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diff --git a/ACE/ACEXML/common/Env.h b/ACE/ACEXML/common/Env.h
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+++ b/ACE/ACEXML/common/Env.h
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+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file    Env.h
+ *
+ *  $Id$
+ *
+ *  @author Nanbor Wang <nanbor@cs.wustl.edu>
+ */
+//=============================================================================
+
+#ifndef _ACEXML_ENV_H_
+#define _ACEXML_ENV_H_
+
+#include /**/ "ace/pre.h"
+#include "ACEXML/common/ACEXML_Export.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+#pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ACEXML/common/XML_Macros.h"
+#include "ACEXML/common/Exception.h"
+
+/**
+ * @class ACEXML_Env Env.h "ACEXML/common/Env.h"
+ *
+ * @brief ACEXML_Env
+ *
+ * ACEXML_Env is modeled after CORBA_Environment class. It provides a place
+ * holder for callees to propagate exceptions back to callers. ACEXML does
+ * not support native exceptions at this moment.
+ *
+ * @sa ACEXML_Exception
+ */
+class ACEXML_Export ACEXML_Env
+{
+public:
+  /// Default constructor.
+  ACEXML_Env (void);
+
+  /// Copy constructor.
+  ACEXML_Env (const ACEXML_Env& ACEXML_TRY_ENV);
+
+  /// Assignment
+  ACEXML_Env& operator= (const ACEXML_Env& ACEXML_TRY_ENV);
+
+  /// Destructor.
+  ~ACEXML_Env (void);
+
+  /// Return the contained exception.
+  ACEXML_Exception *exception (void) const;
+
+  /// Set the contained exception to @arg ex
+  void exception (ACEXML_Exception* ex);
+
+  /// Clear the exception and reset the evnrionment.
+  void clear (void);
+
+private:
+  /// Place holder for exception (if one occurs.)
+  ACEXML_Exception *exception_;
+};
+
+#if defined (__ACEXML_INLINE__)
+# include "ACEXML/common/Env.inl"
+#endif /* __ACEXML_INLINE__ */
+
+#include /**/ "ace/post.h"
+
+#endif /* _ACEXML_ENV_H_ */