database enum handle implementation

dmp-backend/core/src/main/java/eu/eudat/commons/enums/EnumUtils.java

@@ -0,0 +1,16 @@
+package eu.eudat.commons.enums;
+
+import eu.eudat.data.converters.enums.DatabaseEnum;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class EnumUtils {
+    public static  <EnumType extends Enum<EnumType> & DatabaseEnum<EnumValue>, EnumValue> Map<EnumValue, EnumType>  getEnumValueMap(Class<EnumType> enumType){
+        HashMap<EnumValue, EnumType> map = new HashMap<>();
+        for (EnumType v : enumType.getEnumConstants()) {
+            map.put(v.getValue(), v);
+        }
+        return map;
+    }
+}

dmp-backend/core/src/main/java/eu/eudat/commons/enums/ProviderType.java

@@ -27,13 +27,7 @@ public enum ProviderType implements DatabaseEnum<Integer> {
 
     public Integer getValue() { return this.value; }
 
-    private static final Map<Integer, ProviderType> map;
+    private static final Map<Integer, ProviderType> map = EnumUtils.getEnumValueMap(ProviderType.class);
-    static {
-        map = new HashMap<>();
-        for (ProviderType v : ProviderType.values()) {
-            map.put(v.getValue(), v);
-        }
-    }
     public static ProviderType of(Integer i) {
         return map.get(i);
     }

dmp-backend/core/src/main/java/eu/eudat/commons/enums/Status.java

@@ -20,13 +20,7 @@ public enum Status implements DatabaseEnum<Integer> {
         return value;
     }
 
-    private static final Map<Integer, Status> map;
+    private static final Map<Integer, Status> map = EnumUtils.getEnumValueMap(Status.class);
-    static {
-        map = new HashMap<>();
-        for (Status v : Status.values()) {
-            map.put(v.getValue(), v);
-        }
-    }
     
     public static Status of(Integer i) {
         return map.get(i);