elementrarray.cpp

来自「series60 应用程序开发的源代码 series60 应用程序开发的源代码」· C++ 代码 · 共 122 行

/**
*
* @brief Specialisation of CElementList to store the elements in an RArray class
*
* Copyright (c) EMCC Software Ltd 2003
* @version 1.0
*/

// INCLUDE FILES

// Class include
#include "elementrarray.h"

// User includes
#include "chemicalelement.h"
#include "elementcomparisonfunctions.h"

// ================= MEMBER FUNCTIONS =======================

CElementRArray::CElementRArray() :
iElementArray(KElementListGranularity)
{
}

CElementRArray::~CElementRArray()
{
    DeleteAllElements();
}

//Getters
TInt CElementRArray::NumberOfElements() const
{
    return iElementArray.Count();
}

//Array manipulators and accessors
const CChemicalElement& CElementRArray::At(TInt aPosition) const
{
    return *iElementArray[aPosition];    //const overload
}

CChemicalElement& CElementRArray::At(TInt aPosition) 
{
    return *iElementArray[aPosition];    //non-const overload
}

void CElementRArray::AppendL(const CChemicalElement* aElement)
{
    User::LeaveIfError(iElementArray.Append(aElement));
}

void CElementRArray::DeleteAllElements()
{
    iElementArray.ResetAndDestroy();    //Deletes all the elements owned by the array
}

TInt CElementRArray::DoFindL(const TIdentityRelation<CChemicalElement>& aRelation, const TDesC& aName,
    const TDesC& aSymbol, TInt aAtomicNumber) const
{
    //A utility function to wrap up the find operation
    CChemicalElement* example = CChemicalElement::NewL(aName, aSymbol, aAtomicNumber, 0);    //The example element to search for
    TInt foundAt = iElementArray.Find(example, aRelation);
    delete example;                        //No longer need the example element
    User::LeaveIfError(foundAt);        //Leave if an error (i.e. KErrNotFound)
    return foundAt;
}

using namespace NElementComparisonFunctions;

TInt CElementRArray::FindElementByNameL(const TDesC& aName) const
{
    //Wrap up a function pointer to the identity function
    TIdentityRelation<CChemicalElement> relation(ElementsHaveSameName);
    //Find the element using the given name only
    return DoFindL(relation, aName, KNullDesC, 0);
}

TInt CElementRArray::FindElementBySymbolL(const TDesC& aSymbol) const
{
    //Wrap up a function pointer to the identity function
    TIdentityRelation<CChemicalElement> relation(ElementsHaveSameSymbol);
    //Find the element using the given symbol only
    return DoFindL(relation, KNullDesC, aSymbol, 0);
}

TInt CElementRArray::FindElementByAtomicNumberL(TInt aAtomicNumber) const
{
    //Wrap up a function pointer to the identity function
    TIdentityRelation<CChemicalElement> relation(ElementsHaveSameAtomicNumber);
    //Find the element using the given atomic number only
    return DoFindL(relation, KNullDesC, KNullDesC, aAtomicNumber);
}

void CElementRArray::SortByNameL()
{
    //Wrap up a function pointer to the comparison function
    TLinearOrder<CChemicalElement> order(CompareElementsName);
    iElementArray.Sort(order);
}

void CElementRArray::SortBySymbolL()
{
    //Wrap up a function pointer to the comparison function
    TLinearOrder<CChemicalElement> order(CompareElementsSymbol);
    iElementArray.Sort(order);
}

void CElementRArray::SortByAtomicNumberL()
{
    //Wrap up a function pointer to the comparison function
    TLinearOrder<CChemicalElement> order(CompareElementsAtomicNumber);
    iElementArray.Sort(order);
}

void CElementRArray::SortByRelativeAtomicMassL()
{
    //Wrap up a function pointer to the comparison function
    TLinearOrder<CChemicalElement> order(CompareElementsRelativeAtomicMass);
    iElementArray.Sort(order);
}
// End of File