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diff --git a/TAO/orbsvcs/orbsvcs/Log/Log_Constraint_Interpreter.h b/TAO/orbsvcs/orbsvcs/Log/Log_Constraint_Interpreter.h
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+// -*- C++ -*-
+
+//=============================================================================
+/**
+ * @file Log_Constraint_Interpreter.h
+ *
+ * $Id$
+ *
+ *
+ *
+ *
+ * @author Pradeep Gore <pradeep@cs.wustl.edu>
+ * @author D A Hanvey <d.hanvey@qub.ac.uk>
+ *
+ */
+//=============================================================================
+
+#ifndef TAO_LOG_CONSTRAINT_INTERPRETER_H
+#define TAO_LOG_CONSTRAINT_INTERPRETER_H
+
+#include /**/ "ace/pre.h"
+#include "orbsvcs/ETCL/ETCL_Interpreter.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "orbsvcs/ETCL/ETCL_Constraint.h"
+#include "orbsvcs/DsLogAdminC.h"
+#include "orbsvcs/Log/log_serv_export.h"
+
+TAO_BEGIN_VERSIONED_NAMESPACE_DECL
+
+class TAO_Log_Constraint_Visitor;
+
+/**
+ * @class TAO_Log_Constraint_Interpreter
+ *
+ * @brief "ETCL" Interpreter for the Log queries.
+ */
+class TAO_Log_Serv_Export TAO_Log_Constraint_Interpreter :
+ public TAO_ETCL_Interpreter
+{
+public:
+
+ // = Initialization and termination methods.
+
+ /**
+ * This constructor builds an expression tree representing the
+ * constraint specified in <constraints>, and throws an Illegal
+ * Constraint exception if the constraint given has syntax errors or
+ * semantic errors, such as mismatched types.
+ */
+ TAO_Log_Constraint_Interpreter (const char* constraints);
+
+ /// Destructor.
+ ~TAO_Log_Constraint_Interpreter (void);
+
+ /// Returns true if the constraint is evaluated successfully by
+ /// the evaluator.
+ CORBA::Boolean evaluate (TAO_Log_Constraint_Visitor &evaluator);
+};
+
+TAO_END_VERSIONED_NAMESPACE_DECL
+
+#include /**/ "ace/post.h"
+#endif /* TAO_LOG_CONSTRAINT_INTERPRETER_H */