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1
25
26 package org.objectweb.easybeans.container.archive;
27
28 import java.lang.reflect.ParameterizedType  ;
29 import java.lang.reflect.Type ;
30 import java.util.HashMap ;
31 import java.util.Map ;
32
33 import org.objectweb.easybeans.api.EZBArchive;
34 import org.objectweb.easybeans.api.EZBArchiveFactory;
35 import org.objectweb.easybeans.log.JLog;
36 import org.objectweb.easybeans.log.JLogFactory;
37
38
42 public final class ArchiveManager {
43
44
47 private static JLog logger = JLogFactory.getLog(ArchiveManager.class);
48
49
52 private static ArchiveManager archiveManager;
53
54
58 private Map <Class , EZBArchiveFactory> factories = new HashMap <Class , EZBArchiveFactory>();
59
60
63 private ArchiveManager() {
64 addFactory(new DefaultArchiveFactory());
65 }
66
67
71 public static ArchiveManager getInstance() {
72 if (archiveManager == null) {
73 archiveManager = new ArchiveManager();
74 }
75 return archiveManager;
76 }
77
78
83 public void addFactory(final EZBArchiveFactory factory) {
84
85 Class factoryClass = factory.getClass();
86 Class argumentClass = getSupportedType(factoryClass);
87
88 logger.debug("Adding factory '" + factoryClass.getName() + "' for class '" + argumentClass + "'.");
89
90 factories.put(argumentClass, factory);
92
93 }
94
95
102 private Class getSupportedType(final Class factoryClass) {
103
104 Type [] generics = factoryClass.getGenericInterfaces();
106
107 if (generics.length != 1) {
109 throw new IllegalArgumentException ("Invalid class, supports only class with a single generic");
110 }
111
112 Type factoryClassType = generics[0];
114 ParameterizedType parameterType = null;
115
116 if (factoryClassType instanceof ParameterizedType ) {
117 parameterType = (ParameterizedType ) factoryClassType;
118 } else {
119 throw new IllegalArgumentException ("Object '" + factoryClassType + "' is not a ParameterizedType");
120 }
121
122 Type [] arguments = parameterType.getActualTypeArguments();
123 if (arguments.length != 1) {
124 throw new IllegalArgumentException ("Invalid class, supports only class with a single generic");
125 }
126 return (Class ) arguments[0];
127 }
128
129
134 public void removeFactory(final EZBArchiveFactory factory) {
135
136 Class factoryClass = factory.getClass();
137 Class argumentClass = getSupportedType(factoryClass);
138
139 if (factories.containsKey(argumentClass)) {
140 logger.debug("Removing factory '" + factoryClass.getName() + "' for class '" + argumentClass + "'.");
141
142 factories.remove(argumentClass);
144 } else {
145 logger.debug("Factory '" + factoryClass.getName() + "' was not registered in the ArchiveManager.");
146 }
147 }
148
149
154 @SuppressWarnings ("unchecked")
155 public EZBArchive getArchive(final Object o) {
156 Class objectClass = o.getClass();
158
159 EZBArchiveFactory factory = factories.get(objectClass);
161
162 if (factory == null) {
163
164 for (Class cls : factories.keySet()) {
166 if (cls.isAssignableFrom(objectClass) && factory == null) {
167 factory = factories.get(cls);
169 }
170 }
171
172 if (factory == null) {
174 throw new IllegalArgumentException ("No factory found for the type '" + objectClass + "'.");
175 }
176 }
177
178 return factory.create(o);
179 }
180
181 }
182 |
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