ah-mapping.H

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/*
                          Aleph_w
 
  Data structures & Algorithms
  version 2.0.0b
  https://github.com/lrleon/Aleph-w
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2026 Leandro Rabindranath Leon
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
 
 
#ifndef AH_MAPPING_H
#define AH_MAPPING_H
 
#include <ah-errors.H>
#include <tpl_dynMapTree.H>
 
namespace Aleph
{
  template <typename Key, typename ValueType>
  class AHMapping
  {
    DynMapTree<Key, ValueType> tbl;
 
  public:
    using key_type = Key; 
    using mapped_type = ValueType; 
    using value_type = std::pair<const Key, ValueType>; 
    using size_type = size_t; 
 
    AHMapping() = default;
 
    AHMapping(const AHMapping & other) = default;
 
    AHMapping(AHMapping && other) noexcept = default;
 
    template <typename... Pairs>
    AHMapping(const Key & key, const ValueType & value, Pairs... pairs)
      : AHMapping(pairs...)
    {
      tbl.insert(key, value);
    }
 
    AHMapping &operator=(const AHMapping & other) = default;
 
    AHMapping &operator=(AHMapping && other) noexcept = default;
 
    void insert(const Key & key, const ValueType & value)
    {
      tbl.insert(key, value);
    }
 
    const ValueType &operator[](const Key & key) const
    {
      auto ptr = tbl.search(key);
      ah_domain_error_if(ptr == nullptr) << "Key not found: " << key;
      return ptr->second;
    }
 
    ValueType &operator[](const Key & key)
    {
      return tbl[key];
    }
 
    AHMapping<ValueType, Key> inverse() const
    {
      AHMapping<ValueType, Key> ret;
      for (auto it = tbl.get_it(); it.has_curr(); it.next())
        {
          auto curr = it.get_curr();
          ret.insert(curr.second, curr.first);
        }
      return ret;
    }
 
    bool remove(const Key & key) noexcept
    {
      try
        {
          tbl.remove(key);
          return true;
        }
      catch (...)
        {
          return false;
        }
    }
 
    bool valid_key(const Key & key) const noexcept
    {
      return tbl.has(key);
    }
 
    DynList<Key> keys() const
    {
      return tbl.keys();
    }
 
    DynList<ValueType> values() const
    {
      DynList<ValueType> result;
      for (auto it = tbl.get_it(); it.has_curr(); it.next())
        result.append(it.get_curr().second);
      return result;
    }
 
    size_t size() const noexcept
    {
      return tbl.size();
    }
 
    bool empty() const noexcept
    {
      return size() == 0;
    }
 
    void clear() noexcept
    {
      tbl.empty();
    }
 
    bool contains_value(const ValueType & value) const
    {
      for (auto it = tbl.get_it(); it.has_curr(); it.next())
        if (it.get_curr().second == value)
          return true;
      return false;
    }
 
    template <typename F>
    void for_each(F f) const
    {
      static_assert(std::is_invocable_v<F, const Key &, const ValueType &>,
                    "Function must take (const Key&, const ValueType&) parameters");
 
      for (auto it = tbl.get_it(); it.has_curr(); it.next())
        {
          const auto & pair = it.get_curr();
          f(pair.first, pair.second);
        }
    }
  };
} // end namespace Aleph
 
#endif // AH_MAPPING_H