Another NPE test: when the atomicNumber doesn't correspond to a isoto…

…pe list Change-Id: I9e25735117668c7c5e5b30336be39d0db2710816 Signed-off-by: John May <john.wilkinsonmay@gmail.com>
cdk · Oct 21, 2013 · 0debacc · 0debacc
1 parent 1fb8356
commit 0debacc
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/main/org/openscience/cdk/config/Isotopes.java b/src/main/org/openscience/cdk/config/Isotopes.java
@@ -201,6 +201,7 @@ public IIsotope getIsotope(String symbol, double exactMass, double tolerance) {
      */
     @TestMethod("testGetMajorIsotope_int")
     public IIsotope getMajorIsotope(int atomicNumber) {
+    	if (isotopes.get(PeriodicTable.getSymbol(atomicNumber)) == null) return null;
         IIsotope major = null;
         for (IIsotope isotope : isotopes.get(PeriodicTable.getSymbol(atomicNumber))) {
             if (isotope.getAtomicNumber() == atomicNumber) {