diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/jsp/Jasper41Mangler.java b/src/main/org/apache/tools/ant/taskdefs/optional/jsp/Jasper41Mangler.java
new file mode 100644
index 000000000..ccc1ab89f
--- /dev/null
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/jsp/Jasper41Mangler.java
@@ -0,0 +1,132 @@
+/*
+ *  The Apache Software License, Version 1.1
+ *
+ *  Copyright (c) 2003 The Apache Software Foundation.  All rights
+ *  reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *  notice, this list of conditions and the following disclaimer.
+ *
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *  notice, this list of conditions and the following disclaimer in
+ *  the documentation and/or other materials provided with the
+ *  distribution.
+ *
+ *  3. The end-user documentation included with the redistribution, if
+ *  any, must include the following acknowlegement:
+ *  "This product includes software developed by the
+ *  Apache Software Foundation (http://www.apache.org/)."
+ *  Alternately, this acknowlegement may appear in the software itself,
+ *  if and wherever such third-party acknowlegements normally appear.
+ *
+ *  4. The names "The Jakarta Project", "Ant", and "Apache Software
+ *  Foundation" must not be used to endorse or promote products derived
+ *  from this software without prior written permission. For written
+ *  permission, please contact apache@apache.org.
+ *
+ *  5. Products derived from this software may not be called "Apache"
+ *  nor may "Apache" appear in their names without prior written
+ *  permission of the Apache Group.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ *  SUCH DAMAGE.
+ *  ====================================================================
+ *
+ *  This software consists of voluntary contributions made by many
+ *  individuals on behalf of the Apache Software Foundation.  For more
+ *  information on the Apache Software Foundation, please see
+ *  <http://www.apache.org/>.
+ */
+
+
+package org.apache.tools.ant.taskdefs.optional.jsp;
+
+import java.io.File;
+
+/**
+ * this class implements the name mangling rules of the jasper in tomcat4.1.x
+ * which is likely to remain for some time
+ * @see org.apache.jasper.JspCompilationContext
+ * @author Anil K. Vijendran
+ * @author Harish Prabandham
+ * @author Pierre Delisle
+ * @author Costin Manolache
+ * @author Steve Loughran (copied from JspCompilationContext)
+ */
+public class Jasper41Mangler implements JspMangler {
+
+
+    /**
+     * map from a jsp file to a java filename; does not do packages
+     *
+     * @param jspFile file
+     * @return java filename
+     */
+    public String mapJspToJavaName(File jspFile) {
+        String jspUri = jspFile.getAbsolutePath();
+        int start = jspUri.lastIndexOf(File.separatorChar) + 1;
+        int end = jspUri.length();
+        StringBuffer modifiedClassName;
+        modifiedClassName = new StringBuffer(jspUri.length() - start);
+        if (!Character.isJavaIdentifierStart(jspUri.charAt(start)) ||
+                jspUri.charAt(start) == '_') {
+            // If the first char is not a start of Java identifier or is _
+            // prepend a '_'.
+            modifiedClassName.append('_');
+        }
+        for (int i = start; i < end; i++) {
+            char ch = jspUri.charAt(i);
+            if (Character.isJavaIdentifierPart(ch)) {
+                modifiedClassName.append(ch);
+            } else if (ch == '.') {
+                modifiedClassName.append('_');
+            } else {
+                modifiedClassName.append(mangleChar(ch));
+            }
+        }
+        return modifiedClassName.toString();
+    }
+
+    /**
+     * Mangle the specified character to create a legal Java class name.
+     */
+    private static final String mangleChar(char ch) {
+
+        String s = Integer.toHexString(ch);
+        int nzeros = 5 - s.length();
+        char[] result = new char[6];
+        result[0] = '_';
+        for (int i = 1; i <= nzeros; i++) {
+            result[i] = '0';
+        }
+        for (int i = nzeros + 1, j = 0; i < 6; i++, j++) {
+            result[i] = s.charAt(j);
+        }
+        return new String(result);
+    }
+
+
+    /**
+     * taking in the substring representing the path relative to the source dir
+     * return a new string representing the destination path
+     * @todo
+     */
+    public String mapPath(String path) {
+        return null;
+    }
+
+}