aspnetcore/src/Connections.Abstractions/ConnectionItems.cs

117 lines
3.2 KiB
C#

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Collections;
using System.Collections.Generic;
namespace Microsoft.AspNetCore.Connections
{
public class ConnectionItems : IDictionary<object, object>
{
public ConnectionItems()
: this(new Dictionary<object, object>())
{
}
public ConnectionItems(IDictionary<object, object> items)
{
Items = items;
}
public IDictionary<object, object> Items { get; }
// Replace the indexer with one that returns null for missing values
object IDictionary<object, object>.this[object key]
{
get
{
if (Items.TryGetValue(key, out var value))
{
return value;
}
return null;
}
set { Items[key] = value; }
}
void IDictionary<object, object>.Add(object key, object value)
{
Items.Add(key, value);
}
bool IDictionary<object, object>.ContainsKey(object key)
{
return Items.ContainsKey(key);
}
ICollection<object> IDictionary<object, object>.Keys
{
get { return Items.Keys; }
}
bool IDictionary<object, object>.Remove(object key)
{
return Items.Remove(key);
}
bool IDictionary<object, object>.TryGetValue(object key, out object value)
{
return Items.TryGetValue(key, out value);
}
ICollection<object> IDictionary<object, object>.Values
{
get { return Items.Values; }
}
void ICollection<KeyValuePair<object, object>>.Add(KeyValuePair<object, object> item)
{
Items.Add(item);
}
void ICollection<KeyValuePair<object, object>>.Clear()
{
Items.Clear();
}
bool ICollection<KeyValuePair<object, object>>.Contains(KeyValuePair<object, object> item)
{
return Items.Contains(item);
}
void ICollection<KeyValuePair<object, object>>.CopyTo(KeyValuePair<object, object>[] array, int arrayIndex)
{
Items.CopyTo(array, arrayIndex);
}
int ICollection<KeyValuePair<object, object>>.Count
{
get { return Items.Count; }
}
bool ICollection<KeyValuePair<object, object>>.IsReadOnly
{
get { return Items.IsReadOnly; }
}
bool ICollection<KeyValuePair<object, object>>.Remove(KeyValuePair<object, object> item)
{
if (Items.TryGetValue(item.Key, out var value) && Equals(item.Value, value))
{
return Items.Remove(item.Key);
}
return false;
}
IEnumerator<KeyValuePair<object, object>> IEnumerable<KeyValuePair<object, object>>.GetEnumerator()
{
return Items.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return Items.GetEnumerator();
}
}
}