// ==++==
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--==
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

using System;

namespace System.Collections {
    // Useful base class for typed read/write collections where items derive from object
    public abstract class DictionaryBase : IDictionary {
        Hashtable hashtable;

        protected Hashtable InnerHashtable { get; }
        protected IDictionary Dictionary { get; }
        public int Count { get; }
        bool IDictionary.IsReadOnly { get; }
        bool IDictionary.IsFixedSize { get; }
        bool ICollection.IsSynchronized { get; }
        ICollection IDictionary.Keys { get; }
        Object ICollection.SyncRoot { get; }
        ICollection IDictionary.Values { get; }

        public void CopyTo(Array array, int index);

        object IDictionary.this[object key] { get; set; }

        bool IDictionary.Contains(object key);
        void IDictionary.Add(object key, object value);
        void IDictionary.Remove(object key);

        public void Clear();

        public IDictionaryEnumerator GetEnumerator();
        IEnumerator IEnumerable.GetEnumerator();

        protected virtual object OnGet(object key, object currentValue);
        protected virtual void OnSet(object key, object oldValue, object newValue);
        protected virtual void OnInsert(object key, object value);
        protected virtual void OnClear();
        protected virtual void OnRemove(object key, object value);
        protected virtual void OnValidate(object key, object value);
        protected virtual void OnSetComplete(object key, object oldValue, object newValue);
        protected virtual void OnInsertComplete(object key, object value);
        protected virtual void OnClearComplete();
        protected virtual void OnRemoveComplete(object key, object value);
    }
}