Initial code drop of yang model driven configuration system

[controller.git] / opendaylight / config / config-manager / src / main / java / org / opendaylight / controller / config / manager / impl / osgi / BundleContextBackedModuleFactoriesResolver.java

diff --git a/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BundleContextBackedModuleFactoriesResolver.java b/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BundleContextBackedModuleFactoriesResolver.java
new file mode 100644 (file)
index 0000000..77bfc49
--- /dev/null
+++ b/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BundleContextBackedModuleFactoriesResolver.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.config.manager.impl.osgi;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.opendaylight.controller.config.manager.impl.factoriesresolver.ModuleFactoriesResolver;
+import org.opendaylight.controller.config.spi.ModuleFactory;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.InvalidSyntaxException;
+import org.osgi.framework.ServiceReference;
+
+/**
+ * Retrieves list of currently registered Module Factories using bundlecontext.
+ */
+public class BundleContextBackedModuleFactoriesResolver implements
+        ModuleFactoriesResolver {
+    private final BundleContext bundleContext;
+
+    public BundleContextBackedModuleFactoriesResolver(
+            BundleContext bundleContext) {
+        this.bundleContext = bundleContext;
+    }
+
+    @Override
+    public List<? extends ModuleFactory> getAllFactories() {
+        Collection<ServiceReference<ModuleFactory>> serviceReferences;
+        try {
+            serviceReferences = bundleContext.getServiceReferences(
+                    ModuleFactory.class, null);
+        } catch (InvalidSyntaxException e) {
+            throw new IllegalStateException(e);
+        }
+        List<ModuleFactory> result = new ArrayList<>(serviceReferences.size());
+        for (ServiceReference<ModuleFactory> serviceReference : serviceReferences) {
+            ModuleFactory service = bundleContext.getService(serviceReference);
+            // null if the service is not registered, the service object
+            // returned by a ServiceFactory does not
+            // implement the classes under which it was registered or the
+            // ServiceFactory threw an exception.
+            if (service != null) {
+                result.add(service);
+            }
+        }
+        return result;
+    }
+}