major classes refactoring

src/main/java/com/commafeed/backend/dao/ApplicationSettingsDAO.java

@@ -0,0 +1,34 @@
+package com.commafeed.backend.dao;
+
+import java.util.List;
+
+import javax.ejb.Stateless;
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+import com.commafeed.backend.model.ApplicationSettings;
+import com.google.common.collect.Iterables;
+import com.uaihebert.factory.EasyCriteriaFactory;
+import com.uaihebert.model.EasyCriteria;
+
+@Stateless
+public class ApplicationSettingsDAO {
+
+	@PersistenceContext
+	protected EntityManager em;
+
+	public void save(ApplicationSettings settings) {
+		if (settings.getId() == null) {
+			em.persist(settings);
+		} else {
+			em.merge(settings);
+		}
+	}
+
+	public ApplicationSettings get() {
+		EasyCriteria<ApplicationSettings> criteria = EasyCriteriaFactory
+				.createQueryCriteria(em, ApplicationSettings.class);
+		List<ApplicationSettings> list = criteria.getResultList();
+		return Iterables.getFirst(list, null);
+	}
+}