Daily update 2 on 20240228 by nitload youmu

StgSharp.Common/Collections/PartialDictionary.cs

@@ -0,0 +1,184 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="PartialDictionary.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     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.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Net.Http.Headers;
+using System.Text;
+
+namespace StgSharp.Collections
+{
+    public partial class PartialDictionary<TKey, TValue> : IDictionary<TKey, TValue>
+    {
+        private readonly Dictionary<TKey, TValue> _source;
+        private readonly HashSet<TKey> _keys;
+        private readonly PartialDictionaryValues _values;
+
+        public PartialDictionary(
+                       Dictionary<TKey, TValue> source,
+                       TKey[] index )
+        {
+            _source = source;
+            _keys = new HashSet<TKey>( index );
+            foreach( TKey item in _keys ) {
+                if( !_source.ContainsKey( item ) ) {
+                    _source.Add( item, default! );
+                }
+            }
+            _values = new PartialDictionaryValues( this );
+        }
+
+        public PartialDictionary(
+                       Dictionary<TKey, TValue> source,
+                       HashSet<TKey> keys )
+        {
+            _source = source;
+            _keys = keys;
+            foreach( TKey item in _keys ) {
+                if( !_source.ContainsKey( item ) ) {
+                    _source.Add( item, default! );
+                }
+            }
+            _values = new PartialDictionaryValues( this );
+        }
+
+        public PartialDictionary(
+                Dictionary<TKey, TValue> source,
+                TKey[] index, IHashMultiplexer<TKey> multiplexer
+            )
+        {
+            _source = source;
+            _keys = new HashSet<TKey>(index);
+            foreach (TKey item in _keys)
+            {
+                if (!_source.ContainsKey(item))
+                {
+                    _source.Add(item, default!);
+                }
+            }
+            _values = new PartialDictionaryValues(this);
+        }
+
+        public TValue this[ TKey key ]
+        {
+            get
+            {
+                if( _keys.Contains( key ) ) {
+                    return _source[ key ];
+                }
+                throw new KeyNotFoundException();
+            }
+            set
+            {
+                if( _keys.Contains( key ) ) {
+                    _source[ key ] = value;
+                }
+                throw new KeyNotFoundException();
+            }
+        }
+
+        public ICollection<TKey> Keys => _keys;
+
+        public ICollection<TValue> Values => _values;
+
+        public int Count => _keys.Count;
+
+        public bool Contains( KeyValuePair<TKey, TValue> item )
+        {
+            return _keys.Contains( item.Key ) && _source.Contains( item );
+        }
+
+        public bool ContainsKey( TKey key )
+        {
+            return _keys.Contains( key );
+        }
+
+        public void CopyTo( KeyValuePair<TKey, TValue>[] array, int arrayIndex )
+        {
+            throw new NotImplementedException();
+        }
+
+        public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
+        {
+            foreach( TKey item in _keys ) {
+                yield return new KeyValuePair<TKey, TValue>(
+                    item, _source[ item ] );
+            }
+        }
+
+        public bool TryGetValue( TKey key, out TValue value )
+        {
+            if( _keys.Contains( key ) ) {
+                value = _source[ key ];
+                return true;
+            }
+            value = default!;
+            return false;
+        }
+
+        void ICollection<KeyValuePair<TKey, TValue>>.Add(
+                                                             KeyValuePair<TKey, TValue> item )
+        {
+            return;
+        }
+
+        void ICollection<KeyValuePair<TKey, TValue>>.Clear()
+        {
+            throw new NotSupportedException();
+        }
+
+        bool ICollection<KeyValuePair<TKey, TValue>>.Remove(
+                                                             KeyValuePair<TKey, TValue> item )
+        {
+            throw new NotSupportedException();
+        }
+
+        bool ICollection<KeyValuePair<TKey, TValue>>.IsReadOnly => true;
+
+        void IDictionary<TKey, TValue>.Add( TKey key, TValue value )
+        {
+            return;
+        }
+
+        bool IDictionary<TKey, TValue>.Remove( TKey key )
+        {
+            throw new NotSupportedException();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+    }
+}