/*
 * namepool.h
 *
 *  Created on: Jul 14, 2012
 *      Author: gregor
 */

#ifndef GLTB_NAMEPOOL_H_
#define GLTB_NAMEPOOL_H_

#include <set>
#include <sstream>
#include <string>

#include "GLTB/exception.h"

namespace gltb {
	template<typename stringtype>
	class NamePoolBase {
	public:
		bool isNameUnique(stringtype name) {
			if(names.find(name)!=names.end()) {
				return false;
			}
			return true;
		}

		stringtype makeNameUnique(stringtype name) {
			if(isNameUnique(name)) {
				return name;
			}

			stringtype newName;
			int counter=1;
			do {
				std::basic_ostringstream<typename stringtype::value_type> newNameBuffer;
				newNameBuffer << name << counter;
				newName=newNameBuffer.str();
			} while(!isNameUnique(newName));

			return newName;
		}

		stringtype insertName(stringtype name, bool makeUnique=false) {
			if(!isNameUnique(name)) {
				if(!makeUnique) {
					throw Exception("name is not unique and cannot be inserted into pool","gltb::NamePool::insertName()");
				} else {
					name=makeNameUnique(name);
				}
			}

			names.insert(name);

			return name;
		}

	private:
		std::set<stringtype> names;
	};

	typedef NamePoolBase<std::string> NamePool;
	typedef NamePoolBase<std::wstring> WNamePool;
}

#endif /* GLTB_NAMEPOOL_H_ */