From 72e4ab4b004482fa709de9c4c951ae9485ff1ea3 Mon Sep 17 00:00:00 2001
From: Henri Yandell <bayard@apache.org>
Date: Sat, 9 Jan 2010 10:06:42 +0000
Subject: [PATCH] Synchronizing the COMMON Map so that getInstance doesn't miss
 a put from a subclass in another thread. LANG-494

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@897408 13f79535-47bb-0310-9956-ffa450edef68
---
 src/main/java/org/apache/commons/lang3/CharSet.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/apache/commons/lang3/CharSet.java b/src/main/java/org/apache/commons/lang3/CharSet.java
index 2dde55a9c..d1808bd95 100644
--- a/src/main/java/org/apache/commons/lang3/CharSet.java
+++ b/src/main/java/org/apache/commons/lang3/CharSet.java
@@ -17,6 +17,7 @@
 package org.apache.commons.lang3;
 
 import java.io.Serializable;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
@@ -75,10 +76,10 @@ public class CharSet implements Serializable {
 
     /**
      * A Map of the common cases used in the factory.
-     * Subclasses can add more common patterns if desired.
+     * Subclasses can add more common patterns if desired
      * @since 2.0
      */
-    protected static final Map<String, CharSet> COMMON = new HashMap<String, CharSet>();
+    protected static final Map<String, CharSet> COMMON = Collections.synchronizedMap(new HashMap<String, CharSet>());
     
     static {
         COMMON.put(null, EMPTY);