From be9a9a3837fc69de7058d95db43850a46d3e9324 Mon Sep 17 00:00:00 2001
From: Mykola Yashchenko <vkont4@gmail.com>
Date: Mon, 31 Jul 2017 14:03:25 +0300
Subject: [PATCH] [Java] Jersey, Jersey2 and Resteasy clients do not support
 HTTP-HEAD (#6210)

---
 .../src/main/resources/Java/ApiClient.mustache               | 5 +++--
 .../main/resources/Java/libraries/jersey2/ApiClient.mustache | 4 +++-
 .../resources/Java/libraries/resteasy/ApiClient.mustache     | 4 +++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/modules/swagger-codegen/src/main/resources/Java/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/ApiClient.mustache
index d1336db1da4..718a7e57129 100644
--- a/modules/swagger-codegen/src/main/resources/Java/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/ApiClient.mustache
@@ -667,8 +667,9 @@ public class ApiClient {
       response = builder.type(contentType).delete(ClientResponse.class, serialize(body, contentType, formParams));
     } else if ("PATCH".equals(method)) {
       response = builder.type(contentType).header("X-HTTP-Method-Override", "PATCH").post(ClientResponse.class, serialize(body, contentType, formParams));
-    }
-    else {
+    } else if ("HEAD".equals(method)) {
+      response = builder.head();
+    } else {
       throw new ApiException(500, "unknown method type " + method);
     }
     return response;
diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
index 6dafe4a4987..4175739c37a 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
@@ -636,7 +636,7 @@ public class ApiClient {
    *
    * @param <T> Type
    * @param path The sub-path of the HTTP URL
-   * @param method The request method, one of "GET", "POST", "PUT", and "DELETE"
+   * @param method The request method, one of "GET", "POST", "PUT", "HEAD" and "DELETE"
    * @param queryParams The query parameters
    * @param body The request body object
    * @param headerParams The header parameters
@@ -697,6 +697,8 @@ public class ApiClient {
         response = invocationBuilder.delete();
       } else if ("PATCH".equals(method)) {
         response = invocationBuilder.method("PATCH", entity);
+      } else if ("HEAD".equals(method)) {
+        response = invocationBuilder.head();
       } else {
         throw new ApiException(500, "unknown method type " + method);
       }
diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache
index b41f31903b9..24953959b98 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache
@@ -561,7 +561,7 @@ public class ApiClient {
    * Invoke API by sending HTTP request with the given options.
    *
    * @param path The sub-path of the HTTP URL
-   * @param method The request method, one of "GET", "POST", "PUT", and "DELETE"
+   * @param method The request method, one of "GET", "POST", "PUT", "HEAD" and "DELETE"
    * @param queryParams The query parameters
    * @param body The request body object
    * @param headerParams The header parameters
@@ -619,6 +619,8 @@ public class ApiClient {
       response = invocationBuilder.delete();
     } else if ("PATCH".equals(method)) {
       response = invocationBuilder.header("X-HTTP-Method-Override", "PATCH").post(entity);
+    } else if ("HEAD".equals(method)) {
+      response = invocationBuilder.head();
     } else {
       throw new ApiException(500, "unknown method type " + method);
     }