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1 package org.picocontainer.gems.monitors;
2
3 import java.lang.reflect.Constructor  ;
4
5 import org.picocontainer.defaults.DelegatingComponentMonitor;
6 import org.picocontainer.gems.monitors.prefuse.ComponentDependencyListener;
7
8
15 public class ComponentDependencyMonitor extends DelegatingComponentMonitor {
16
17 private final ComponentDependencyListener listener;
18
19 public ComponentDependencyMonitor(ComponentDependencyListener listener) {
20 this.listener = listener;
21 }
22
23 public void instantiated(Constructor constructor, Object instantiated, Object [] injected, long duration) {
24 Class componentType = instantiated.getClass();
25 int count = injected.length;
26
27 if (count == 0) {
28 listener.addDependency(new Dependency(componentType, null));
29 }
30
31 for (int i = 0; i < count; i++) {
32 Object dependent = injected[i];
33 Dependency dependency = new Dependency(componentType, dependent.getClass());
34 listener.addDependency(dependency);
35 }
36 }
37
38
44 public static class Dependency {
45
46 private Class componentType;
47
48 private Class dependencyType;
49
50 public Dependency(Class componentType, Class dependencyType) {
51 this.componentType = componentType;
52 this.dependencyType = dependencyType;
53 }
54
55 public boolean dependsOn(Class type) {
56 return (type == null) ? false : type.equals(dependencyType);
57 }
58
59 public boolean equals(Object other) {
60 if (other instanceof Dependency) {
61 Dependency otherDependency = (Dependency) other;
62 return areEqualOrNull(componentType, otherDependency.componentType)
63 && areEqualOrNull(dependencyType, otherDependency.dependencyType);
64 }
65 return false;
66 }
67
68 public Class getComponentType() {
69 return componentType;
70 }
71
72 public Class getDependencyType() {
73 return dependencyType;
74 }
75
76 public String toString() {
77 return componentType + " depends on " + dependencyType;
78 }
79
80 private static boolean areEqualOrNull(Class type, Class otherType) {
81 if (type != null) {
82 return type.equals(otherType);
83 }
84 return (type == null && otherType == null);
85 }
86 }
87 }
88 |
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