package com.atlassian.activeobjects.osgi;
   
   import org.osgi.framework.Bundle;
   import org.osgi.framework.BundleContext;
   import org.osgi.framework.ServiceRegistration;
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   
   import java.util.HashMap;
  import java.util.Hashtable;
  import java.util.Map;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  /**
   * Default implementation of {@link OsgiServiceUtils}
   */
  public class OsgiServiceUtilsImpl implements OsgiServiceUtils {
      private static final String PROPERTY_KEY = "com.atlassian.plugin.key";
  
      private final Logger logger = LoggerFactory.getLogger(this.getClass());
  
      public <S, O extends S> ServiceRegistration registerService(Bundle bundle, Class<S> ifce, O obj) {
          checkNotNull(bundle);
          checkNotNull(obj);
          final Map<String, String> properties = getProperties(bundle);
  
          logger.debug("Registering service {} with interface {} and properties {}", new Object[]{obj, ifce.getName(), properties});
  
          return getContext(bundle).registerService(ifce.getName(), obj, new Hashtable<String, String>(properties));
      }
  
      Map<String, String> getProperties(Bundle bundle) {
          final Map<String, String> props = new HashMap<String, String>();
          props.put(PROPERTY_KEY, bundle.getSymbolicName());
          return props;
      }
  
      private BundleContext getContext(Bundle bundle) {
          return bundle.getBundleContext();
      }
  
  }