1 files changed, 125 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java b/tags/java/sca/2.0-M3-RC3a/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java
new file mode 100644
index 0000000000..8c8ace95ad
--- /dev/null
+++ b/tags/java/sca/2.0-M3-RC3a/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java
@@ -0,0 +1,125 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.tuscany.sca.extensibility.equinox;
+
+import java.util.Dictionary;
+import java.util.Hashtable;
+import java.util.IdentityHashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.core.ModuleActivator;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.ServiceReference;
+import org.osgi.framework.ServiceRegistration;
+
+/**
+ *
+ */
+public class OSGiExtensionPointRegistry extends DefaultExtensionPointRegistry {
+    private Map<Class<?>, ServiceRegistration> services = new ConcurrentHashMap<Class<?>, ServiceRegistration>();
+    private BundleContext bundleContext;
+
+    public OSGiExtensionPointRegistry(BundleContext bundleContext) {
+        super();
+        this.bundleContext = bundleContext;
+    }
+
+    @Override
+    protected <T> Object findExtensionPoint(Class<T> extensionPointType) {
+        ServiceRegistration registration = services.get(extensionPointType);
+        if (registration != null) {
+            ServiceReference ref = registration.getReference();
+            if (ref != null) {
+                return ref.getBundle().getBundleContext().getService(ref);
+            }
+        }
+        /*
+        else {
+            ServiceReference ref = bundleContext.getServiceReference(extensionPointType.getName());
+            if (ref != null) {
+                return bundleContext.getService(ref);
+            }
+        }
+        */
+        return null;
+    }
+
+    @Override
+    protected void registerExtensionPoint(Class<?> i, Object extensionPoint, ServiceDeclaration declaration) {
+        BundleContext context = bundleContext;
+        if (declaration instanceof EquinoxServiceDiscoverer.ServiceDeclarationImpl) {
+            EquinoxServiceDiscoverer.ServiceDeclarationImpl declarationImpl =
+                (EquinoxServiceDiscoverer.ServiceDeclarationImpl)declaration;
+            Bundle bundle = declarationImpl.getBundle();
+            /**
+             * If this bundle is not in the STARTING, ACTIVE, or STOPPING states or this bundle
+             * is a fragment bundle, then this bundle has no valid BundleContext. This method will
+             * return null if this bundle has no valid BundleContext
+             */
+            if ((bundle.getState() & (Bundle.ACTIVE | Bundle.STARTING)) == 0) {
+                try {
+                    bundle.start();
+                } catch (BundleException e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            context = bundle.getBundleContext();
+        }
+        Dictionary<Object, Object> props = new Hashtable<Object, Object>();
+        ServiceRegistration registration = context.registerService(i.getName(), extensionPoint, props);
+        services.put(i, registration);
+    }
+
+    @Override
+    protected void unregisterExtensionPoint(Class<?> i) {
+        ServiceRegistration registration = services.get(i);
+        if (registration != null) {
+            registration.unregister();
+        }
+        services.remove(i);
+    }
+
+    @Override
+    public void destroy() {
+        // Get a unique map as an extension point may exist in the map by different keys
+        Map<ModuleActivator, ModuleActivator> map = new IdentityHashMap<ModuleActivator, ModuleActivator>();
+        for (ServiceRegistration reg : services.values()) {
+            ServiceReference ref = reg.getReference();
+            if (ref != null) {
+                Object service = bundleContext.getService(ref);
+                if (service instanceof ModuleActivator) {
+                    ModuleActivator activator = (ModuleActivator)service;
+                    map.put(activator, activator);
+                }
+                reg.unregister();
+            }
+        }
+        for (ModuleActivator activator : map.values()) {
+            activator.stop(this);
+        }
+        services.clear();
+    }
+
+}