1 files changed, 58 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo.releng.setup/src/org/eclipse/emf/cdo/releng/setup/util/ServiceUtil.java b/plugins/org.eclipse.emf.cdo.releng.setup/src/org/eclipse/emf/cdo/releng/setup/util/ServiceUtil.java
new file mode 100644
index 0000000000..c4fa29fd7f
--- /dev/null
+++ b/plugins/org.eclipse.emf.cdo.releng.setup/src/org/eclipse/emf/cdo/releng/setup/util/ServiceUtil.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2013 Eike Stepper (Berlin, Germany) 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
+ *
+ * Contributors:
+ *    Eike Stepper - initial API and implementation
+ */
+package org.eclipse.emf.cdo.releng.setup.util;
+
+import org.eclipse.emf.cdo.releng.internal.setup.Activator;
+
+import org.eclipse.core.runtime.Plugin;
+
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
+
+import java.util.IdentityHashMap;
+import java.util.Map;
+
+/**
+ * @author Eike Stepper
+ */
+public final class ServiceUtil extends Plugin
+{
+  private static BundleContext bundleContext = Activator.getBundleContext();
+
+  private static Map<Object, ServiceReference<?>> services = new IdentityHashMap<Object, ServiceReference<?>>();
+
+  public static <T> T getService(Class<T> serviceClass)
+  {
+    String serviceName = serviceClass.getName();
+    ServiceReference<?> serviceRef = bundleContext.getServiceReference(serviceName);
+    if (serviceRef == null)
+    {
+      throw new IllegalStateException("Missing OSGi service " + serviceName);
+    }
+
+    @SuppressWarnings("unchecked")
+    T service = (T)bundleContext.getService(serviceRef);
+    services.put(service, serviceRef);
+    return service;
+  }
+
+  public static void ungetService(Object service)
+  {
+    if (service != null)
+    {
+      ServiceReference<?> serviceRef = services.remove(service);
+      if (serviceRef != null)
+      {
+        bundleContext.ungetService(serviceRef);
+      }
+    }
+  }
+}