layeredconfiguration.h

来自「This software aims to create an applet a」· C头文件 代码 · 共 111 行

//
// LayeredConfiguration.h
//
// $Id: //poco/Main/Util/include/Util/LayeredConfiguration.h#1 $
//
// Definition of the LayeredConfiguration class.
//
// Copyright (c) 2004-2005, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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//


#ifndef Util_LayeredConfiguration_INCLUDED
#define Util_LayeredConfiguration_INCLUDED


#ifndef Util_Util_INCLUDED
#include "Util/Util.h"
#endif
#ifndef Util_AbstractConfiguration_INCLUDED
#include "Util/AbstractConfiguration.h"
#endif
#ifndef Foundation_AutoPtr_INCLUDED
#include "Foundation/AutoPtr.h"
#endif
#ifndef STD_VECTOR_INCLUDED
#include <vector>
#define STD_VECTOR_INCLUDED
#endif


Util_BEGIN


class Util_API LayeredConfiguration: public AbstractConfiguration
	/// A LayeredConfiguration consists of a number of AbstractConfigurations.
	///
	/// When reading a configuration property in a LayeredConfiguration,
	/// all added configurations are searched, from the first added to the last added.
	///
	/// When setting a property, the property is always written to the last configuration
	/// added. If no configurations have been added to the LayeredConfiguration, and an
	/// attempt is made to set a property, a RuntimeException is thrown.
{
public:
	LayeredConfiguration();
		/// Creates the LayeredConfiguration.
		
	void add(AbstractConfiguration* pConfig);
		/// Adds a configuration to the back of the LayeredConfiguration.

	void addFront(AbstractConfiguration* pConfig);
		/// Adds a configuration to the front of the LayeredConfiguration.

protected:
	bool getRaw(const std::string& key, std::string& value) const;
	void setRaw(const std::string& key, const std::string& value);
	void enumerate(const std::string& key, Keys& range) const;
	~LayeredConfiguration();

private:
	LayeredConfiguration(const LayeredConfiguration&);
	LayeredConfiguration& operator = (const LayeredConfiguration&);

	typedef Foundation::AutoPtr<AbstractConfiguration> ConfigPtr;
	typedef std::vector<ConfigPtr> ConfigVec;
	
	ConfigVec _configs;
};


Util_END


#endif // Util_LayeredConfiguration_INCLUDED