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#ifndef Properties_H
#define Properties_H
#include <string>
#include <set>
#include <map>
#include <stdexcept>
#include <fstream>
#include <iterator>
#pragma warning( disable: 4290 )
template<char Delimiter='='>
class Property : public std::pair<std::string, std::string>
{
public:
Property(){}
Property(const std::pair<std::string, std::string> &p)
: std::pair<std::string, std::string>(p) {}
explicit Property(const std::string &line)
{
size_t pos = line.find(Delimiter);
if(pos != std::string::npos) {
first = line.substr(0, pos);
second = line.substr(pos+1, std::string::npos);
std::replace_if(second.begin(), second.end(), std::bind2nd(std::equal_to<char>(), '\t'), '\n');
}
}
Property(const std::string &name, const std::string &value)
: std::pair<std::string, std::string>(name, value){ }
~Property(){}
Property& operator=(const std::pair<std::string, std::string> &p)
{ std::pair<std::string, std::string>::operator=(p); }
const std::string& getName() const { return first; }
const std::string& getValue() const { return second; }
friend std::ostream& operator<<(std::ostream &os, const Property& p)
{
if(!p.getName().empty()) {
std::string value = p.getValue();
std::replace_if(value.begin(), value.end(), std::bind2nd(std::equal_to<char>(), '\n'), '\t');
os << p.getName() << Delimiter << value << std::endl;
}
return os;
}
friend std::istream& operator>>(std::istream &is, Property& p)
{
char buffer[2048];
is.getline(buffer, sizeof(buffer));
p = Property(buffer);
return is;
}
};
class Properties
{
private:
struct PropertyComperator
{
bool operator()(const Property<'='> &lhs, const Property<'='> &rhs) const
{ return lhs.getName() < rhs.getName(); }
};
typedef Property<'='> PropertyType;
typedef std::set<PropertyType , PropertyComperator> DatastoreType;
std::string mFilename;
DatastoreType mDatastore;
public:
Properties(const std::string &filename = "");
virtual ~Properties();
void load(const std::string &filename = "");
void dump(const std::string &filename = "");
std::string getProperty(const std::string &name) const throw(std::invalid_argument);
std::string getProperty(const std::string &name, const std::string &defaultValue) const throw();
void setProperty(const std::string &name, const std::string &value);
void removeProperty(const std::string &name);
std::map<std::string, std::string> asMap() const;
operator std::map<std::string, std::string> () const { return asMap(); }
private:
const DatastoreType& getDatastore() const;
DatastoreType& getDatastore();
template<class StreamType>
StreamType& openfile(StreamType &file, const std::string& filename)
{
std::string fn = filename.empty() ? mFilename : filename;
file.open(fn.c_str());
if(!file) {
throw std::runtime_error("could not open file " + fn);
}
return file;
}
};
class PropertiesManager : public Properties
{
public:
static PropertiesManager& instance();
private:
PropertiesManager(const std::string &file)
:Properties(file) {}
};
#endif
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