AggregateDictionary.cs :  » 2.6.4-mono-.net-core » System.Runtime » System » Runtime » Remoting » Channels » Http » C# / CSharp Open Source

//
// System.Runtime.Remoting.Channels.AggregateDictionary.cs
//
// Author: Lluis Sanchez Gual (lluis@ximian.com)
//
// 2002 (C) Copyright, 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.Collections;

namespace System.Runtime.Remoting.Channels.Http{
  internal class AggregateDictionary : IDictionary
  {
    IDictionary[] dictionaries;
    ArrayList _values;
    ArrayList _keys;

    public AggregateDictionary (IDictionary[] dics)
    {
      dictionaries = dics;
    }

    public bool IsFixedSize
    {
      get { return true; }
    }

    public bool IsReadOnly
    {
      get { return true; }
    }

    public object this[object key]
    {
      get
      {
        foreach (IDictionary dic in dictionaries)
          if (dic.Contains (key)) return dic[key];
        return null;
      }

      set
      {
        foreach (IDictionary dic in dictionaries)
          if (dic.Contains (key))
            dic[key] = value;
      }
    }

    public ICollection Keys
    {
      get
      {
        if (_keys != null) return _keys;

        _keys = new ArrayList ();
        foreach (IDictionary dic in dictionaries)
          _keys.AddRange (dic.Keys);
        return _keys;
      }
    }

    public ICollection Values
    {
      get
      {
        if (_values != null) return _values;

        _values = new ArrayList ();
        foreach (IDictionary dic in dictionaries)
          _values.AddRange (dic.Values);
        return _values;
      }
    }

    public void Add (object key, object value)
    {
      throw new NotSupportedException ();
    }

    public void Clear ()
    {
      throw new NotSupportedException ();
    }

    public bool Contains (object ob)
    {
      foreach (IDictionary dic in dictionaries)
        if (dic.Contains (ob)) return true;
      return false;
    }

    public IDictionaryEnumerator GetEnumerator ()
    {
      return new AggregateEnumerator (dictionaries);
    }

    IEnumerator IEnumerable.GetEnumerator ()
    {
      return new AggregateEnumerator (dictionaries);
    }

    public void Remove (object ob)
    {
      throw new NotSupportedException ();
    }

    public void CopyTo (Array array, int index)
    {
      foreach (object ob in this)
        array.SetValue (ob, index++);
    }

    public int Count
    {
      get
      {
        int c = 0;
        foreach (IDictionary dic in dictionaries)
          c += dic.Count;
        return c;
      }
    }

    public bool IsSynchronized
    {
      get { return false; }
    }

    public object SyncRoot
    {
      get { return this; }
    }
  }

  internal class AggregateEnumerator : IDictionaryEnumerator
  {
    IDictionary[] dictionaries;
    int pos = 0;
    IDictionaryEnumerator currente;

    public AggregateEnumerator (IDictionary[] dics)
    {
      dictionaries = dics;
      Reset ();
    }

    public DictionaryEntry Entry
    {
      get { return currente.Entry; }
    }

    public object Key
    {
      get { return currente.Key; }
    }

    public object Value
    {
      get { return currente.Value; }
    }

    public object Current
    {
      get { return currente.Current; }
    }

    public bool MoveNext ()
    {
      if (pos >= dictionaries.Length) return false;

      if (!currente.MoveNext ()) {
        pos++;
        if (pos >= dictionaries.Length) return false;
        currente = dictionaries[pos].GetEnumerator ();
        return MoveNext ();
      }

      return true;
    }

    public void Reset ()
    {
      pos = 0;
      if (dictionaries.Length > 0)
        currente = dictionaries[0].GetEnumerator ();
    }
  }
}