82 lines
2.2 KiB
C#
82 lines
2.2 KiB
C#
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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 LeanCloud.Utilities;
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namespace LeanCloud.Storage.Internal {
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/// <summary>
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/// Provides a List implementation that can delegate to any other
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/// list, regardless of its value type. Used for coercion of
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/// lists when returning them to users.
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/// </summary>
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/// <typeparam name="TOut">The resulting type of value in the list.</typeparam>
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/// <typeparam name="TIn">The original type of value in the list.</typeparam>
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[Preserve(AllMembers = true, Conditional = false)]
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public class FlexibleListWrapper<TOut, TIn> : IList<TOut> {
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private IList<TIn> toWrap;
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public FlexibleListWrapper(IList<TIn> toWrap) {
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this.toWrap = toWrap;
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}
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public int IndexOf(TOut item) {
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return toWrap.IndexOf((TIn)Conversion.ConvertTo<TIn>(item));
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}
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public void Insert(int index, TOut item) {
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toWrap.Insert(index, (TIn)Conversion.ConvertTo<TIn>(item));
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}
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public void RemoveAt(int index) {
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toWrap.RemoveAt(index);
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}
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public TOut this[int index] {
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get {
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return (TOut)Conversion.ConvertTo<TOut>(toWrap[index]);
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}
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set {
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toWrap[index] = (TIn)Conversion.ConvertTo<TIn>(value);
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}
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}
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public void Add(TOut item) {
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toWrap.Add((TIn)Conversion.ConvertTo<TIn>(item));
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}
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public void Clear() {
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toWrap.Clear();
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}
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public bool Contains(TOut item) {
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return toWrap.Contains((TIn)Conversion.ConvertTo<TIn>(item));
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}
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public void CopyTo(TOut[] array, int arrayIndex) {
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toWrap.Select(item => (TOut)Conversion.ConvertTo<TOut>(item))
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.ToList().CopyTo(array, arrayIndex);
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}
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public int Count {
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get { return toWrap.Count; }
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}
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public bool IsReadOnly {
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get { return toWrap.IsReadOnly; }
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}
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public bool Remove(TOut item) {
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return toWrap.Remove((TIn)Conversion.ConvertTo<TIn>(item));
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}
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public IEnumerator<TOut> GetEnumerator() {
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foreach (var item in (IEnumerable)toWrap) {
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yield return (TOut)Conversion.ConvertTo<TOut>(item);
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}
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}
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System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() {
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return this.GetEnumerator();
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}
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}
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}
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