devel/libmdw/trunk/libmdw/src/PropertiesManager.cpp

/***************************************************************************
 *   Copyright (C) 2010 by Jean-Baptiste Wons   *
 *   wonsjb@gmail.com   *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include<fstream>

#include "PropertiesManager.h"
#include "Error.h"

using namespace std;

namespace mdw
{
PropertiesManager * PropertiesManager::_instance;

PropertiesManager::PropertiesManager()
{
}


PropertiesManager::~PropertiesManager()
{
}

void PropertiesManager::initialise (const std::string &configFile)
{
    _instance = new PropertiesManager();
    _instance->init (configFile);
}
PropertiesManager &PropertiesManager::getInstance()
{
    return *_instance;
}

bool PropertiesManager::getBooleanProperty (const std::string &name)
{
    map<string, string>::iterator aIter = _stringValues.find (name);
    if (aIter == _stringValues.end())
    {
        ERROR ("Property " << name << " does not have a value");
    }
    string res = parse (aIter->second);
    return res == "true";
}
bool PropertiesManager::getBooleanProperty (const std::string &name, bool defaultValue)
{
    map<string, string>::iterator aIter = _stringValues.find (name);
    if (aIter == _stringValues.end())
    {
        return defaultValue;
    }
    string res = parse (aIter->second);
    return res == "true";
}

int PropertiesManager::getIntProperty (const std::string &name)
{
    map<string, string>::iterator aIter = _stringValues.find (name);
    if (aIter == _stringValues.end())
    {
        ERROR ("Property " << name << " does not have a value");
    }
    string res = parse (aIter->second);
    return atoi (res.c_str());
}
int PropertiesManager::getIntProperty (const std::string &name, int defaultValue)
{
    map<string, string>::iterator aIter = _stringValues.find (name);
    if (aIter == _stringValues.end())
    {
        return defaultValue;
    }
    string res = parse (aIter->second);
    return atoi (res.c_str());
}

std::string PropertiesManager::getStringProperty (const std::string &name)
{
    map<string, string>::iterator aIter = _stringValues.find (name);
    if (aIter == _stringValues.end())
    {
        ERROR ("Property " << name << " does not have a value");
    }
    return parse (aIter->second);
}
std::string PropertiesManager::getStringProperty (const std::string &name, const std::string &defaultValue)
{
    map<string, string>::iterator aIter = _stringValues.find (name);
    if (aIter == _stringValues.end())
    {
        return defaultValue;
    }
    return parse (aIter->second);
}

std::string PropertiesManager::parse (const std::string &value)
{
    size_t pos = value.find ("$(");
    if (pos == string::npos)
    {
        return value;
    }
    pos += 2;
    size_t current = pos;
    int depth = 1;
    while (current < value.size())
    {
        if (value[current] == '(')
        {
            ++depth;
        }
        else if (value[current] == ')')
        {
            --depth;
        }
        if (depth == 0)
        {
            break;
        }
        ++current;
    }
    if (current == value.size())
    {
        // hum, parse error, return the value
        return value;
    }
    string var = parse (value.substr (pos, current - pos));
    map<string, string>::iterator aIter = _stringValues.find (var);
    if (aIter == _stringValues.end())
    {
        ERROR ("Property " << var << " does not have a value");
    }
    return value.substr (0, pos - 2) + parse (aIter->second) + parse (value.substr (current + 1));
}

void PropertiesManager::init (const std::string &configFile)
{
    readFile (configFile);
}

void PropertiesManager::readFile (const std::string &configFile)
{
    ifstream aFile (configFile.c_str());
    string line;
    while (!aFile.eof())
    {
        getline (aFile, line);
        if (line.empty())
        {
            continue;
        }
        if (line[0] == '#')
        {
            continue;
        }
        if (line.size() > 9 && line.substr (0, 9) == ".include ")
        {
            readFile (parse (line.substr (9)));
        }
        size_t pos = line.find (" = ");
        if (pos != string::npos)
        {
            _stringValues[line.substr (0, pos) ] = line.substr (pos + 3);
        }
        else
        {
            pos = line.find ("=");
            _stringValues[line.substr (0, pos) ] = line.substr (pos + 1);
        }
    }
}

}

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