content: /**
   *  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.aries.blueprint.spring;
  
  import java.net.URL;
  
  import org.apache.aries.blueprint.NamespaceHandler;
  import org.apache.felix.utils.extender.AbstractExtender;
  import org.apache.felix.utils.extender.Extension;
  import org.osgi.framework.Bundle;
  import org.osgi.framework.ServiceRegistration;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Spring namespace extender.
   * This OSGi extender is responsible for registering spring namespaces for blueprint.
   *
   * @see SpringExtension
   */
  public class Activator extends AbstractExtender {
  
      private static final Logger LOGGER = LoggerFactory.getLogger(Activator.class);
  
      ServiceRegistration<NamespaceHandler> registration;
  
      @Override
      protected Extension doCreateExtension(Bundle bundle) throws Exception {
          URL handlers = bundle.getResource(SpringExtension.SPRING_HANDLERS);
          if (handlers != null) {
              return new SpringExtension(bundle);
          }
          return null;
      }
  
      @Override
      protected void debug(Bundle bundle, String msg) {
          LOGGER.debug(msg + ": " + bundle.getSymbolicName() + "/" + bundle.getVersion());
      }
  
      @Override
      protected void warn(Bundle bundle, String msg, Throwable t) {
          LOGGER.warn(msg + ": " + bundle.getSymbolicName() + "/" + bundle.getVersion(), t);
      }
  
      @Override
      protected void error(String msg, Throwable t) {
          LOGGER.error(msg, t);
      }
  
  }
  