icinga2/lib/config/expression.h

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef EXPRESSION_H
#define EXPRESSION_H
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#include "config/i2-config.h"
#include "config/debuginfo.h"
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#include "base/dictionary.h"
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#include <iostream>
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#include <vector>
#include <set>
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namespace icinga
{
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/**
* The operator in a configuration expression.
*
* @ingroup config
*/
enum ExpressionOperator
{
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OperatorExecute,
OperatorSet,
OperatorPlus,
OperatorMinus,
OperatorMultiply,
OperatorDivide
};
class ExpressionList;
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/**
* A configuration expression.
*
* @ingroup config
*/
struct I2_CONFIG_API Expression
{
public:
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Expression(const String& key, ExpressionOperator op, const Value& value,
const DebugInfo& debuginfo);
void Execute(const Dictionary::Ptr& dictionary) const;
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void Dump(std::ostream& fp, int indent = 0) const;
void ExtractPath(const std::vector<String>& path, const shared_ptr<ExpressionList>& result) const;
void ExtractFiltered(const std::set<String, string_iless>& keys, const shared_ptr<ExpressionList>& result) const;
private:
String m_Key;
ExpressionOperator m_Operator;
Value m_Value;
DebugInfo m_DebugInfo;
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static void DumpValue(std::ostream& fp, int indent, const Value& value, bool inlineDict = false);
};
}
#endif /* EXPRESSION_H */