support removing positioning information from a MarkProperties object in AdminConsole

java/com.sap.sailing.shared.server/src/com/sap/sailing/shared/server/SharedSailingData.java

@@ -78,8 +78,18 @@ public interface SharedSailingData extends ReplicableWithObjectInputStream<Repli
      */
     MarkProperties updateMarkProperties(UUID uuid, CommonMarkProperties properties, Positioning positioningInformation, Iterable<String> tags);
 
+    /**
+     * Removes any positioning information from the {@code markProperties} object, regardless of what the positioning was before
+     * (device-based or fixed position or empty);
+     */
+    void clearPositioningForMarkProperties(MarkProperties markProperties);
+    
     /**
      * This overrides a previously set fixed position or associated tracking device.
+     * 
+     * @param position
+     *            must not be {@code null}; use {@link #clearPositioningForMarkProperties} if you'd like to remove any
+     *            positioning assignment from the {@link MarkProperties} object altogether.
      */
     void setFixedPositionForMarkProperties(MarkProperties markProperties, Position position);
     
@@ -87,6 +97,10 @@ public interface SharedSailingData extends ReplicableWithObjectInputStream<Repli
     
     /**
      * This overrides a previously set fixed position or associated tracking device.
+     * 
+     * @param deviceIdentifier
+     *            must not be {@code null}; use {@link #clearPositioningForMarkProperties} if you'd like to remove any
+     *            positioning assignment from the {@link MarkProperties} object altogether.
      */
     void setTrackingDeviceIdentifierForMarkProperties(MarkProperties markProperties, DeviceIdentifier deviceIdentifier);
     

java/com.sap.sailing.shared.server/src/com/sap/sailing/shared/server/impl/SharedSailingDataImpl.java

@@ -291,6 +291,12 @@ public class SharedSailingDataImpl implements ReplicatingSharedSailingData, Clea
         markPropertiesById.put(markProperties.getId(), markProperties);
         return null;
     }
+    
+    @Override
+    public void clearPositioningForMarkProperties(final MarkProperties markProperties) {
+        final UUID markPropertiesUUID = markProperties.getId();
+        apply(s -> s.internalSetPositioningInformationForMarkProperties(markPropertiesUUID, null));
+    }
 
     @Override
     public void setFixedPositionForMarkProperties(final MarkProperties markProperties, final Position position) {