|| || || || || || || ||

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NumberGenerator.h

Go to the documentation of this file.

#ifndef Impala_Util_NumberGenerator_h
#define Impala_Util_NumberGenerator_h

#include <exception>

namespace Impala
{
namespace Util
{

// Simple class to generate consecutive numbers.
// Note that no means (other than throwing an exception) is yet implemented to prevent overflow!!
class NumberGenerator
{

#define BASE_VALUE 0

public:

    NumberGenerator(unsigned long highestValueIssued = BASE_VALUE)
    {
        mHighestValueIssued = highestValueIssued;
    }

    unsigned long Generate()
    {
        if (++mHighestValueIssued == BASE_VALUE)
            throw std::runtime_error("end of number range reached");

        return mHighestValueIssued;
    }

    void SetHighestValueIssued(unsigned long newHighestValueIssued)
    {
        if (newHighestValueIssued > mHighestValueIssued) 
            mHighestValueIssued = newHighestValueIssued;
    }

    unsigned long GetHighestValueIssued()
    {
        return mHighestValueIssued;
    }

private:

    unsigned long mHighestValueIssued;

}; //class

} // namespace Util
} // namespace Impala

#endif

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