HHH-7089 Return naturalId cache region instead of null

Author: edalquist

hibernate-ehcache/src/main/java/org/hibernate/cache/ehcache/AbstractEhcacheRegionFactory.java

@@ -35,6 +35,7 @@
 import org.hibernate.cache.ehcache.internal.nonstop.NonstopAccessStrategyFactory;
 import org.hibernate.cache.ehcache.internal.regions.EhcacheCollectionRegion;
 import org.hibernate.cache.ehcache.internal.regions.EhcacheEntityRegion;
+import org.hibernate.cache.ehcache.internal.regions.EhcacheNaturalIdRegion;
 import org.hibernate.cache.ehcache.internal.regions.EhcacheQueryResultsRegion;
 import org.hibernate.cache.ehcache.internal.regions.EhcacheTimestampsRegion;
 import org.hibernate.cache.ehcache.internal.strategy.EhcacheAccessStrategyFactory;
@@ -134,8 +135,7 @@ public EntityRegion buildEntityRegion(String regionName, Properties properties,
  @Override
  public NaturalIdRegion buildNaturalIdRegion(String regionName, Properties properties, CacheDataDescription metadata)
  throws CacheException {
- // TODO Auto-generated method stub
- return null;
+ return new EhcacheNaturalIdRegion( accessStrategyFactory, getCache( regionName ), settings, metadata, properties );
  }
 
  /**