XIterators.cs :  » 2.6.4-mono-.net-core » System.Xml » System » Xml » Linq » C# / CSharp Open Source

//
// Authors:
//   Atsushi Enomoto
//
// Copyright 2007 Novell (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.
//

#if NET_2_0

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml;

using XPISystem.Xml.Linq.XProcessingInstruction;


namespace System.Xml.Linq{
  /*
  // Iterators
  internal class XFilterIterator <T> : IEnumerable <T>
  {
    IEnumerable <object> source;
    XName name;

    public XFilterIterator (IEnumerable <object> source, XName name)
    {
      this.source = source;
      this.name = name;
    }

    public IEnumerator <T> GetEnumerator ()
    {
      foreach (object o in source) {
        if (! (o is T))
          continue;
        if (name != null) {
          if (o is XElement) {
            if (((XElement) o).Name != name)
              continue;
          }
          else if (o is XAttribute) {
            if (((XAttribute) o).Name != name)
              continue;
          }
        }
        yield return (T) o;
      }
    }

    IEnumerator IEnumerable.GetEnumerator ()
    {
      return GetEnumerator ();
    }
  }

  internal class XDescendantIterator <T> : IEnumerable <T>
  {
    IEnumerable <T> source;

    public XDescendantIterator (IEnumerable <object> source)
    {
      this.source = new XFilterIterator <T> (source, null);
    }

    public IEnumerator <T> GetEnumerator ()
    {
      foreach (T t1 in source) {
        yield return t1;
        XContainer xc = t1 as XContainer;
        if (xc == null || xc.FirstChild == null)
          continue;
        foreach (T t2 in new XDescendantIterator <T> (xc.Content ()))
          yield return t2;
      }
    }

    IEnumerator IEnumerable.GetEnumerator ()
    {
      return GetEnumerator ();
    }
  }
  */

#if !LIST_BASED
  internal class XChildrenIterator : IEnumerable <object>
  {
    XContainer source;
    XNode n;

    public XChildrenIterator (XContainer source)
    {
      this.source = source;
    }

    public IEnumerator <object> GetEnumerator ()
    {
      if (n == null) {
        n = source.FirstNode;
        if (n == null)
          yield break;
      }
      do {
        yield return n;
        n = n.NextNode;
      } while (n != source.LastNode);
    }

    IEnumerator IEnumerable.GetEnumerator ()
    {
      return GetEnumerator ();
    }
  }
#endif
}

#endif