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1
8 package org.picocontainer.defaults;
9
10 import org.picocontainer.ComponentAdapter;
11 import org.picocontainer.Parameter;
12 import org.picocontainer.PicoContainer;
13 import org.picocontainer.PicoIntrospectionException;
14
15 import java.lang.reflect.InvocationTargetException  ;
16 import java.lang.reflect.Method ;
17 import java.util.ArrayList ;
18 import java.util.Collections ;
19 import java.util.Iterator ;
20 import java.util.List ;
21 import java.io.Serializable ;
22
23
24
30 public class LifecycleVisitor extends AbstractPicoVisitor implements Serializable {
31
32 private transient Method method;
33 private Class type;
34 private boolean visitInInstantiationOrder;
35 private List componentInstances;
36 private ComponentMonitor componentMonitor;
37
38 public LifecycleVisitor(Method method, Class ofType, boolean visitInInstantiationOrder, ComponentMonitor componentMonitor) {
39 this.method = method;
40 this.type = ofType;
41 this.visitInInstantiationOrder = visitInInstantiationOrder;
42 this.componentMonitor = componentMonitor;
43 this.componentInstances = new ArrayList ();
44 }
45
46 public LifecycleVisitor(Method method, Class ofType, boolean visiInInstantiationOrder) {
47 this(method, ofType, visiInInstantiationOrder, NullComponentMonitor.getInstance());
48 }
49
50 public Object traverse(Object node) {
51 componentInstances.clear();
52 try {
53 super.traverse(node);
54 if (!visitInInstantiationOrder) {
55 Collections.reverse(componentInstances);
56 }
57 for (Iterator iterator = componentInstances.iterator(); iterator.hasNext();) {
58 Object o = iterator.next();
59 try {
60 componentMonitor.invoking(method, o);
61 long startTime = System.currentTimeMillis();
62 method.invoke(o, null);
63 componentMonitor.invoked(method, o, System.currentTimeMillis() - startTime);
64 } catch (IllegalArgumentException e) {
65 componentMonitor.invocationFailed(method, o, e);
66 throw new PicoIntrospectionException("Can't call " + method.getName() + " on " + o, e);
67 } catch (IllegalAccessException e) {
68 componentMonitor.invocationFailed(method, o, e);
69 throw new PicoIntrospectionException("Can't call " + method.getName() + " on " + o, e);
70 } catch (InvocationTargetException e) {
71 componentMonitor.invocationFailed(method, o, e);
72 throw new PicoIntrospectionException("Failed when calling " + method.getName() + " on " + o, e.getTargetException());
73 }
74 }
75 } finally {
76 componentInstances.clear();
77 }
78 return Void.TYPE;
79 }
80
81 public void visitContainer(PicoContainer pico) {
82 checkTraversal();
83 componentInstances.addAll(pico.getComponentInstancesOfType(type));
84 }
85
86 public void visitComponentAdapter(ComponentAdapter componentAdapter) {
87 checkTraversal();
88 }
89
90 public void visitParameter(Parameter parameter) {
91 checkTraversal();
92 }
93
94 }
95 |
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