From f2c3aaca6eef27d20db8d02b767f7d4e6b589e0f Mon Sep 17 00:00:00 2001
From: raffael <raffael@casagrande.ch>
Date: Wed, 30 Aug 2017 12:51:45 +0200
Subject: [PATCH] Retrofit2: Return ResponseBody if response if file.

Until now
--------------------
If a swagger endpoint returned a file (e.g. an image), then the Retrofit2
template has choosen the return type java.io.File. However, retrofit cannot
deal with this and throws a com.google.gson.stream.MalformedJsonException.

New:
-------------------
If a swagger endpoint returns a file, then the corresponding Retrofit2 endpoint
will return a okhttp3.ResponseBody which can be used to retrieve the file.
---
 .../src/main/resources/Java/libraries/retrofit2/api.mustache   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/api.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/api.mustache
index 36d4a5c55a9..bee45765669 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/api.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/api.mustache
@@ -14,6 +14,7 @@ import retrofit2.Call;
 import retrofit2.http.*;
 
 import okhttp3.RequestBody;
+import okhttp3.ResponseBody;
 
 {{#imports}}import {{import}};
 {{/imports}}
@@ -60,7 +61,7 @@ public interface {{classname}} {
   {{/prioritizedContentTypes}}
   {{/formParams}}  
   @{{httpMethod}}("{{{path}}}")
-  {{^usePlay24WS}}{{^doNotUseRx}}Observable{{/doNotUseRx}}{{#doNotUseRx}}Call{{/doNotUseRx}}{{/usePlay24WS}}{{#usePlay24WS}}F.Promise<Response{{/usePlay24WS}}<{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}Object{{/returnType}}>{{#usePlay24WS}}>{{/usePlay24WS}} {{operationId}}({{^allParams}});{{/allParams}}
+  {{^usePlay24WS}}{{^doNotUseRx}}Observable{{/doNotUseRx}}{{#doNotUseRx}}Call{{/doNotUseRx}}{{/usePlay24WS}}{{#usePlay24WS}}F.Promise<Response{{/usePlay24WS}}<{{#isResponseFile}}ResponseBody{{/isResponseFile}}{{^isResponseFile}}{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}Object{{/returnType}}{{/isResponseFile}}>{{#usePlay24WS}}>{{/usePlay24WS}} {{operationId}}({{^allParams}});{{/allParams}}
     {{#allParams}}{{>libraries/retrofit2/queryParams}}{{>libraries/retrofit2/pathParams}}{{>libraries/retrofit2/headerParams}}{{>libraries/retrofit2/bodyParams}}{{>libraries/retrofit2/formParams}}{{#hasMore}}, {{/hasMore}}{{^hasMore}}
   );{{/hasMore}}{{/allParams}}