ExpressionBindingCollection.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » C# / CSharp Open Source

//
// System.Web.UI.ExpressionBindingCollection.cs
//
// Authors:
//   Sanjay Gupta gsanjay@novell.com)
//
// (C) 2004-2010 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;
using System.ComponentModel;
using System.Collections;

namespace System.Web.UI{
      
  public sealed class ExpressionBindingCollection : ICollection, IEnumerable
      {
    static readonly object changedEvent = new object ();
    
    Hashtable list;
    ArrayList removed;

    EventHandlerList events = new EventHandlerList ();
    
          public event EventHandler Changed {
      add { events.AddHandler (changedEvent, value); }
      remove { events.RemoveHandler (changedEvent, value); }
    }
    
    public ExpressionBindingCollection ()
    {
      list = new Hashtable ();
      removed = new ArrayList ();
    }

    public int Count {
      get { return list.Count; }
    }

    public bool IsReadOnly {
      get { return list.IsReadOnly; }
    }

    public bool IsSynchronized {
      get { return list.IsSynchronized; }
    }

    public ExpressionBinding this [string propertyName] {
                get { return list [propertyName] as ExpressionBinding; }
          }

    public ICollection RemovedBindings {
      get { return removed; }
    }

    public object SyncRoot {
      get { return list.SyncRoot; }
    }

    public void Add (ExpressionBinding binding)
    {
      list.Add (binding.PropertyName, binding);
                OnChanged (new EventArgs ());
          }

    public void Clear ()
    {
      list.Clear ();
                removed.Clear ();
                OnChanged (new EventArgs ());
          }

          public bool Contains (string propertyName)
          {
                return list.Contains (propertyName);
          }

    public void CopyTo (Array array, int index)
    {
      list.CopyTo (array, index);
    }

          public void CopyTo (ExpressionBinding [] bindings, int index)
          {
                if (index < 0)
                    throw new ArgumentNullException ("Index cannot be negative");
                if (index >= bindings.Length)
                    throw new ArgumentException ("Index cannot be greater than or equal to length of array passed");            
                if (list.Count > (bindings.Length - index + 1))
                    throw new ArgumentException ("Number of elements in source is greater than available space from index to end of destination");
            
                foreach (string key in list.Keys)
                    bindings [index++] = (ExpressionBinding) list [key];
          }

    public IEnumerator GetEnumerator ()
    {
      return list.GetEnumerator ();
    }

    public void Remove (ExpressionBinding binding)
    {
      Remove(binding.PropertyName, true);
          }

    public void Remove (string propertyName)
    {
      Remove (propertyName, true);            
          }

    public void Remove (string propertyName, bool addToRemovedList)
    {
      if (addToRemovedList)
        removed.Add (String.Empty); 
      else
        removed.Add (propertyName);

      list.Remove (propertyName);
                OnChanged (new EventArgs ());
          }

          void OnChanged (EventArgs e)   
          {
      EventHandler eh = events [changedEvent] as EventHandler;
                if (eh != null)
                    eh (this, e);
          }        

      }
}