/mcs/class/System.Web/System.Web.UI/StateManagedCollection.cs
C# | 370 lines | 276 code | 64 blank | 30 comment | 51 complexity | 723624f2472a8b06f0ee327a890493a3 MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, CC-BY-SA-3.0, GPL-2.0, Unlicense, Apache-2.0, LGPL-2.0
- //
- // System.Web.UI.StateManagedCollection
- //
- // Authors:
- // Ben Maurer (bmaurer@users.sourceforge.net)
- // Sebastien Pouliot <sebastien@ximian.com>
- // Marek Habersack (mhabersack@novell.com)
- //
- // (C) 2003 Ben Maurer
- // Copyright (C) 2005-2008 Novell, Inc (http://www.novell.com)
- //
- // 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.Collections;
- using System.Collections.Generic;
- namespace System.Web.UI {
- public abstract class StateManagedCollection : IList, IStateManager
- {
- ArrayList items = new ArrayList ();
- bool saveEverything = false;
- protected virtual object CreateKnownType (int index)
- {
- return null;
- }
- public void SetDirty ()
- {
- saveEverything = true;
- for (int i = 0; i < items.Count; i++)
- SetDirtyObject (items[i]);
- }
- protected abstract void SetDirtyObject (object o);
- protected virtual Type [] GetKnownTypes ()
- {
- return null;
- }
-
- #region OnXXX
- protected virtual void OnClear ()
- {
- }
-
- protected virtual void OnClearComplete ()
- {
- }
-
- protected virtual void OnInsert (int index, object value)
- {
- }
-
- protected virtual void OnInsertComplete (int index, object value)
- {
- }
-
- protected virtual void OnRemove (int index, object value)
- {
- }
-
- protected virtual void OnRemoveComplete (int index, object value)
- {
- }
-
- protected virtual void OnValidate (object value)
- {
- if (value == null)
- throw new ArgumentNullException ("value");
- }
- #endregion
-
- #region IStateManager
- void IStateManager.LoadViewState (object savedState)
- {
- if (savedState == null) {
- foreach (IStateManager i in items)
- i.LoadViewState (null);
- return;
- }
- Triplet state = savedState as Triplet;
- if (state == null)
- throw new InvalidOperationException ("Internal error.");
- List <int> indices = state.First as List <int>;
- List <object> states = state.Second as List <object>;
- List <object> types = state.Third as List <object>;
- IList list = this as IList;
- IStateManager item;
- object t;
-
- saveEverything = indices == null;
- if (saveEverything) {
- Clear ();
- for (int i = 0; i < states.Count; i++) {
- t = types [i];
- if (t is Type)
- item = (IStateManager) Activator.CreateInstance ((Type) t);
- else if (t is int)
- item = (IStateManager) CreateKnownType ((int) t);
- else
- continue;
- item.TrackViewState ();
- item.LoadViewState (states [i]);
- list.Add (item);
- }
- return;
- }
- int idx;
- for (int i = 0; i < indices.Count; i++) {
- idx = indices [i];
- if (idx < Count) {
- item = list [idx] as IStateManager;
- item.TrackViewState ();
- item.LoadViewState (states [i]);
- continue;
- }
- t = types [i];
- if (t is Type)
- item = (IStateManager) Activator.CreateInstance ((Type) t);
- else if (t is int)
- item = (IStateManager) CreateKnownType ((int) t);
- else
- continue;
- item.TrackViewState ();
- item.LoadViewState (states [i]);
- list.Add (item);
- }
- }
-
- void AddListItem <T> (ref List <T> list, T item)
- {
- if (list == null)
- list = new List <T> ();
- list.Add (item);
- }
-
- object IStateManager.SaveViewState ()
- {
- Type[] knownTypes = GetKnownTypes ();
- bool haveData = false, haveKnownTypes = knownTypes != null && knownTypes.Length > 0;
- int count = items.Count;
- IStateManager item;
