From 0c9ce8cd2164e864aa18d52fa7ec83119e67e265 Mon Sep 17 00:00:00 2001
From: Matthew Jason Benson <mbenson@apache.org>
Date: Thu, 10 May 2007 22:35:27 +0000
Subject: [PATCH] exclusivity

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@537023 13f79535-47bb-0310-9956-ffa450edef68
---
 .../apache/tools/ant/filters/StripLineComments.java    |  3 +++
 src/tests/antunit/filters/striplinecomments-test.xml   | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/src/main/org/apache/tools/ant/filters/StripLineComments.java b/src/main/org/apache/tools/ant/filters/StripLineComments.java
index 84ac8904f..54888496d 100644
--- a/src/main/org/apache/tools/ant/filters/StripLineComments.java
+++ b/src/main/org/apache/tools/ant/filters/StripLineComments.java
@@ -208,6 +208,9 @@ public final class StripLineComments
          * Must not be <code>null</code>.
          */
         public final void setValue(String comment) {
+            if (value != null) {
+                throw new IllegalStateException("Comment value already set.");
+            }
             value = comment;
         }
 
diff --git a/src/tests/antunit/filters/striplinecomments-test.xml b/src/tests/antunit/filters/striplinecomments-test.xml
index a1cafee6f..3bc518f00 100644
--- a/src/tests/antunit/filters/striplinecomments-test.xml
+++ b/src/tests/antunit/filters/striplinecomments-test.xml
@@ -55,4 +55,14 @@ REMark
     </test>
   </target>
 
+  <target name="testExclusivity">
+    <au:expectfailure>
+      <filterchain>
+        <striplinecomments>
+          <comment value="#">#"</comment>
+        </striplinecomments>
+      </filterchain>
+    </au:expectfailure>
+  </target>
+
 </project>