/**
   * Intelligently merges the given RegionAttributes with the configuration setting of the
   * RegionFactory. This method is used to merge the RegionAttributes and PartitionAttributes with
   * the RegionFactory that is created when the user specified a RegionShortcut. This method gets
   * called by the createRegionFactory method depending upon the value passed to the
   * Cache.createRegionFactory() method (i.e. whether there was a RegionShortcut specified or not).
   *
   * @param <K> the Class type fo the Region key.
   * @param <V> the Class type of the Region value.
   * @param regionFactory the GemFire RegionFactory used to configure and create the Region that is
   *     the product of this RegionFactoryBean.
   * @param regionAttributes the RegionAttributes containing the Region configuration settings to
   *     merge to the RegionFactory.
   * @return the RegionFactory with the configuration settings of the RegionAttributes merged.
   * @see #isUserSpecifiedEvictionAttributes(com.gemstone.gemfire.cache.RegionAttributes)
   * @see #validateRegionAttributes(com.gemstone.gemfire.cache.RegionAttributes)
   * @see com.gemstone.gemfire.cache.RegionAttributes
   * @see com.gemstone.gemfire.cache.RegionFactory
   */
  @SuppressWarnings("unchecked")
  protected <K, V> RegionFactory<K, V> mergeRegionAttributes(
      final RegionFactory<K, V> regionFactory, final RegionAttributes<K, V> regionAttributes) {

    if (regionAttributes != null) {
      // NOTE this validation may not be strictly required depending on how the RegionAttributes
      // were "created",
      // but...
      validateRegionAttributes(regionAttributes);

      regionFactory.setCloningEnabled(regionAttributes.getCloningEnabled());
      regionFactory.setCompressor(regionAttributes.getCompressor());
      regionFactory.setConcurrencyChecksEnabled(regionAttributes.getConcurrencyChecksEnabled());
      regionFactory.setConcurrencyLevel(regionAttributes.getConcurrencyLevel());
      regionFactory.setCustomEntryIdleTimeout(regionAttributes.getCustomEntryIdleTimeout());
      regionFactory.setCustomEntryTimeToLive(regionAttributes.getCustomEntryTimeToLive());
      regionFactory.setDiskSynchronous(regionAttributes.isDiskSynchronous());
      regionFactory.setEnableAsyncConflation(regionAttributes.getEnableAsyncConflation());
      regionFactory.setEnableSubscriptionConflation(
          regionAttributes.getEnableSubscriptionConflation());
      regionFactory.setEntryIdleTimeout(regionAttributes.getEntryIdleTimeout());
      regionFactory.setEntryTimeToLive(regionAttributes.getEntryTimeToLive());

      // NOTE EvictionAttributes are created by certain RegionShortcuts; need the null check!
      if (isUserSpecifiedEvictionAttributes(regionAttributes)) {
        regionFactory.setEvictionAttributes(regionAttributes.getEvictionAttributes());
      }

      regionFactory.setIgnoreJTA(regionAttributes.getIgnoreJTA());
      regionFactory.setIndexMaintenanceSynchronous(
          regionAttributes.getIndexMaintenanceSynchronous());
      regionFactory.setInitialCapacity(regionAttributes.getInitialCapacity());
      regionFactory.setKeyConstraint(regionAttributes.getKeyConstraint());
      regionFactory.setLoadFactor(regionAttributes.getLoadFactor());
      regionFactory.setLockGrantor(regionAttributes.isLockGrantor());
      regionFactory.setMembershipAttributes(regionAttributes.getMembershipAttributes());
      regionFactory.setMulticastEnabled(regionAttributes.getMulticastEnabled());
      mergePartitionAttributes(regionFactory, regionAttributes);
      regionFactory.setPoolName(regionAttributes.getPoolName());
      regionFactory.setRegionIdleTimeout(regionAttributes.getRegionIdleTimeout());
      regionFactory.setRegionTimeToLive(regionAttributes.getRegionTimeToLive());
      regionFactory.setStatisticsEnabled(regionAttributes.getStatisticsEnabled());
      regionFactory.setSubscriptionAttributes(regionAttributes.getSubscriptionAttributes());
      regionFactory.setValueConstraint(regionAttributes.getValueConstraint());
    }

    return regionFactory;
  }