Source: ../../policy/common/element_base.hh
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// vim:set sts=4 ts=8:
// Copyright (c) 2001-2005 International Computer Science Institute
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software")
// to deal in the Software without restriction, subject to the conditions
// listed in the XORP LICENSE file. These conditions include: you must
// preserve this copyright notice, and you cannot mention the copyright
// holders in advertising related to the Software without their permission.
// The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
// notice is a summary of the XORP LICENSE file; the license in that file is
// legally binding.
// $XORP: xorp/policy/common/element_base.hh,v 1.2 2005/03/25 02:54:16 pavlin Exp $
#ifndef __POLICY_COMMON_ELEMENT_BASE_HH__
#define __POLICY_COMMON_ELEMENT_BASE_HH__
#include <string>
/**
* @short Basic object type used by policy engine.
*
* This element hierarchy is similar to XrlAtom's but exclusive to policy
* components.
*/
class Element {
public:
/**
* Every element has a type which is representable by a string. This type is
* later used by the policy semantic checker to ensure validity of policy
* statements.
*
* @param type unique string representation of element type.
*/
Element(const std::string& type) : _type(type) {}
virtual ~Element() {}
/**
* Every element must be representable by a string. This is a requirement
* to enable the policy manager to send elements to the backend filters via
* XRL calls for example.
*
* @return string representation of the element.
*/
virtual std::string str() const = 0;
/**
* @return string representation of element type.
*/
const std::string& type() const { return _type; }
private:
/**
* Type must be unique as it is used by dispatcher for determining the
* correct callback to execute.
*/
const std::string _type;
};
#endif // __POLICY_COMMON_ELEMENT_BASE_HH__
Generated by: pavlin on possum.icir.org on Wed Apr 13 21:53:12 2005, using kdoc $.