From fdd330a116c55a89b1320f1c5e0c7dec242a0ec7 Mon Sep 17 00:00:00 2001
From: "Richard G. Curtis" <curtisr7@apache.org>
Date: Mon, 21 Sep 2009 18:51:23 +0000
Subject: [PATCH] OPENJPA-1172 - Committing changes to trunk. Patch submitted
 by Rick Curtis

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@817370 13f79535-47bb-0310-9956-ffa450edef68
---
 .../main/java/org/apache/openjpa/jdbc/meta/ClassMapping.java | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/ClassMapping.java b/openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/ClassMapping.java
index 9d2e2b65a..484f17da0 100644
--- a/openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/ClassMapping.java
+++ b/openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/ClassMapping.java
@@ -22,13 +22,12 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
 
 import org.apache.openjpa.enhance.PersistenceCapable;
 import org.apache.openjpa.enhance.Reflection;
@@ -87,7 +86,7 @@ public class ClassMapping
     private ClassMapping[] _assignMaps = null;
 
     // maps columns to joinables
-    private final Map _joinables = Collections.synchronizedMap(new HashMap());
+    private final Map _joinables = new ConcurrentHashMap();
 
     /**
      * Constructor. Supply described type and owning repository.