From 06160d55558dc586cc06f97f17f87a4036404244 Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Fri, 18 Jan 2013 16:41:50 +0100
Subject: [PATCH] [r=Peter.Gromov] tolerate null key for get and containsKey

---
 .../util/src/com/intellij/util/containers/RefHashMap.java   | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/platform/util/src/com/intellij/util/containers/RefHashMap.java b/platform/util/src/com/intellij/util/containers/RefHashMap.java
index cba8230bdd72..057b96604e60 100644
--- a/platform/util/src/com/intellij/util/containers/RefHashMap.java
+++ b/platform/util/src/com/intellij/util/containers/RefHashMap.java
@@ -185,7 +185,8 @@ abstract class RefHashMap<K, V> extends AbstractMap<K, V> implements Map<K, V> {
   }
 
   @Override
-  public boolean containsKey(@NotNull Object key) {
+  public boolean containsKey(Object key) {
+    if (key == null) return false;
     // optimization:
     myHardKeyInstance.set((K)key);
     boolean result = myMap.containsKey(myHardKeyInstance);
@@ -194,7 +195,8 @@ abstract class RefHashMap<K, V> extends AbstractMap<K, V> implements Map<K, V> {
   }
 
   @Override
-  public V get(@NotNull Object key) {
+  public V get(Object key) {
+    if (key == null) return null;
     myHardKeyInstance.set((K)key);
     V result = myMap.get(myHardKeyInstance);
     myHardKeyInstance.clear();