// 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
//
// Authors:
// Alejandro Serrano "Serras" (trupill@yahoo.es)
//
using System;
using System.Collections;
using System.Collections.Generic;
#if !NET_3_0 && !LINQBRIDGE
namespace System.Linq
{
public class Lookup<TKey, TElement> : IEnumerable<IGrouping<TKey, TElement>>
{
Dictionary<TKey, IGrouping<TKey, TElement>> groups;
internal Lookup (Dictionary<TKey, List<TElement>> groups)
{
this.groups = new Dictionary<TKey, IGrouping<TKey, TElement>> ();
foreach (KeyValuePair<TKey, List<TElement>> group in groups)
this.groups.Add (group.Key, new Grouping<TKey, TElement>(group.Key, group.Value));
}
public int Count {
get { return groups.Count; }
}
public bool Contains (TKey key)
{
return groups.ContainsKey (key);
}
public IEnumerable<TElement> this [TKey key]
{
get { return groups[key]; }
}
public IEnumerator<IGrouping<TKey, TElement>> GetEnumerator ()
{
return groups.Values.GetEnumerator ();
}
IEnumerator IEnumerable.GetEnumerator ()
{
return groups.Values.GetEnumerator ();
}
}
}
#endif