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diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Substitution.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/Substitution.java
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+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+package org.apache.tools.ant.types;
+
+
+import org.apache.tools.ant.Project;
+
+/***
+ * A regular expression substitution datatype.  It is an expression
+ * that is meant to replace a regular expression.
+ *
+ * <pre>
+ *   &lt;substitution [ [id="id"] expression="expression" | refid="id" ]
+ *   /&gt;
+ * </pre>
+ *
+ * @see org.apache.oro.text.regex.Perl5Substitution
+ */
+public class Substitution extends DataType {
+    /** The name of this data type */
+    public static final String DATA_TYPE_NAME = "substitution";
+
+    private String expression;
+
+    /** Constructor for Substitution. */
+    public Substitution() {
+        this.expression = null;
+    }
+
+    /**
+     * Set the pattern string for this regular expression substitution.
+     * @param expression the regular expression to use
+     */
+    public void setExpression(String expression) {
+        this.expression = expression;
+    }
+
+    /***
+     * Gets the pattern string for this RegularExpression in the
+     * given project.
+     * @param p the project to look for the regular expression if this object is
+     *          a reference
+     * @return the pattern string
+     */
+    public String getExpression(Project p) {
+        if (isReference()) {
+            return getRef(p).getExpression(p);
+        }
+
+        return expression;
+    }
+
+    /***
+     * Get the RegularExpression this reference refers to in
+     * the given project.  Check for circular references too.
+     * @param p the project to look for the regular expression reference
+     * @return the resolved reference
+     */
+    public Substitution getRef(Project p) {
+        return (Substitution) getCheckedRef(p);
+    }
+}