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using System;
using System.Collections.Generic;
namespace SharpCifs.Util.Sharpen
{
internal class EnumeratorWrapper<T> : Iterator<T>
{
object _collection;
IEnumerator<T> _e;
T _lastVal;
bool _more;
bool _copied;
public EnumeratorWrapper (object collection, IEnumerator<T> e)
{
this._e = e;
this._collection = collection;
_more = e.MoveNext ();
}
public override bool HasNext ()
{
return _more;
}
public override T Next ()
{
if (!_more)
throw new NoSuchElementException ();
_lastVal = _e.Current;
_more = _e.MoveNext ();
return _lastVal;
}
public override void Remove ()
{
ICollection<T> col = _collection as ICollection<T>;
if (col == null) {
throw new NotSupportedException ();
}
if (_more && !_copied) {
// Read the remaining elements, since the current enumerator
// will be invalid after removing the element
List<T> remaining = new List<T> ();
do {
remaining.Add (_e.Current);
} while (_e.MoveNext ());
_e = remaining.GetEnumerator ();
_e.MoveNext ();
_copied = true;
}
col.Remove (_lastVal);
}
}
}
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