abstractconfiguration.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// AbstractConfiguration.cpp
//
// $Id: //poco/Main/Util/src/AbstractConfiguration.cpp#1 $
//
// 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
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#include "Util/AbstractConfiguration.h"
#include "Util/ConfigurationView.h"
#include "Foundation/Exception.h"
#include "Foundation/NumberParser.h"
#include "Foundation/NumberFormatter.h"
#include "Foundation/String.h"


using Foundation::FastMutex;
using Foundation::NotFoundException;
using Foundation::SyntaxException;
using Foundation::CircularReferenceException;
using Foundation::NumberParser;
using Foundation::NumberFormatter;
using Foundation::icompare;


Util_BEGIN


AbstractConfiguration::AbstractConfiguration(): _depth(0)
{
}


AbstractConfiguration::~AbstractConfiguration()
{
}


bool AbstractConfiguration::hasProperty(const std::string& key) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	return getRaw(key, value);
}


bool AbstractConfiguration::hasOption(const std::string& key) const
{
	return hasProperty(key);
}

	
std::string AbstractConfiguration::getString(const std::string& key) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return internalExpand(value);
	else
		throw NotFoundException(key);
}

	
std::string AbstractConfiguration::getString(const std::string& key, const std::string& defaultValue) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return internalExpand(value);
	else
		return defaultValue;
}


std::string AbstractConfiguration::getRawString(const std::string& key) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return value;
	else
		throw NotFoundException(key);
}

	
std::string AbstractConfiguration::getRawString(const std::string& key, const std::string& defaultValue) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return value;
	else
		return defaultValue;
}

	
int AbstractConfiguration::getInt(const std::string& key) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return parseInt(internalExpand(value));
	else
		throw NotFoundException(key);
}

	
int AbstractConfiguration::getInt(const std::string& key, int defaultValue) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return parseInt(internalExpand(value));
	else
		return defaultValue;
}


double AbstractConfiguration::getDouble(const std::string& key) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return NumberParser::parseFloat(internalExpand(value));
	else
		throw NotFoundException(key);
}

	
double AbstractConfiguration::getDouble(const std::string& key, double defaultValue) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return NumberParser::parseFloat(internalExpand(value));
	else
		return defaultValue;
}


bool AbstractConfiguration::getBool(const std::string& key) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return parseBool(internalExpand(value));
	else
		throw NotFoundException(key);
}


bool AbstractConfiguration::getBool(const std::string& key, bool defaultValue) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string value;
	if (getRaw(key, value))
		return parseBool(internalExpand(value));
	else
		return defaultValue;
}


void AbstractConfiguration::setString(const std::string& key, const std::string& value)
{
	FastMutex::ScopedLock lock(_mutex);

	setRaw(key, value);
}

	
void AbstractConfiguration::setInt(const std::string& key, int value)
{
	FastMutex::ScopedLock lock(_mutex);

	setRaw(key, NumberFormatter::format(value));
}


void AbstractConfiguration::setDouble(const std::string& key, double value)
{
	FastMutex::ScopedLock lock(_mutex);

	setRaw(key, NumberFormatter::format(value));
}


void AbstractConfiguration::setBool(const std::string& key, bool value)
{
	FastMutex::ScopedLock lock(_mutex);

	setRaw(key, value ? "true" : "false");
}


void AbstractConfiguration::keys(Keys& range) const
{
	FastMutex::ScopedLock lock(_mutex);

	std::string key;
	range.clear();
	enumerate(key, range);
}


void AbstractConfiguration::keys(const std::string& key, Keys& range) const
{
	FastMutex::ScopedLock lock(_mutex);

	range.clear();
	enumerate(key, range);
}


const AbstractConfiguration* AbstractConfiguration::createView(const std::string& prefix) const
{
	return new ConfigurationView(prefix, const_cast<AbstractConfiguration*>(this));
}


AbstractConfiguration* AbstractConfiguration::createView(const std::string& prefix)
{
	return new ConfigurationView(prefix, this);
}


namespace
{
	class AutoCounter
	{
	public:
		AutoCounter(int& count): _count(count)
		{
			++_count;
		}
		
		~AutoCounter()
		{
			--_count;
		}
		
	private:
		int& _count;
	};
}


std::string AbstractConfiguration::expand(const std::string& value) const
{
	FastMutex::ScopedLock lock(_mutex);

	return internalExpand(value);
}


std::string AbstractConfiguration::internalExpand(const std::string& value) const
{
	AutoCounter counter(_depth);
	if (_depth > 10) throw CircularReferenceException("Too many property references encountered");
	return uncheckedExpand(value);
}


std::string AbstractConfiguration::uncheckedExpand(const std::string& value) const
{
	std::string result;
	std::string::const_iterator it  = value.begin();
	std::string::const_iterator end = value.end();
	while (it != end)
	{
		if (*it == '$')
		{
			++it;
			if (it != end && *it == '{')
			{
				++it;
				std::string prop;
				while (it != end && *it != '}') prop += *it++;
				if (it != end) ++it;
				std::string value;
				if (getRaw(prop, value))
				{
					result.append(internalExpand(value));
				}
				else
				{
					result.append("${");
					result.append(prop);
					result.append("}");
				}
			}
			else result += *it++;
		}
		else result += *it++;
	}
	return result;
}


int AbstractConfiguration::parseInt(const std::string& value)
{
	if (value.compare(0, 2, "0x") == 0)
		return NumberParser::parseHex(value.substr(2));
	else
		return NumberParser::parse(value);
}


bool AbstractConfiguration::parseBool(const std::string& value)
{
	int n;
	if (NumberParser::tryParse(value, n))
		return n != 0;
	else if (icompare(value, "true") == 0)
		return true;
	else if (icompare(value, "yes") == 0)
		return true;
	else if (icompare(value, "on") == 0)
		return true;
	else if (icompare(value, "false") == 0)
		return false;
	else if (icompare(value, "no") == 0)
		return false;
	else if (icompare(value, "off") == 0)
		return false;
	else 
		throw SyntaxException("Cannot convert to boolean", value);
}


Util_END