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14 package org.eclipse.jetty.annotations;
15
16 import java.lang.reflect.Method;
17 import java.lang.reflect.Modifier;
18
19 import javax.annotation.PostConstruct;
20
21 import org.eclipse.jetty.annotations.AnnotationIntrospector.AbstractIntrospectableAnnotationHandler;
22 import org.eclipse.jetty.plus.annotation.LifeCycleCallbackCollection;
23 import org.eclipse.jetty.plus.annotation.PostConstructCallback;
24 import org.eclipse.jetty.webapp.MetaData;
25 import org.eclipse.jetty.webapp.Origin;
26 import org.eclipse.jetty.webapp.WebAppContext;
27
28 public class PostConstructAnnotationHandler extends AbstractIntrospectableAnnotationHandler
29 {
30 protected WebAppContext _context;
31
32 public PostConstructAnnotationHandler (WebAppContext wac)
33 {
34 super(true);
35 _context = wac;
36 }
37
38
39 public void doHandle(Class clazz)
40 {
41
42 if (Util.isServletType(clazz))
43 {
44 Method[] methods = clazz.getDeclaredMethods();
45 for (int i=0; i<methods.length; i++)
46 {
47 Method m = (Method)methods[i];
48 if (m.isAnnotationPresent(PostConstruct.class))
49 {
50 if (m.getParameterTypes().length != 0)
51 throw new IllegalStateException(m+" has parameters");
52 if (m.getReturnType() != Void.TYPE)
53 throw new IllegalStateException(m+" is not void");
54 if (m.getExceptionTypes().length != 0)
55 throw new IllegalStateException(m+" throws checked exceptions");
56 if (Modifier.isStatic(m.getModifiers()))
57 throw new IllegalStateException(m+" is static");
58
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61 MetaData metaData = _context.getMetaData();
62 Origin origin = metaData.getOrigin("post-construct");
63 if (origin != null &&
64 (origin == Origin.WebXml ||
65 origin == Origin.WebDefaults ||
66 origin == Origin.WebOverride))
67 return;
68
69 PostConstructCallback callback = new PostConstructCallback();
70 callback.setTarget(clazz.getName(), m.getName());
71 LifeCycleCallbackCollection lifecycles = (LifeCycleCallbackCollection)_context.getAttribute(LifeCycleCallbackCollection.LIFECYCLE_CALLBACK_COLLECTION);
72 if (lifecycles == null)
73 {
74 lifecycles = new LifeCycleCallbackCollection();
75 _context.setAttribute(LifeCycleCallbackCollection.LIFECYCLE_CALLBACK_COLLECTION,lifecycles);
76 }
77 lifecycles.add(callback);
78 }
79 }
80 }
81 }
82 }