Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Collections / CollectionBase.cs / 1305376 / CollectionBase.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //------------------------------------------------------------------------------ //----------------------------------------------------------------------------- //[....] // namespace System.Collections { using System; using System.Diagnostics.Contracts; // Useful base class for typed read/write collections where items derive from object [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class CollectionBase : IList { ArrayList list; protected CollectionBase() { list = new ArrayList(); } protected CollectionBase(int capacity) { list = new ArrayList(capacity); } protected ArrayList InnerList { get { if (list == null) list = new ArrayList(); return list; } } protected IList List { get { return (IList)this; } } [System.Runtime.InteropServices.ComVisible(false)] public int Capacity { get { return InnerList.Capacity; } set { InnerList.Capacity = value; } } public int Count { get { return list == null ? 0 : list.Count; } } public void Clear() { OnClear(); InnerList.Clear(); OnClearComplete(); } public void RemoveAt(int index) { if (index < 0 || index >= Count) throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index")); Contract.EndContractBlock(); Object temp = InnerList[index]; OnValidate(temp); OnRemove(index, temp); InnerList.RemoveAt(index); try { OnRemoveComplete(index, temp); } catch { InnerList.Insert(index, temp); throw; } } bool IList.IsReadOnly { get { return InnerList.IsReadOnly; } } bool IList.IsFixedSize { get { return InnerList.IsFixedSize; } } bool ICollection.IsSynchronized { get { return InnerList.IsSynchronized; } } Object ICollection.SyncRoot { get { return InnerList.SyncRoot; } } void ICollection.CopyTo(Array array, int index) { InnerList.CopyTo(array, index); } Object IList.this[int index] { get { if (index < 0 || index >= Count) throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index")); Contract.EndContractBlock(); return InnerList[index]; } set { if (index < 0 || index >= Count) throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index")); Contract.EndContractBlock(); OnValidate(value); Object temp = InnerList[index]; OnSet(index, temp, value); InnerList[index] = value; try { OnSetComplete(index, temp, value); } catch { InnerList[index] = temp; throw; } } } bool IList.Contains(Object value) { return InnerList.Contains(value); } int IList.Add(Object value) { OnValidate(value); OnInsert(InnerList.Count, value); int index = InnerList.Add(value); try { OnInsertComplete(index, value); } catch { InnerList.RemoveAt(index); throw; } return index; } void IList.Remove(Object value) { OnValidate(value); int index = InnerList.IndexOf(value); if (index < 0) throw new ArgumentException(Environment.GetResourceString("Arg_RemoveArgNotFound")); OnRemove(index, value); InnerList.RemoveAt(index); try{ OnRemoveComplete(index, value); } catch { InnerList.Insert(index, value); throw; } } int IList.IndexOf(Object value) { return InnerList.IndexOf(value); } void IList.Insert(int index, Object value) { if (index < 0 || index > Count) throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index")); Contract.EndContractBlock(); OnValidate(value); OnInsert(index, value); InnerList.Insert(index, value); try { OnInsertComplete(index, value); } catch { InnerList.RemoveAt(index); throw; } } public IEnumerator GetEnumerator() { return InnerList.GetEnumerator(); } protected virtual void OnSet(int index, Object oldValue, Object newValue) { } protected virtual void OnInsert(int index, Object value) { } protected virtual void OnClear() { } protected virtual void OnRemove(int index, Object value) { } protected virtual void OnValidate(Object value) { if (value == null) throw new ArgumentNullException("value"); Contract.EndContractBlock(); } protected virtual void OnSetComplete(int index, Object oldValue, Object newValue) { } protected virtual void OnInsertComplete(int index, Object value) { } protected virtual void OnClearComplete() { } protected virtual void OnRemoveComplete(int index, Object value) { } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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