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1
87 package org.codehaus.loom.components.application;
88
89 import org.codehaus.loom.components.util.info.ComponentInfo;
90 import org.codehaus.loom.components.util.info.ServiceDescriptor;
91 import org.codehaus.loom.components.util.metadata.ComponentTemplate;
92 import org.codehaus.loom.components.util.profile.ComponentProfile;
93
94
99 class BlockEntry
100 {
101 private static final Class  BLOCK_CLASS = getBlockClass();
102
103 private Object m_object;
104 private final ComponentProfile m_componentProfile;
105 private BlockInvocationHandler m_invocationHandler;
106
107 public BlockEntry( final ComponentProfile componentProfile )
108 {
109 invalidate();
110 m_componentProfile = componentProfile;
111 }
112
113 public ComponentInfo getInfo()
114 {
115 return m_componentProfile.getInfo();
116 }
117
118 public ComponentTemplate getTemplate()
119 {
120 return m_componentProfile.getTemplate();
121 }
122
123 public String getName()
124 {
125 return m_componentProfile.getTemplate().getName();
126 }
127
128 public synchronized Object getObject()
129 {
130 return m_object;
131 }
132
133 public synchronized void setObject( final Object object )
134 {
135 invalidate();
136
137 if( null != object &&
138 !m_componentProfile.getTemplate().isDisableProxy() )
139 {
140 final ComponentInfo blockInfo = m_componentProfile.getInfo();
141 final Class [] interfaces = getServiceClasses( object,
142 blockInfo.getServices() );
143 m_invocationHandler =
144 new BlockInvocationHandler( object, interfaces );
145 }
146 m_object = object;
147 }
148
149 public synchronized Object getProxy()
150 {
151 if( m_componentProfile.getTemplate().isDisableProxy() )
152 {
153 return m_object;
154 }
155 else
156 {
157 if( null != m_invocationHandler )
158 {
159 return m_invocationHandler.getProxy();
160 }
161 else
162 {
163 return null;
164 }
165 }
166 }
167
168 synchronized void invalidate()
169 {
170 if( null != m_invocationHandler )
171 {
172 m_invocationHandler.invalidate();
173 m_invocationHandler = null;
174 }
175 m_object = null;
176 }
177
178 private Class [] getServiceClasses( final Object block,
179 final ServiceDescriptor[] services )
180 {
181 final Class [] classes = new Class [ services.length + 1 ];
182 final ClassLoader classLoader = block.getClass().getClassLoader();
183
184 for( int i = 0; i < services.length; i++ )
185 {
186 try
187 {
188 classes[ i ] =
189 classLoader.loadClass( services[ i ].getType() );
190 }
191 catch( final Throwable throwable )
192 {
193 }
195 }
196
197 classes[ services.length ] = BLOCK_CLASS;
205 return classes;
206 }
207
208 private static Class getBlockClass()
209 {
210 try
211 {
212 return Class.forName( "org.apache.avalon.phoenix.Block" );
213 }
214 catch( ClassNotFoundException e )
215 {
216 throw new IllegalStateException ( "Can not find block class" );
217 }
218 }
219 }
220 |
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