From 54bf37007959065d5a2c3b7a9d5062f9c682dc4c Mon Sep 17 00:00:00 2001
From: Viktor Klang <viktor.klang@oracle.com>
Date: Fri, 14 Apr 2023 09:16:16 +0000
Subject: [PATCH] 8170945: Collectors$Partition should override more Map
 methods

Reviewed-by: smarks
---
 .../classes/java/util/stream/Collectors.java  | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/java.base/share/classes/java/util/stream/Collectors.java b/src/java.base/share/classes/java/util/stream/Collectors.java
index db2169e5a10..54d1d4acd73 100644
--- a/src/java.base/share/classes/java/util/stream/Collectors.java
+++ b/src/java.base/share/classes/java/util/stream/Collectors.java
@@ -1972,6 +1972,35 @@ public final class Collectors {
             this.forFalse = forFalse;
         }
 
+        @Override
+        public int size() {
+            return 2;
+        }
+
+        @Override
+        public boolean isEmpty() {
+            return false;
+        }
+
+        @Override
+        public T get(Object key) {
+            if (key instanceof Boolean b) {
+                return b ? forTrue : forFalse;
+            } else {
+                return null;
+            }
+        }
+
+        @Override
+        public boolean containsKey(Object key) {
+            return key instanceof Boolean;
+        }
+
+        @Override
+        public boolean containsValue(Object value) {
+            return Objects.equals(value, forTrue) || Objects.equals(value, forFalse);
+        }
+
         @Override
         public Set<Map.Entry<Boolean, T>> entrySet() {
             return new AbstractSet<>() {