ItemArrayEnumerator.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2026 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* ItemArrayEnumerator.h                                       (C) 2000-2025 */
/*                                                                           */
/* Enumerator over an array of mesh entities.                                */
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#ifndef ARCANE_CORE_ITEMARRAYENUMERATOR_H
#define ARCANE_CORE_ITEMARRAYENUMERATOR_H
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#include "arcane/core/Item.h"
 
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namespace Arcane
{
 
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/*!
 * \brief Enumerator over an array of mesh entities.
 */
class ARCANE_CORE_EXPORT ItemArrayEnumerator
{
 public:
 
  typedef ItemInternal* ItemPtr;
  typedef ItemPtr* Iterator;
 
 public:
 
  ItemArrayEnumerator(const Int32ConstArrayView ids, const ItemInternalList& items_internal)
  : m_current(0)
  , m_end(ids.size())
  , m_items_local_id(ids.data())
  , m_items_internal(items_internal.data())
  {
  }
  ItemArrayEnumerator(const Int32* ids, Integer nb_item, const ItemPtr* items_internal)
  : m_current(0)
  , m_end(nb_item)
  , m_items_local_id(ids)
  , m_items_internal(items_internal)
  {
  }
 
 public:
 
  inline void operator++()
  {
    ++m_current;
  }
  inline bool hasNext() const
  {
    return m_current < m_end;
  }
  inline Integer itemLocalId() const
  {
    return m_items_local_id[m_current];
  }
  inline Integer index() const
  {
    return m_current;
  }
  inline Item operator*() const
  {
    return Item(m_items_internal, m_items_local_id[m_current]);
  }
 
 protected:
 
  Integer m_current;
  Integer m_end;
  const Int32* ARCANE_RESTRICT m_items_local_id;
  const ItemPtr* m_items_internal;
};
 
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/*!
 * \brief Enumerator over an array of mesh entities of type \a ItemType.
 */
template <typename ItemType>
class ItemArrayEnumeratorT
: public ItemArrayEnumerator
{
 public:
 
  ItemArrayEnumeratorT(const Int32ConstArrayView ids, const ItemInternalList& items_internal)
  : ItemArrayEnumerator(ids, items_internal)
  {
  }
  ItemArrayEnumeratorT(const Int32* ids, Integer nb_item, const ItemPtr* items_internal)
  : ItemArrayEnumerator(ids, nb_item, items_internal)
  {
  }
  inline ItemType operator*() const
  {
    return ItemType(m_items_internal, m_items_local_id[m_current]);
  }
};
 
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} // namespace Arcane
 
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#endif