ECInstanceIterable.h

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/*--------------------------------------------------------------------------------------+
|
|   Supplied under applicable software license agreement.
|
|   Copyright (c) 2018 Bentley Systems, Incorporated. All rights reserved.
|
+---------------------------------------------------------------------------------------*/
#pragma once
#include <Bentley/VirtualCollectionIterator.h>
#include <ECObjects/ECObjects.h>
BEGIN_BENTLEY_ECOBJECT_NAMESPACE



/*---------------------------------------------------------------------------------**/
template <typename value_type>
struct   IInstanceCollectionIteratorAdapter :public Bentley::RefCountedBase, std::iterator<std::forward_iterator_tag, value_type>
    {
    public:
    typedef value_type&         reference;
    virtual void                MoveToNext  () = 0; 
    virtual bool                IsDifferent (IInstanceCollectionIteratorAdapter const &) const = 0; 
    virtual reference           GetCurrent () = 0; 
    };

/*---------------------------------------------------------------------------------**/
template <typename value_type>
struct IInstanceCollectionAdapter : public Bentley::RefCountedBase
    {
private:

public:
    typedef VirtualCollectionIterator<IInstanceCollectionIteratorAdapter<value_type> > const_iterator;
    virtual const_iterator begin() const = 0; 
    virtual const_iterator end() const = 0; 
    };

typedef ECN::IInstanceCollectionAdapter<IECInstanceP const>                     IECInstanceCollectionAdapter;
typedef RefCountedPtr<IECInstanceCollectionAdapter>                             IECInstanceCollectionAdapterPtr;
typedef ECN::IInstanceCollectionIteratorAdapter<IECInstanceP const>             IECInstanceCollectionIteratorAdapter;
typedef ECN::IInstanceCollectionAdapter<IECRelationshipInstanceP const>         IECRelationshipCollectionAdapter;
typedef RefCountedPtr<IECRelationshipCollectionAdapter>                         IECRelationshipCollectionAdapterPtr;
typedef ECN::IInstanceCollectionIteratorAdapter<IECRelationshipInstanceP const> IECRelationshipCollectionIteratorAdapter;

/*---------------------------------------------------------------------------------**/
struct ECInstanceIterable
    {
    private:
        IECInstanceCollectionAdapterPtr m_collectionPtr;

    public:
        ECInstanceIterable ()
            {
            }

        ECOBJECTS_EXPORT ECInstanceIterable (IECInstanceCollectionAdapter* collection);
    
        typedef IECInstanceCollectionAdapter::const_iterator  const_iterator;
        ECOBJECTS_EXPORT const_iterator begin () const; 
        ECOBJECTS_EXPORT const_iterator end   () const; 
        ECOBJECTS_EXPORT bool empty() const; 
        ECOBJECTS_EXPORT bool IsNull () const; 
    };

/*---------------------------------------------------------------------------------**/
struct ECRelationshipIterable
    {
    private:
        IECRelationshipCollectionAdapterPtr m_collectionPtr;

    public:
        ECRelationshipIterable ()
            {
            }

        ECOBJECTS_EXPORT ECRelationshipIterable (IECRelationshipCollectionAdapter* collection);
    
        typedef IECRelationshipCollectionAdapter::const_iterator  const_iterator;
        ECOBJECTS_EXPORT const_iterator begin () const; 
        ECOBJECTS_EXPORT const_iterator end   () const; 
        ECOBJECTS_EXPORT bool empty() const; 
        ECOBJECTS_EXPORT bool IsNull () const; 
    };
END_BENTLEY_ECOBJECT_NAMESPACE