[jboss-cvs] JBossAS SVN: r102678 - projects/jboss-osgi/projects/runtime/framework/branches/tdiesler/core/src/main/java/org/jboss/osgi/framework/bundle.

[jboss-cvs-commits at lists.jboss.org]

Author: thomas.diesler at jboss.com
Date: 2010-03-21 01:05:14 -0400 (Sun, 21 Mar 2010)
New Revision: 102678

Added:
   projects/jboss-osgi/projects/runtime/framework/branches/tdiesler/core/src/main/java/org/jboss/osgi/framework/bundle/OSGiControllerContext.java
Log:
wip

Added: projects/jboss-osgi/projects/runtime/framework/branches/tdiesler/core/src/main/java/org/jboss/osgi/framework/bundle/OSGiControllerContext.java
===================================================================
--- projects/jboss-osgi/projects/runtime/framework/branches/tdiesler/core/src/main/java/org/jboss/osgi/framework/bundle/OSGiControllerContext.java	                        (rev 0)
+++ projects/jboss-osgi/projects/runtime/framework/branches/tdiesler/core/src/main/java/org/jboss/osgi/framework/bundle/OSGiControllerContext.java	2010-03-21 05:05:14 UTC (rev 102678)
@@ -0,0 +1,122 @@
+/*
+* JBoss, Home of Professional Open Source
+* Copyright 2009, Red Hat Middleware LLC, and individual contributors
+* as indicated by the @author tags. See the copyright.txt file in the
+* distribution for a full listing of individual contributors.
+*
+* This is free software; you can redistribute it and/or modify it
+* under the terms of the GNU Lesser General Public License as
+* published by the Free Software Foundation; either version 2.1 of
+* the License, or (at your option) any later version.
+*
+* This software is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this software; if not, write to the Free
+* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+*/
+package org.jboss.osgi.framework.bundle;
+
+import java.util.Dictionary;
+import java.util.Enumeration;
+import java.util.Set;
+
+import org.jboss.dependency.plugins.AbstractControllerContext;
+import org.jboss.dependency.spi.tracker.ContextTracker;
+import org.jboss.util.collection.CollectionsFactory;
+import org.jboss.util.id.GUID;
+
+/**
+ * OSGiServiceState.
+ * 
+ * @author thomas.diesler at jboss.com
+ * @since 20-Mar-2010
+ */
+public class OSGiControllerContext extends AbstractControllerContext
+{
+   /** The alias constant */
+   private static final String SERVICE_ALIAS = "service.alias";
+
+   @SuppressWarnings({ "rawtypes", "unchecked" })
+   public OSGiControllerContext(Object service, Dictionary properties)
+   {
+      super(GUID.asString(), getAlias(properties), OSGiControllerContextActions.ACTIONS, null, service);
+   }
+
+   @Override
+   public Object getTarget(ContextTracker tracker)
+   {
+      // This changes the order of functionality to: 
+      //
+      // #1 incrementing usage count
+      // #2 obtain the result
+      //
+      // The reason is that the OSGi {@link ServiceFactory} getService() method
+      // is called with a {@link ServiceReference} that expects the given tracker 
+      // (i.e. the using bundle) already be included in getUsingBundles.  
+      
+      if (tracker != null)
+      {
+         ContextTracker myTracker = getContextTracker();
+         if (myTracker != null && myTracker != tracker)
+            myTracker.incrementUsedBy(this, tracker);
+         
+         tracker.incrementUsedBy(this, tracker);
+      }
+      
+      Object result = getTargetForActualUser(tracker);
+      return result;
+   }
+
+   @Override
+   public Object ungetTarget(ContextTracker tracker)
+   {
+      // This changes the order of functionality to: 
+      //
+      // #1 obtain the result
+      // #2 decrementing usage count
+      //
+      // The reason is that the OSGi {@link ServiceFactory} ungetService() method
+      // is called with a {@link ServiceReference} that expects the given tracker 
+      // (i.e. the using bundle) already be included in getUsingBundles.
+      
+      Object result = ungetTargetForActualUser(tracker);
+      if (tracker != null)
+      {
+         ContextTracker myTracker = getContextTracker();
+         if (myTracker != null && myTracker != tracker)
+            myTracker.decrementUsedBy(this, tracker);
+
+         tracker.decrementUsedBy(this, tracker);
+      }
+      return result;
+   }
+
+   // Check if there is an alias in properties.
+   private static Set<Object> getAlias(Dictionary<String, Object> properties)
+   {
+      if (properties != null)
+      {
+         Set<Object> aliases = null;
+         Enumeration<String> keys = properties.keys();
+         while (keys.hasMoreElements())
+         {
+            String key = keys.nextElement();
+            if (key.startsWith(SERVICE_ALIAS))
+            {
+               if (aliases == null)
+                  aliases = CollectionsFactory.createLazySet();
+
+               Object alias = properties.get(key);
+               aliases.add(alias);
+            }
+         }
+         return aliases;
+      }
+      return null;
+   }
+}