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.io.IOException;
  import java.net.URL;
  import java.util.ArrayList;
  import java.util.Enumeration;
  import java.util.List;
  import java.util.NoSuchElementException;
  
  import org.apache.aries.blueprint.services.ExtendedBlueprintContainer;
  import org.osgi.framework.Bundle;
  import org.osgi.framework.wiring.BundleWiring;
  import org.springframework.beans.BeansException;
  import org.springframework.beans.factory.support.DefaultListableBeanFactory;
  import org.springframework.context.support.AbstractApplicationContext;
  
  public class SpringApplicationContext extends AbstractApplicationContext {
  
      private final ExtendedBlueprintContainer container;
      private final DefaultListableBeanFactory beanFactory;
      private final List<ClassLoader> parentClassLoaders = new ArrayList<ClassLoader>();
  
      public SpringApplicationContext(ExtendedBlueprintContainer container) {
          this.container = container;
          parentClassLoaders.add(container.getClassLoader());
          setClassLoader(new ClassLoader() {
              @Override
              public Class<?> loadClass(String name) throws ClassNotFoundException {
                  for (ClassLoader cl : parentClassLoaders) {
                      try {
                          return cl.loadClass(name);
                      } catch (ClassNotFoundException e) {
                          // Ignore
                      }
                  }
                  throw new ClassNotFoundException(name);
              }
  
              @Override
              public URL getResource(String name) {
                  for (ClassLoader cl : parentClassLoaders) {
                      URL url =  cl.getResource(name);
                      if (url != null) {
                          return url;
                      }
                  }
                  return null;
              }
  
              @Override
              public Enumeration<URL> getResources(String name) throws IOException {
                  final Enumeration<URL>[] enums = (Enumeration<URL>[]) new Enumeration<?>[parentClassLoaders.size()];
                  for (int i = 0; i < enums.length; i++) {
                      enums[i] = parentClassLoaders.get(i).getResources(name);
                  }
                  return new Enumeration<URL>() {
                      private int index = 0;
                      @Override
                      public boolean hasMoreElements() {
                          return next();
                      }
                      @Override
                      public URL nextElement() {
                          if (!this.next()) {
                              throw new NoSuchElementException();
                          } else {
                              return enums[this.index].nextElement();
                          }
                      }
                      private boolean next() {
                          while(this.index < enums.length) {
                              if (enums[this.index] != null && enums[this.index].hasMoreElements()) {
                                  return true;
                              }
                              ++this.index;
                          }
                          return false;
                      }
                  };
              }
          });
          this.beanFactory = new BlueprintBeanFactory(container, this);
          prepareBeanFactory(beanFactory);
          prepareRefresh();
      }
  
      public void process() {
          // Invoke factory processors registered as beans in the context.
          invokeBeanFactoryPostProcessors(beanFactory);
          // Register bean processors that intercept bean creation.
          registerBeanPostProcessors(beanFactory);
      }
  
      @Override
      protected void refreshBeanFactory() throws BeansException, IllegalStateException {
      }
  
      @Override
      protected void closeBeanFactory() {
      }
  
      @Override
      public DefaultListableBeanFactory getBeanFactory() throws IllegalStateException {
          return beanFactory;
      }
  
      public void addSourceBundle(Bundle bundle) {
          // This should always be not null, but we want to support unit testing
          if (bundle != null) {
              parentClassLoaders.add(bundle.adapt(BundleWiring.class).getClassLoader());
          }
      }
  
  }
  