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1
8 package org.codehaus.aspectwerkz.transform.inlining.deployer;
9
10 import java.util.Map  ;
11 import java.util.HashMap ;
12 import java.util.Iterator ;
13 import java.util.Set ;
14 import java.lang.ref.WeakReference ;
15
16 import org.codehaus.aspectwerkz.util.UuidGenerator;
17 import org.codehaus.aspectwerkz.definition.AdviceDefinition;
18 import org.codehaus.aspectwerkz.definition.SystemDefinitionContainer;
19 import org.codehaus.aspectwerkz.definition.SystemDefinition;
20 import org.codehaus.aspectwerkz.definition.AspectDefinition;
21 import org.codehaus.aspectwerkz.expression.ExpressionInfo;
22
23
32 public final class DeploymentHandle {
33
34 private final String UUID;
35 private final Map m_definitionChangeElements = new HashMap ();
36 private final WeakReference m_loaderRef;
37 private final WeakReference m_classRef;
38
39
44 DeploymentHandle(final Class clazz, final ClassLoader loader) {
45 if (clazz == null) {
46 throw new IllegalArgumentException ("class can not be null");
47 }
48 if (loader == null) {
49 throw new IllegalArgumentException ("loader can not be null");
50 }
51 UUID = UuidGenerator.generate(clazz);
52 m_loaderRef = new WeakReference (loader);
53 m_classRef = new WeakReference (clazz);
54 }
55
56 void registerDefinitionChange(final AdviceDefinition adviceDef, final ExpressionInfo oldExpression) {
57 m_definitionChangeElements.put(
58 adviceDef.getQualifiedName(),
59 new DefinitionChangeElement(adviceDef, oldExpression)
60 );
61 }
62
63 Class getAspectClass() {
64 return (Class ) m_classRef.get();
65 }
66
67 Map getDefintionChangeElements() {
68 return m_definitionChangeElements;
69 }
70
71 void revertChanges() {
72 final ClassLoader loader = (ClassLoader ) m_loaderRef.get();
73 SystemDefinition systemDef = SystemDefinitionContainer.getVirtualDefinitionAt(loader);
75 for (Iterator it2 = systemDef.getAspectDefinitions().iterator(); it2.hasNext();) {
76 AspectDefinition aspectDef = (AspectDefinition) it2.next();
77 for (Iterator it3 = aspectDef.getAfterAdviceDefinitions().iterator(); it3.hasNext();) {
78 AdviceDefinition adviceDef = (AdviceDefinition) it3.next();
79 DefinitionChangeElement changeElement =
80 (DefinitionChangeElement) m_definitionChangeElements.get(adviceDef.getQualifiedName());
81 if (changeElement != null) {
82 changeElement.getAdviceDef().setExpressionInfo(changeElement.getOldExpression());
83 }
84 }
85 }
86 }
87
88 public String toString() {
89 return new StringBuffer ().append("DeploymentHandle [").
90 append(UUID.toString()).append(',').
91 append(((Class ) m_classRef.get()).getName()).append(',').
92 append((ClassLoader ) m_loaderRef.get()).append(']').toString();
93 }
94
95 public int hashCode() {
96 return UUID.hashCode();
97 }
98
99 public boolean equals(Object o) {
100 return ((DeploymentHandle) o).UUID.equals(UUID);
101 }
102
103
108 static class DefinitionChangeElement {
109 private final AdviceDefinition m_adviceDef;
110 private final ExpressionInfo m_oldExpression;
111
112 public DefinitionChangeElement(final AdviceDefinition adviceDef, final ExpressionInfo oldExpression) {
113 m_adviceDef = adviceDef;
114 m_oldExpression = oldExpression;
115 }
116
117 public ExpressionInfo getOldExpression() {
118 return m_oldExpression;
119 }
120
121 public AdviceDefinition getAdviceDef() {
122 return m_adviceDef;
123 }
124 }
125 }
126 |
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