--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/de/mpiwg/indexmeta/services/PersistentService.java	Fri Apr 12 17:48:42 2013 +0200
@@ -0,0 +1,71 @@
+package de.mpiwg.indexmeta.services;
+
+import java.util.List;
+
+import javax.persistence.Query;
+
+import de.mpiwg.indexmeta.bo.Contextualization;
+import de.mpiwg.indexmeta.utils.QuadMap;
+
+public class PersistentService {
+
+	private QuadMap<Contextualization> ctxMap = null;
+    private javax.persistence.EntityManagerFactory emf;
+    private javax.persistence.EntityManager em;
+    private String PERSISTENCE_UNIT_NAME = "uno";
+
+
+	public QuadMap<Contextualization> getCtxMap() {
+		if(ctxMap == null){
+			this.loadCtxMap();
+		}
+		return ctxMap;
+	}
+	
+	public void saveCtx(Contextualization ctx){
+		System.out.println("Saving= " + ctx.toString());
+		
+		initEntityManager();
+		em.getTransaction().begin();
+		
+		em.persist(ctx);
+		ctxMap.put(ctx.getKey(), ctx);
+		
+		em.getTransaction().commit();
+		closeEntityManager();
+		
+		System.out.println("Saved= " + ctx.toString());
+	}
+	
+	
+	private void loadCtxMap(){
+		ctxMap = new QuadMap<Contextualization>();
+		
+		initEntityManager();
+		em.getTransaction().begin();
+
+		Query q = em.createQuery("from Contextualization");
+		List<Contextualization> list =  q.getResultList();
+				
+		for(Contextualization ctx : list){
+			ctxMap.put(ctx.getKey(), ctx);
+		}
+	        
+		em.getTransaction().commit();
+		closeEntityManager();
+	}
+	
+	
+    private void initEntityManager() {
+        emf = javax.persistence.Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
+        em = emf.createEntityManager();
+    }
+
+    private void closeEntityManager() {
+        em.close();
+        emf.close();
+    }
+	
+	
+	
+}