From 81e0357561381fe9d274e757e01259d56bd2c467 Mon Sep 17 00:00:00 2001
From: wing328 <wing328hk@gmail.com>
Date: Sun, 8 Oct 2017 18:38:23 +0800
Subject: [PATCH] fix NPE reported in #6519 (#6635)

---
 .../main/java/io/swagger/codegen/DefaultCodegen.java | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
index 6ebda3dccc5..39af1118cfc 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
@@ -2739,11 +2739,19 @@ public class DefaultCodegen {
     }
 
     public boolean isDataTypeBinary(String dataType) {
-        return dataType.toLowerCase().startsWith("byte");
+        if (dataType != null) {
+            return dataType.toLowerCase().startsWith("byte");
+        } else {
+            return false;
+        }
     }
 
     public boolean isDataTypeFile(String dataType) {
-        return dataType.toLowerCase().equals("file");
+        if (dataType != null) {
+            return dataType.toLowerCase().equals("file");
+        } else {
+            return false;
+        }
     }
 
     /**