From 16589de9759a4e1b434d74167b9042b8659caf59 Mon Sep 17 00:00:00 2001
From: William Cheng <wing328hk@gmail.com>
Date: Mon, 23 Apr 2018 16:14:45 +0800
Subject: [PATCH] default collection format to csv according to the spec (#201)

---
 .../src/main/java/org/openapitools/codegen/DefaultCodegen.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index 87a89b5dfb..b09866db4a 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -2595,7 +2595,8 @@ public class DefaultCodegen implements CodegenConfig {
                 codegenParameter.items = codegenProperty.items;
             }
 
-            codegenParameter.collectionFormat = collectionFormat;
+            // default to csv
+            codegenParameter.collectionFormat = StringUtils.isEmpty(collectionFormat) ? "csv" : collectionFormat;
             if ("multi".equals(collectionFormat)) {
                 codegenParameter.isCollectionFormatMulti = true;
             }