using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace LB_SmartVision
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{
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[Serializable]
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public class LB_Collections<T> : ICollection<CollectionItem<T>>
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{
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private List<CollectionItem<T>> _items = new List<CollectionItem<T>>();
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// 通过名称查找
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public CollectionItem<T> Get(string name)
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{
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var item = _items.FirstOrDefault(item => item.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
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if (item == null)
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return default;
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return item;
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}
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// 通过索引查找
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public CollectionItem<T> Get(int index)
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{
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var item = _items.FirstOrDefault(item => item.Index == index);
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if (item == null)
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return default;
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return item;
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}
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// ICollection<NamedItem<T>> 实现
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public int Count => _items.Count;
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public bool IsReadOnly => false;
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void ICollection<CollectionItem<T>>.Add(CollectionItem<T> item)
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{
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var existingItem = Get(item.Name);
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if (existingItem != null)
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{
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// 如果已存在，更新现有项的值
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existingItem = item;
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}
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else
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{
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// 如果不存在，创建新项并分配索引
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_items.Add(item);
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}
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// 更新后自动排序
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SortItems();
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}
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// 添加项时为新项分配一个索引
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public void Add(string name, T value)
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{
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var existingItem = Get(name);
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if (existingItem != null)
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{
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// 如果已存在，更新现有项的值
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existingItem.Value = value;
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}
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else
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{
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// 如果不存在，创建新项并分配索引
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var newItem = new CollectionItem<T>(name, _items.Count > 0 ? _items.Max(i => i.Index) + 1 : 0, value);
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_items.Add(newItem);
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}
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// 更新后自动排序
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SortItems();
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}
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// 按 Index 排序集合
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private void SortItems()
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{
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_items = _items.OrderBy(item => item.Index).ToList();
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}
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// 通过索引器实现基于序号的访问
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public T this[int index]
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{
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get
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{
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if (index < 0 || index >= _items.Count)
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{
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return default;
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}
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return _items[index].Value;
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}
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set
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{
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if (index < 0 || index >= _items.Count)
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{
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return;
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}
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_items[index].Value = value;
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}
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}
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public T this[string name]
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{
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get
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{
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var existingItem = Get(name);
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if (existingItem != null)
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{
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// 如果已存在，更新现有项的值
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return existingItem.Value;
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}
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return default;
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}
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set
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{
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var item = _items.FirstOrDefault(i => i.Name == name);
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if (item != null)
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{
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item.Value = value;
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}
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}
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}
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public void Clear()
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{
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_items.Clear();
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_items.TrimExcess(); // 将容量缩减到实际元素数量
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}
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public bool Contains(CollectionItem<T> item)
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{
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return _items.Contains(item);
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}
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public bool Contains(string name)
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{
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var item = _items.FirstOrDefault(i => i.Name == name);
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if (item != null)
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return true;
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return false;
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}
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public void CopyTo(CollectionItem<T>[] array, int arrayIndex)
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{
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_items.CopyTo(array, arrayIndex);
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}
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public bool Remove(CollectionItem<T> item)
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{
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var removed = _items.Remove(item);
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if (removed)
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{
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// 移除元素后，调整后续元素的索引
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UpdateIndexes();
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}
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return removed;
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}
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public IEnumerator<CollectionItem<T>> GetEnumerator()
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{
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return _items.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return _items.GetEnumerator();
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}
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// 通过名称删除
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public bool Remove(string name)
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{
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var namedItem = Get(name);
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if (namedItem != null)
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{
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return Remove(namedItem);
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}
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return false;
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}
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// 通过索引删除
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public bool Remove(int index)
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{
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var namedItem = Get(index);
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if (namedItem != null)
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{
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return Remove(namedItem);
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}
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return false;
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}
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// 删除项后，调整其他项的索引
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private void UpdateIndexes()
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{
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for (int i = 0; i < _items.Count; i++)
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{
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_items[i].Index = i;
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}
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}
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}
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public class CollectionItem<T>
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{
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public string Name { get; set; }
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public int Index { get; set; }
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public T Value { get; set; } // 存储的对象
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public CollectionItem(string name, int index, T value)
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{
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Name = name;
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Index = index;
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Value = value;
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}
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public override string ToString()
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{
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return $"{Name} (Index: {Index}, Value: {Value})";
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}
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}
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}
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