- object itemState;
- Type type;
- int idx;
- List <int> indices = null;
- List <object> states = null;
- List <object> types = null;
- for (int i = 0; i < count; i++) {
- item = items [i] as IStateManager;
- if (item == null)
- continue;
- item.TrackViewState ();
- itemState = item.SaveViewState ();
- if (saveEverything || itemState != null) {
- haveData = true;
- type = item.GetType ();
- idx = haveKnownTypes ? Array.IndexOf (knownTypes, type) : -1;
- if (!saveEverything)
- AddListItem <int> (ref indices, i);
- AddListItem <object> (ref states, itemState);
- if (idx == -1)
- AddListItem <object> (ref types, type);
- else
- AddListItem <object> (ref types, idx);
- }
- }
- if (!haveData)
- return null;
- return new Triplet (indices, states, types);
- }
-
- void IStateManager.TrackViewState ()
- {
- isTrackingViewState = true;
- if (items != null && items.Count > 0) {
- IStateManager item;
- foreach (object o in items) {
- item = o as IStateManager;
- if (item == null)
- continue;
- item.TrackViewState ();
- }
- }
- }
-
- bool isTrackingViewState;
- bool IStateManager.IsTrackingViewState {
- get { return isTrackingViewState; }
- }
- #endregion
-
- #region ICollection, IList, IEnumerable
-
- public void Clear ()
- {
- this.OnClear ();
- items.Clear ();
- this.OnClearComplete ();
-
- if (isTrackingViewState)
- SetDirty ();
- }
-
- public IEnumerator GetEnumerator ()
- {
- return items.GetEnumerator ();
- }
-
- public void CopyTo (Array array, int index)
- {
- items.CopyTo (array, index);
- }
-
- IEnumerator IEnumerable.GetEnumerator ()
- {
- return GetEnumerator ();
- }
-
- int IList.Add (object value)
- {
- OnValidate(value);
- if (isTrackingViewState) {
- ((IStateManager) value).TrackViewState ();
- SetDirtyObject (value);
- }
-
- OnInsert (-1, value);
- items.Add (value);
- OnInsertComplete (-1, value);
-
- return Count - 1;
- }
-
- void IList.Insert (int index, object value)
- {
- OnValidate(value);
- if (isTrackingViewState) {
- ((IStateManager) value).TrackViewState ();
- SetDirty ();
- }
-
- OnInsert (index, value);
- items.Insert (index, value);
- OnInsertComplete(index, value);
- }
-
- void IList.Remove (object value)
- {
- if (value == null)
- return;
- OnValidate (value);
- IList list = (IList)this;
- int i = list.IndexOf (value);
- if (i >= 0)
- list.RemoveAt (i);
- }
- void IList.RemoveAt (int index)
- {
- object o = items [index];
-
- OnRemove (index, o);
- items.RemoveAt (index);
- OnRemoveComplete(index, o);
-
- if (isTrackingViewState)
- SetDirty ();
- }
-
- void IList.Clear ()
- {
- this.Clear ();
- }
-
- bool IList.Contains (object value)
- {
- if (value == null)
- return false;
-
- OnValidate (value);
- return items.Contains (value);
- }
-
- int IList.IndexOf (object value)
- {
- if (value == null)
- return -1;
-
- OnValidate (value);
- return items.IndexOf (value);
- }
- public int Count {
- get { return items.Count; }
- }
-
- int ICollection.Count {
- get { return items.Count; }
- }
-
- bool ICollection.IsSynchronized {
- get { return false; }
- }
-
- object ICollection.SyncRoot {
- get { return this; }
- }
-
- bool IList.IsFixedSize {
- get { return false; }
- }
-
- bool IList.IsReadOnly {
- get { return false; }
- }
-
- object IList.this [int index] {
- get { return items [index]; }
- set {
- if (index < 0 || index >= Count)
- throw new ArgumentOutOfRangeException ("index");
-
- OnValidate (value);
- if (isTrackingViewState) {
- ((IStateManager) value).TrackViewState ();
- SetDirty ();
- }
-
- items [index] = value;
- }
- }
- #endregion
- }
- }