From 9090b2c66e90136469ca1bdc47baad96753af234 Mon Sep 17 00:00:00 2001
From: Joern Muehlencord <joern@muehlencord.de>
Date: Sun, 16 Feb 2020 13:42:58 +0100
Subject: [PATCH] added find by query method

---
 .../de/muehlencord/shared/db/AbstractController.java   | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/db/src/main/java/de/muehlencord/shared/db/AbstractController.java b/db/src/main/java/de/muehlencord/shared/db/AbstractController.java
index 859df50..1679c7e 100644
--- a/db/src/main/java/de/muehlencord/shared/db/AbstractController.java
+++ b/db/src/main/java/de/muehlencord/shared/db/AbstractController.java
@@ -24,6 +24,7 @@ import java.util.Map;
 import javax.ejb.Lock;
 import javax.ejb.LockType;
 import javax.persistence.EntityGraph;
+import javax.persistence.Query;
 import javax.persistence.TypedQuery;
 import javax.persistence.criteria.CriteriaBuilder;
 import javax.persistence.criteria.CriteriaQuery;
@@ -78,6 +79,15 @@ public abstract class AbstractController<T extends Serializable> extends CommonA
         T entity = (T) em.find(entityClass, id, hints);
         return entity;
     }
+    
+    @Lock(LockType.READ)
+    public List<T> find(String queryName, Map<String, Object> parameterMap) throws ControllerException {
+      Query query = em.createNamedQuery(queryName); 
+      parameterMap.entrySet().forEach((entry) -> {
+        query.setParameter(entry.getKey(), entry.getValue());
+      });
+      return query.getResultList();
+    }
 
     /**
      * returns a list of all entities.