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diff --git a/java/gov/nist/javax/sip/stack/StackMessageFactory.java b/java/gov/nist/javax/sip/stack/StackMessageFactory.java
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+/*
+* Conditions Of Use
+*
+* This software was developed by employees of the National Institute of
+* Standards and Technology (NIST), an agency of the Federal Government.
+* Pursuant to title 15 Untied States Code Section 105, works of NIST
+* employees are not subject to copyright protection in the United States
+* and are considered to be in the public domain.  As a result, a formal
+* license is not needed to use the software.
+*
+* This software is provided by NIST as a service and is expressly
+* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
+* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
+* AND DATA ACCURACY.  NIST does not warrant or make any representations
+* regarding the use of the software or the results thereof, including but
+* not limited to the correctness, accuracy, reliability or usefulness of
+* the software.
+*
+* Permission to use this software is contingent upon your acceptance
+* of the terms of this agreement
+*
+* .
+*
+*/
+/*******************************************************************************
+* Product of NIST/ITL Advanced Networking Technologies Division (ANTD).        *
+*******************************************************************************/
+package gov.nist.javax.sip.stack;
+import gov.nist.javax.sip.message.*;
+
+/**
+ * An interface for generating new requests and responses. This is implemented
+ * by the application and called by the stack for processing requests
+ * and responses. When a Request comes in off the wire, the stack calls
+ * newSIPServerRequest which is then responsible for processing the request.
+ * When a response comes off the wire, the stack calls newSIPServerResponse
+ * to process the response.
+ *
+ * @version 1.2 $Revision: 1.5 $ $Date: 2009/07/17 18:58:15 $
+ *
+ * @author M. Ranganathan   <br/>
+ *
+ *
+ *
+ */
+public interface StackMessageFactory {
+    /**
+     * Make a new SIPServerResponse given a SIPRequest and a message
+     * channel.
+     *
+     * @param sipRequest is the incoming request.
+     * @param msgChan is the message channel on which this request was
+     *  received.
+     */
+    public ServerRequestInterface newSIPServerRequest(
+        SIPRequest sipRequest,
+        MessageChannel msgChan);
+
+    /**
+     * Generate a new server response for the stack.
+     *
+     * @param sipResponse is the incoming response.
+     * @param msgChan is the message channel on which the response was
+     * received.
+     */
+    public ServerResponseInterface newSIPServerResponse(
+        SIPResponse sipResponse,
+        MessageChannel msgChan);
+}