Merge pull request #163 from itesla/temporary_limit_value

Add convenient method to get temporary limit value

iidm-network-api/src/main/java/eu/itesla_project/iidm/network/CurrentLimits.java

@@ -82,4 +82,12 @@ interface TemporaryLimit {
      * @return the temporary limit
      */
     TemporaryLimit getTemporaryLimit(int acceptableDuration);
+
+    /**
+     * Get a temporary limit value from its acceptable duration. Return NaN if there is non temporay limit with this
+     * acceptable duration.
+     * @param acceptableDuration acceptable duration in second
+     * @return the temporary limit value or NaN if there is no temporary limit for this acceptable duration
+     */
+    float getTemporaryLimitValue(int acceptableDuration);
 }

iidm-network-impl/src/main/java/eu/itesla_project/iidm/network/impl/CurrentLimitsImpl.java

@@ -78,4 +78,10 @@ public Collection<TemporaryLimit> getTemporaryLimits() {
     public TemporaryLimit getTemporaryLimit(int acceptableDuration) {
         return temporaryLimits.get(acceptableDuration);
     }
+
+    @Override
+    public float getTemporaryLimitValue(int acceptableDuration) {
+        TemporaryLimit tl = getTemporaryLimit(acceptableDuration);
+        return tl != null ? tl.getValue() : Float.NaN;
+    }
 }