package com.atlassian.activeobjects.external;
   
   import net.java.ao.Transaction;
   import org.springframework.beans.BeansException;
   import org.springframework.beans.factory.config.BeanPostProcessor;
   
   import static com.atlassian.activeobjects.tx.TransactionalProxy.isAnnotated;
   import static com.atlassian.activeobjects.tx.TransactionalProxy.transactional;
   import static com.google.common.base.Preconditions.checkNotNull;
  
  /**
   * <p>This is the class that processes the {@link com.atlassian.activeobjects.tx.Transactional} annotation
   * within a plugin.</p>
   * <p>Simply add this snippet of code in your plugin descriptor:</p>
   * <code>
   * &lt;component key="tx-annotation-processor" class="com.atlassian.activeobjects.external.TransactionalAnnotationProcessor" /&gt;
   * </code>
   * <p><strong>Note:</strong> This class does not live in the {@link com.atlassian.activeobjects.tx} package in order to
   * be available to plugins without any additional imports (OSGi wise).</p>
   *
   * @see com.atlassian.activeobjects.tx.Transactional
   */
  public final class TransactionalAnnotationProcessor implements BeanPostProcessor {
      private final ActiveObjects ao;
  
      public TransactionalAnnotationProcessor(ActiveObjects ao) {
          // AO-283, http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6588239
          // prevent a sun (Oracle) JVM deadlock.
          Transaction.class.getAnnotations();
  
  
          this.ao = checkNotNull(ao);
      }
  
      public Object postProcessBeforeInitialization(Object o, String s) throws BeansException {
          return o;
      }
  
      public Object postProcessAfterInitialization(Object o, String s) throws BeansException {
          return isAnnotated(o.getClass()) ? transactional(ao, o) : o;
      }
  }