From 804b1bbb87271424dad75e1be893f31e410e9114 Mon Sep 17 00:00:00 2001
From: Philippe Lovis <philippe.lovis@inventage.com>
Date: Mon, 28 Aug 2017 16:28:39 +0200
Subject: [PATCH] Don't instantiate unnecessary exception for valid JSON

---
 lib/src/main/java/com/auth0/jwt/impl/JWTParser.java | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/src/main/java/com/auth0/jwt/impl/JWTParser.java b/lib/src/main/java/com/auth0/jwt/impl/JWTParser.java
index 1efb825e..45854785 100644
--- a/lib/src/main/java/com/auth0/jwt/impl/JWTParser.java
+++ b/lib/src/main/java/com/auth0/jwt/impl/JWTParser.java
@@ -49,14 +49,17 @@ static ObjectMapper getDefaultObjectMapper() {
 
     @SuppressWarnings("WeakerAccess")
     <T> T convertFromJSON(String json, Class<T> tClazz) throws JWTDecodeException {
-        JWTDecodeException exception = new JWTDecodeException(String.format("The string '%s' doesn't have a valid JSON format.", json));
         if (json == null) {
-            throw exception;
+            throw exceptionForInvalidJson(null);
         }
         try {
             return mapper.readValue(json, tClazz);
         } catch (IOException e) {
-            throw exception;
+            throw exceptionForInvalidJson(json);
         }
     }
+
+    private JWTDecodeException exceptionForInvalidJson(String json) {
+        return new JWTDecodeException(String.format("The string '%s' doesn't have a valid JSON format.", json));
+    }
 }