From 4ecc44cc495a090038ffffdceb4fe03680e5eb2f Mon Sep 17 00:00:00 2001
From: "Nicolas NESMON (NicoNes)" <nicolas.nesmon@gmail.com>
Date: Tue, 10 Aug 2021 14:18:54 -0400
Subject: [PATCH] Introduce Response.isClosed() method with default impl.

Signed-off-by: Nicolas NESMON (NicoNes) <nicolas.nesmon@gmail.com>
---
 .../main/java/jakarta/ws/rs/core/Response.java   | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java b/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java
index 82e85d704..5d3c1b987 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/core/Response.java
@@ -463,6 +463,22 @@ public MultivaluedMap<String, Object> getHeaders() {
      */
     public abstract String getHeaderString(String name);
 
+    /**
+     * Check if the response is closed. The method returns {@code true} if the response is closed,
+     * returns {@code false} otherwise.
+     *
+     * @return {@code true} if the response has been {@link #close() closed}, {@code false} otherwise.
+     * @since 3.1
+     */
+    public boolean isClosed() {
+        try {
+            hasEntity();
+            return false;
+        } catch (IllegalStateException ignored) {
+            return true;
+        }
+    }
+
     /**
      * Create a new ResponseBuilder by performing a shallow copy of an existing Response.
      * <p>