--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/edu/harvard/iq/dataverse/DataverseFacetServiceBean.java	Tue Sep 08 17:00:21 2015 +0200
@@ -0,0 +1,67 @@
+package edu.harvard.iq.dataverse;
+
+import edu.harvard.iq.dataverse.util.LruCache;
+import java.util.List;
+import javax.ejb.Stateless;
+import javax.inject.Named;
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.Query;
+
+/**
+ *
+ * @author xyang
+ * @author Michael Bar-Sinai
+ */
+@Stateless
+@Named
+public class DataverseFacetServiceBean implements java.io.Serializable {
+    
+    public static final LruCache<Long,List<DataverseFacet>> cache = new LruCache();
+    
+    @PersistenceContext(unitName = "VDCNet-ejbPU")
+    private EntityManager em;
+    
+    public List<DataverseFacet> findByDataverseId(Long dataverseId) {
+        List<DataverseFacet> res = cache.get(dataverseId);
+
+        if ( res == null ) {
+            Query query = em.createNamedQuery("DataverseFacet.findByDataverseId", DataverseFacet.class);
+            query.setParameter("dataverseId", dataverseId);
+            res = query.getResultList();
+            cache.put(dataverseId, res);
+        }
+
+        return res; 
+    }
+
+    public void delete(DataverseFacet dataverseFacet) {
+        em.remove(em.merge(dataverseFacet));
+        cache.invalidate();
+    }
+    
+	public void deleteFacetsFor( Dataverse d ) {
+		em.createNamedQuery("DataverseFacet.removeByOwnerId")
+			.setParameter("ownerId", d.getId())
+				.executeUpdate();
+        cache.invalidate(d.getId());
+        
+	}
+	
+    public void create(int diplayOrder, Long datasetFieldId, Long dataverseId) {
+        DataverseFacet dataverseFacet = new DataverseFacet();
+        
+        dataverseFacet.setDisplayOrder(diplayOrder);
+        
+        DatasetFieldType dsfType = (DatasetFieldType)em.find(DatasetFieldType.class,datasetFieldId);
+        dataverseFacet.setDatasetFieldType(dsfType);
+        
+        Dataverse dataverse = (Dataverse)em.find(Dataverse.class,dataverseId);
+        dataverseFacet.setDataverse(dataverse);
+        
+        dataverse.getDataverseFacets().add(dataverseFacet);
+        em.persist(dataverseFacet);
+    }
+    
+}
+