fixing #31

Author: erosb

core/src/main/java/org/everit/json/schema/NumberSchema.java

@@ -183,7 +183,7 @@ public void validate(final Object subject) {
         throw new ValidationException(this, Number.class, subject);
       }
     } else {
-      if (!(subject instanceof Integer) && requiresInteger) {
+      if (!(subject instanceof Integer || subject instanceof Long) && requiresInteger) {
         throw new ValidationException(this, Integer.class, subject);
       }
       double intSubject = ((Number) subject).doubleValue();

core/src/test/java/org/everit/json/schema/NumberSchemaTest.java

@@ -87,4 +87,9 @@ public void typeFailure() {
     NumberSchema.builder().build().validate(null);
   }
 
+  @Test
+  public void longNumber() {
+    NumberSchema.builder().requiresInteger(true).build().validate(Long.valueOf(4278190207L));
+  }
+
 }