submodel connection type mapping changed to string

model/src/main/java/lcsb/mapviewer/model/map/model/SubmodelConnection.java

@@ -6,6 +6,8 @@ import javax.persistence.DiscriminatorColumn;
 import javax.persistence.DiscriminatorType;
 import javax.persistence.DiscriminatorValue;
 import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
@@ -63,6 +65,7 @@ public abstract class SubmodelConnection implements Serializable {
   /**
    * Type of the connection.
    */
+  @Enumerated(EnumType.STRING)
   private SubmodelType type;
 
   /**

persist/src/main/resources/db/migration/12.2.0~alpha.0/V12.2.0.20181024.5__submodel_type_changed_to_string.sql

+-- change in layout
+alter table submodel_connection_table add column type_string varchar(31);
+update submodel_connection_table set type_string='DOWNSTREAM_TARGETS' where type=0;
+update submodel_connection_table set type_string='PATHWAY' where type=1;
+update submodel_connection_table set type_string='UNKNOWN' where type=2;
+
+alter table submodel_connection_table drop column type;
+alter table submodel_connection_table rename column type_string to type;