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#include "ResIDGenerator.hxx"

/**
   * Destructor 
   *
   * @param   
   * @return  
   */
ResIDGenerator::~ResIDGenerator()
{
}

/**
   * SubList stores those IDs that were ever generated and deleted, the method 
   * return the ID from subList first if subList is not empty,else return ++max. 
   * Add the obsolete IDs by calling SetSub method
   * 
   * @param   
   * @return  new resource ID.
   */
long ResIDGenerator::GenerateNewResID()
{
    if (max == LONG_MAX)
    {
        if (!subList.empty())
        {
            long nRes = *(subList.begin());
            subList.pop_front();
            return nRes;
        }
    }
    return -(++max);
}