need to discuss jdk support

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/ognl/trunk@1519843 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/ognl/ASTMap.java b/src/main/java/org/apache/commons/ognl/ASTMap.java
index 5a68305..3322277 100644
--- a/src/main/java/org/apache/commons/ognl/ASTMap.java
+++ b/src/main/java/org/apache/commons/ognl/ASTMap.java
@@ -127,6 +127,7 @@
         }
 
         /* Try to get LinkedHashMap; if older JDK than 1.4 use HashMap */
+        // TODO: support for JDK < 1.4?
         try
         {
             defaultMapClass = OgnlRuntime.classForName( context, "java.util.LinkedHashMap" );