//This is the file: pfarraybak.cpp. 
//This is the implementation for the template class PFArrayBak. The
//interface for the template class PFArrayBak is in the file pfarraybak.h.
#include "pfarraybak.h"
#include <iostream>
using std::cout;


namespace PFArraySavitch
{

    template<class T>
    PFArrayBak<T>::PFArrayBak( ) : PFArray<T>( ), usedB(0)
    {
        b = new T[getCapacity( )];
    }

    template<class T>
    PFArrayBak<T>::PFArrayBak(int capacityValue)
                   : PFArray<T>(capacityValue), usedB(0)
    {
        b = new T[getCapacity( )];
    }


    template<class T>
    PFArrayBak<T>::PFArrayBak(const PFArrayBak<T>& oldObject) 
                  : PFArray<T>(oldObject), usedB(0)
    {
        b = new T[getCapacity( )];
        usedB = oldObject.getNumberUsed();
        for (int i = 0; i < usedB; i++)
            b[i] = oldObject.b[i];
    }

    template<class T> 
    void PFArrayBak<T>::backup( )
    {
        usedB = getNumberUsed( );
        for (int i = 0; i < usedB; i++)
            b[i] = operator[](i);
    }

    template<class T>
    void PFArrayBak<T>::restore( )
    {
        emptyArray( );

        for (int i = 0; i < usedB; i++)
            addElement(b[i]);
    }

    template<class T>
    PFArrayBak<T>& PFArrayBak<T>::operator =(const PFArrayBak<T>& rightSide)
    {
        PFArray<T>::operator =(rightSide);

        if (getCapacity( ) != rightSide.getCapacity( ))
        {
            delete [] b;
            b = new T[rightSide.getCapacity( )];
        }

        usedB = rightSide.usedB;
        for (int i = 0; i < usedB; i++)
            b[i] = rightSide.b[i];

        return *this;
    }

    template<class T>
    PFArrayBak<T>::~PFArrayBak( )
    {
        delete [] b;
    }
}// PFArraySavitch