???using System;
using System.Collections;
using System.Collections.Generic;

namespace UCIS.Pml {
	public class PmlCollection : PmlElement, ICollection<PmlElement> {
			private List<PmlElement> pItems = new List<PmlElement>();

			public PmlCollection() { }
			public PmlCollection(params PmlElement[] Elements) {
				pItems.AddRange(Elements);
			}
			public PmlCollection(IEnumerable<PmlElement> Elements) {
				pItems.AddRange(Elements);
			}
			public PmlCollection(params String[] Elements) {
				foreach (String s in Elements) pItems.Add(s);
			}

			public PmlElement Add(PmlElement Element) {
				pItems.Add(Element);
				return Element;
			}
			public void Remove(PmlElement Element) {
				pItems.Remove(Element);
			}
			public void RemoveAt(int Index) {
				pItems.RemoveAt(Index);
			}
			public void Clear() {
				pItems.Clear();
			}
			public bool Contains(PmlElement item) {
				return pItems.Contains(item);
			}
			public void CopyTo(PmlElement[] array, int arrayIndex) {
				pItems.CopyTo(array, arrayIndex);
			}
			public int Count { 				get { return pItems.Count; } 			}
			public bool IsReadOnly { 				get { return false; } 			}
			public IEnumerator<PmlElement> GetEnumerator() { 				return pItems.GetEnumerator(); 			}
			IEnumerator IEnumerable.GetEnumerator() { 				return pItems.GetEnumerator(); 			}
			bool ICollection<PmlElement>.Remove(PmlElement item) { 				return pItems.Remove(item); 			}
			void ICollection<PmlElement>.Add(PmlElement item) { 				Add(item); 			}

			public override PmlType Type { get { return PmlType.Collection; } }

			public override object ToObject() { return pItems; }
			public override string ToString() { return null; }
			public override bool ToBoolean() { return pItems.Count > 0; }
			public override byte ToByte() { return (Byte)pItems.Count; }
			public override decimal ToDecimal() { return pItems.Count; }
			public override double ToDouble() { return pItems.Count; }
			public override short ToInt16() { return (Int16)pItems.Count; }
			public override int ToInt32() { return pItems.Count; }
			public override long ToInt64() { return pItems.Count; }
			public override sbyte ToSByte() { return (SByte)pItems.Count; }
			public override float ToSingle() { return pItems.Count; }
			public override ushort ToUInt16() { return (UInt16)pItems.Count; }
			public override uint ToUInt32() { return (UInt32)pItems.Count; }
			public override ulong ToUInt64() { return (UInt64)pItems.Count; }
			public override char ToChar() { return '\0'; }
			public override byte[] ToByteArray() { return null; }

			//public override PmlElement GetChild(string name) { return GetChild(name); }
			public override PmlElement GetChild(int index) { return pItems[index]; }
			public override IEnumerable<PmlElement> GetChildren() { return pItems; }
			public override IEnumerable<KeyValuePair<String, PmlElement>> GetNamedChildren() {
				KeyValuePair<String, PmlElement>[] kvps = new KeyValuePair<string, PmlElement>[pItems.Count];
				for (int i = 0; i < kvps.Length; i++) kvps[i] = new KeyValuePair<string,PmlElement>(null, pItems[i]);
				return kvps;
			}
			public override int GetChildCount() { return pItems.Count; }
			public override void AddChild(string name, PmlElement value) { Add(value); }
			public override void AddChild(PmlElement value) { Add(value); }
	}
}