do not read imax for cim if no %imax threshold defined (#1456)

Signed-off-by: Thomas Bouquet <thomas.bouquet@rte-france.com>

Author: bqth29

data/crac/crac-io/crac-io-cim/src/main/java/com/powsybl/openrao/data/crac/io/cim/craccreator/MonitoredSeriesCreator.java

@@ -248,9 +248,20 @@ private MeasurementCreationContext createCnecFromMeasurement(Analog measurement,
         try {
             cnecId = addThreshold(flowCnecAdder, unit, branchHelper, cnecNativeId, direction, threshold);
             setNominalVoltage(flowCnecAdder, branchHelper);
-            IidmCnecElementHelper cnecElementHelper = new IidmCnecElementHelper(branchHelper.getBranch().getId(), network);
-            flowCnecAdder.withIMax(cnecElementHelper.getCurrentLimit(TwoSides.ONE), TwoSides.ONE);
-            flowCnecAdder.withIMax(cnecElementHelper.getCurrentLimit(TwoSides.TWO), TwoSides.TWO);
+            if (Unit.PERCENT_IMAX.equals(unit)) {
+                IidmCnecElementHelper cnecElementHelper = new IidmCnecElementHelper(branchHelper.getBranch().getId(), network);
+                Double currentLimit1 = cnecElementHelper.getCurrentLimit(TwoSides.ONE);
+                Double currentLimit2 = cnecElementHelper.getCurrentLimit(TwoSides.TWO);
+                if (currentLimit1 != null && currentLimit2 != null) {
+                    flowCnecAdder.withIMax(currentLimit1, TwoSides.ONE);
+                    flowCnecAdder.withIMax(currentLimit2, TwoSides.TWO);
+                } else if (currentLimit1 == null) {
+                    flowCnecAdder.withIMax(currentLimit2);
+                } else {
+                    flowCnecAdder.withIMax(currentLimit1);
+                }
+            }
+
         } catch (OpenRaoException e) {
             if (instant.isPreventive()) {
                 measurementCreationContext.addCnecCreationContext(null, instant, CnecCreationContext.notImported(ImportStatus.OTHER, e.getMessage()));