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diff --git a/source/mir/util/GeneratorExpressionFunctions.java b/source/mir/util/GeneratorExpressionFunctions.java
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+/*
+ * Copyright (C) 2001, 2002  The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with the com.oreilly.servlet library, any library
+ * licensed under the Apache Software License, The Sun (tm) Java Advanced
+ * Imaging library (JAI), The Sun JIMI library (or with modified versions of
+ * the above that use the same license as the above), and distribute linked
+ * combinations including the two.  You must obey the GNU General Public
+ * License in all respects for all of the code used other than the above
+ * mentioned libraries.  If you modify this file, you may extend this exception
+ * to your version of the file, but you are not obligated to do so.  If you do
+ * not wish to do so, delete this exception statement from your version.
+ */
+
+package mir.util;
+
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import mir.generator.Generator;\r
+import mir.generator.GeneratorExc;\r
+import mir.generator.GeneratorFailure;
+
+public class GeneratorExpressionFunctions {
+  private GeneratorExpressionFunctions() {
+  }
+
+  public static class evaluateExpressionFunction implements Generator.GeneratorFunction {
+    public Object perform(List aParameters) throws GeneratorExc, GeneratorFailure {
+      try {
+        if (aParameters.size()!=2)
+          throw new GeneratorExc("evaluateExpressionFunction <map> <expression>: 2 parameters expected");
+
+        Object parameter1=aParameters.get(0);
+
+        if (!(parameter1 instanceof Map))
+          throw new GeneratorExc("evaluateExpressionFunction <map> <expression>: first parameter must be a map");
+
+        return ParameterExpander.expandExpression((Map) parameter1, StringRoutines.interpretAsString(aParameters.get(1)));
+      }
+      catch (GeneratorExc e) {
+        throw e;
+      }
+      catch (Throwable t) {
+        throw new GeneratorFailure("encodeURIGeneratorFunction: " + t.getMessage(), t);
+      }
+    };
+  }
+
+
+
+}
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