean; |
164 |
|
|
165 |
0 |
if (_beans == null) |
166 |
0 |
_beans = new HashMap(); |
167 |
|
|
168 |
0 |
_beans.put(name, bean); |
169 |
|
|
170 |
|
|
171 |
|
|
172 |
|
|
173 |
|
|
174 |
0 |
if (lifecycle == BeanLifecycle.REQUEST && !_registeredForDetach) |
175 |
|
{ |
176 |
0 |
_component.getPage().addPageDetachListener(this); |
177 |
0 |
_registeredForDetach = true; |
178 |
|
} |
179 |
|
|
180 |
0 |
if (lifecycle == BeanLifecycle.RENDER && !_registeredForRender) |
181 |
|
{ |
182 |
0 |
_component.getPage().addPageEndRenderListener(this); |
183 |
0 |
_registeredForRender = true; |
184 |
|
} |
185 |
|
|
186 |
|
|
187 |
|
|
188 |
|
|
189 |
0 |
return bean; |
190 |
|
} |
191 |
|
|
192 |
|
Object instantiateBean(String beanName, IBeanSpecification spec) |
193 |
|
{ |
194 |
3 |
String className = spec.getClassName(); |
195 |
3 |
Object bean = null; |
196 |
|
|
197 |
3 |
if (LOG.isDebugEnabled()) |
198 |
0 |
LOG.debug("Instantiating instance of " + className); |
199 |
|
|
200 |
3 |
Class beanClass = _classFinder.findClass(_packageList, className); |
201 |
|
|
202 |
3 |
if (beanClass == null) |
203 |
1 |
throw new ApplicationRuntimeException(BeanMessages.missingBeanClass( |
204 |
|
_component, |
205 |
|
beanName, |
206 |
|
className, |
207 |
|
_packageList), _component, spec.getLocation(), null); |
208 |
|
|
209 |
|
|
210 |
|
|
211 |
|
try |
212 |
|
{ |
213 |
2 |
bean = beanClass.newInstance(); |
214 |
|
} |
215 |
1 |
catch (Exception ex) |
216 |
|
{ |
217 |
1 |
throw new ApplicationRuntimeException(BeanMessages.instantiationError( |
218 |
|
beanName, |
219 |
|
_component, |
220 |
|
beanClass, |
221 |
|
ex), _component, spec.getLocation(), ex); |
222 |
1 |
} |
223 |
|
|
224 |
|
|
225 |
|
|
226 |
1 |
List initializers = spec.getInitializers(); |
227 |
|
|
228 |
1 |
if (initializers == null) |
229 |
0 |
return bean; |
230 |
|
|
231 |
1 |
Iterator i = initializers.iterator(); |
232 |
1 |
while (i.hasNext()) |
233 |
|
{ |
234 |
1 |
IBeanInitializer iz = (IBeanInitializer) i.next(); |
235 |
|
|
236 |
1 |
if (LOG.isDebugEnabled()) |
237 |
0 |
LOG.debug("Initializing property " + iz.getPropertyName()); |
238 |
|
|
239 |
|
try |
240 |
|
{ |
241 |
1 |
iz.setBeanProperty(this, bean); |
242 |
|
} |
243 |
1 |
catch (Exception ex) |
244 |
|
{ |
245 |
1 |
throw new ApplicationRuntimeException(BeanMessages.initializationError( |
246 |
|
_component, |
247 |
|
beanName, |
248 |
|
iz.getPropertyName(), |
249 |
|
ex), bean, iz.getLocation(), ex); |
250 |
|
|
251 |
0 |
} |
252 |
0 |
} |
253 |
|
|
254 |
0 |
return bean; |
255 |
|
} |
256 |
|
|
257 |
|
|
258 |
|
|
259 |
|
|
260 |
|
|
261 |
|
|
262 |
|
public void pageDetached(PageEvent event) |
263 |
|
{ |
264 |
0 |
removeBeans(BeanLifecycle.REQUEST); |
265 |
0 |
} |
266 |
|
|
267 |
|
|
268 |
|
|
269 |
|
|
270 |
|
|
271 |
|
|
272 |
|
|
273 |
|
private void removeBeans(BeanLifecycle lifecycle) |
274 |
|
{ |
275 |
0 |
if (_beans == null) |
276 |
0 |
return; |
277 |
|
|
278 |
0 |
IComponentSpecification spec = null; |
279 |
|
|
280 |
0 |
Iterator i = _beans.entrySet().iterator(); |
281 |
0 |
while (i.hasNext()) |
282 |
|
{ |
283 |
0 |
Map.Entry e = (Map.Entry) i.next(); |
284 |
0 |
String name = (String) e.getKey(); |
285 |
|
|
286 |
0 |
if (spec == null) |
287 |
0 |
spec = _component.getSpecification(); |
288 |
|
|
289 |
0 |
IBeanSpecification s = spec.getBeanSpecification(name); |
290 |
|
|
291 |
0 |
if (s.getLifecycle() == lifecycle) |
292 |
|
{ |
293 |
0 |
Object bean = e.getValue(); |
294 |
|
|
295 |
0 |
if (LOG.isDebugEnabled()) |
296 |
0 |
LOG.debug("Removing " + lifecycle.getName() + " bean " + name + ": " + bean); |
297 |
|
|
298 |
0 |
i.remove(); |
299 |
|
} |
300 |
0 |
} |
301 |
0 |
} |
302 |
|
|
303 |
|
|
304 |
|
|
305 |
|
public ClassResolver getClassResolver() |
306 |
|
{ |
307 |
0 |
return _resolver; |
308 |
|
} |
309 |
|
|
310 |
|
|
311 |
|
|
312 |
|
public void pageEndRender(PageEvent event) |
313 |
|
{ |
314 |
0 |
removeBeans(BeanLifecycle.RENDER); |
315 |
0 |
} |
316 |
|
|
317 |
|
|
318 |
|
|
319 |
|
public boolean canProvideBean(String name) |
320 |
|
{ |
321 |
0 |
return getBeanNames().contains(name); |
322 |
|
} |
323 |
|
|
324 |
|
} |