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diff --git a/src/java/net/sf/antcontrib/property/PropertyCopy.java b/src/java/net/sf/antcontrib/property/PropertyCopy.java
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+/*
+ * Copyright (c) 2001-2004 Ant-Contrib project.  All rights reserved.
+ *
+ * Licensed 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 net.sf.antcontrib.property;
+
+import org.apache.tools.ant.BuildException;
+
+/***
+ * Task definition for the propertycopy task, which copies the value of a
+ * named property to another property.  This is useful when you need to
+ * plug in the value of another property in order to get a property name
+ * and then want to get the value of that property name.
+ *
+ * <pre>
+ * Usage:
+ *
+ *   Task declaration in the project:
+ *   <code>
+ *     &lt;taskdef name="propertycopy" classname="net.sf.antcontrib.property.PropertyCopy" /&gt;
+ *   </code>
+ *
+ *   Call Syntax:
+ *   <code>
+ *     &lt;propertycopy name="propname" from="copyfrom" (silent="true|false")? /&gt;
+ *   </code>
+ *
+ *   Attributes:
+ *     name      --&gt; The name of the property you wish to set with the value
+ *     from      --&gt; The name of the property you wish to copy the value from
+ *     silent    --&gt; Do you want to suppress the error if the "from" property
+ *                   does not exist, and just not set the property "name".  Default
+ *                   is false.
+ *
+ *   Example:
+ *     &lt;property name="org" value="MyOrg" /&gt;
+ *     &lt;property name="org.MyOrg.DisplayName" value="My Organiziation" /&gt;
+ *     &lt;propertycopy name="displayName" from="org.${org}.DisplayName" /&gt;
+ *     &lt;echo message="${displayName}" /&gt;
+ * </pre>
+ *
+ * @author <a href="mailto:[email protected]">Matthew Inger</a>
+ */
+public class PropertyCopy
+        extends AbstractPropertySetterTask
+{
+    private String from;
+    private boolean silent;
+
+    /***
+     * Default Constructor
+     */
+    public PropertyCopy()
+    {
+        super();
+        this.from = null;
+        this.silent = false;
+    }
+
+    public void setName(String name)
+    {
+        setProperty(name);
+    }
+
+    public void setFrom(String from)
+    {
+        this.from = from;
+    }
+
+    public void setSilent(boolean silent)
+    {
+        this.silent = silent;
+    }
+
+    protected void validate()
+    {
+        super.validate();
+        if (from == null)
+            throw new BuildException("Missing the 'from' attribute.");
+    }
+
+    public void execute()
+        throws BuildException
+    {
+        validate();
+
+        String value = getProject().getProperty(from);
+
+        if (value == null && ! silent)
+            throw new BuildException("Property '" + from + "' is not defined.");
+
+        if (value != null)
+            setPropertyValue(value);
+    }
+
+}
+
+