--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentLoadFraction.java	Fri Sep 13 16:10:10 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentLoadFraction.java	Fri Sep 13 17:42:09 2013 +0200
@@ -193,31 +193,31 @@
     /** Returns true if all fraction values except SuspSediment are unset. */
     public boolean hasOnlySuspValues() {
         return
-            getSuspSediment() != Double.NaN &&
-            getCoarse() == Double.NaN &&
-            getFineMiddle() == Double.NaN &&
-            getSand() == Double.NaN &&
-            getSuspSand() == Double.NaN;
+            !Double.isNaN(getSuspSediment()) &&
+            Double.isNaN(getCoarse()) &&
+            Double.isNaN(getFineMiddle()) &&
+            Double.isNaN(getSand()) &&
+            Double.isNaN(getSuspSand());
     }
 
     /** Returns true if all fraction values except SuspSediment are set. */
     public boolean hasButSuspValues() {
         return
-            getSuspSediment() == Double.NaN &&
-            getCoarse() != Double.NaN &&
-            getFineMiddle() != Double.NaN &&
-            getSand() != Double.NaN &&
-            getSuspSand() != Double.NaN;
+            Double.isNaN(getSuspSediment()) &&
+            !Double.isNaN(getCoarse()) &&
+            !Double.isNaN(getFineMiddle()) &&
+            !Double.isNaN(getSand()) &&
+            !Double.isNaN(getSuspSand());
     }
 
     /** Returns true if all fraction needed for total calculation are set. */
     public boolean isComplete() {
         return
-            getCoarse() != Double.NaN &&
-            getFineMiddle() != Double.NaN &&
-            getSand() != Double.NaN &&
-            getSuspSand() != Double.NaN &&
-            getSuspSediment() != Double.NaN;
+            !Double.isNaN(getCoarse()) &&
+            !Double.isNaN(getFineMiddle()) &&
+            !Double.isNaN(getSand()) &&
+            !Double.isNaN(getSuspSand()) &&
+            !Double.isNaN(getSuspSediment());
     }
 }
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