GroupCollection.cs :  » 2.6.4-mono-.net-core » System.Text » System » Text » RegularExpressions » C# / CSharp Open Source

//
// System.Text.RegularExpressions.GroupCollection
//
// Authors:
//  Dan Lewis (dlewis@gmx.co.uk)
//  Dick Porter (dick@ximian.com)
//
// (C) 2002 Dan Lewis
// (C) 2004 Novell, Inc.
//

//
// 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.Collections;

namespace System.Text.RegularExpressions{
  [Serializable]
  public class GroupCollection: ICollection, IEnumerable
  {
    private Group [] list;
    private int gap;

    /* No public constructor */
    internal GroupCollection (int n, int gap)
    {
      list = new Group [n];
      this.gap = gap;
    }

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

    public bool IsReadOnly {
      get { return true; }
    }

    public bool IsSynchronized {
      get { return false; }
    }

    public Group this [int i] {
      get {
        if (i >= gap) {
          Match m = (Match) list [0];
          i = m == Match.Empty ? -1 : m.Regex.GetGroupIndex (i);
        }
        return i < 0 ? Group.Fail : list [i];
      }
    }

    internal void SetValue (Group g, int i)
    {
      list [i] = g;
    }

    public Group this [string groupName] {
      get {
        // The 0th group is the match.
        Match m = (Match) list [0];
        if (m != Match.Empty) {
          int number = m.Regex.GroupNumberFromName (groupName);
          if (number != -1)
            return this [number];
        }

        return Group.Fail;
      }
    }

    public object SyncRoot {
      get { return list; }
    }

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

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