"null" is allowed as seed.

apache · Aug 30, 2016 · bc86f3f · bc86f3f
1 parent 3e8eb56
commit bc86f3f
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Showing 2 changed files with 6 additions and 4 deletions.
diff --git a/src/main/java/org/apache/commons/rng/internal/ProviderBuilder.java b/src/main/java/org/apache/commons/rng/internal/ProviderBuilder.java
@@ -351,7 +351,9 @@ Class<?>[] getArgs() {
          * for this RNG type.
          */
         public <SEED> boolean isNativeSeed(SEED seed) {
-            return getSeed().equals(seed.getClass());
+            return seed == null ?
+                false :
+                getSeed().equals(seed.getClass());
         }
     }
 }
diff --git a/src/test/java/org/apache/commons/rng/ProvidersCommonParametricTest.java b/src/test/java/org/apache/commons/rng/ProvidersCommonParametricTest.java
@@ -249,7 +249,7 @@ public void testAllSeedTypes() {
         final int[] intArraySeed = new int[] { 0, 11, -22, 33, -44, 55, -66, 77, -88, 99 };
         final long[] longArraySeed = new long[] { 11111L, -222222L, 3333333L, -44444444L };
 
-        final Object[] seeds = new Object[] { intSeed, longSeed, intArraySeed, longArraySeed };
+        final Object[] seeds = new Object[] { null, intSeed, longSeed, intArraySeed, longArraySeed };
 
         int nonNativeSeedCount = 0;
         int seedCount = 0;
@@ -263,8 +263,8 @@ public void testAllSeedTypes() {
             RandomSource.create(originalSource, s, originalArgs);
         }
 
-        Assert.assertEquals(4, seedCount);
-        Assert.assertEquals(3, nonNativeSeedCount);
+        Assert.assertEquals(5, seedCount);
+        Assert.assertEquals(4, nonNativeSeedCount);
     }
 
     @Test