Lazy List : List « Collections Data Structure « C# / C Sharp

1. C# / C Sharp
2. Collections Data Structure
3. List

Lazy List

    
//New BSD License (BSD)

//http://bluecms.codeplex.com/license

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace BlueCMS.Core.Helpers
{
    public class LazyList<T> : IList<T>
    {

        public LazyList()
        {
            inner = new List<T>();
        }

        public LazyList(IQueryable<T> query)
        {
            this.query = query;
        }

        private IQueryable<T> query;
        private IList<T> inner;

        public int IndexOf(T item)
        {
            return Inner.IndexOf(item);
        }

        public void Insert(int index, T item)
        {
            Inner.Insert(index, item);
        }

        public void RemoveAt(int index)
        {
            Inner.RemoveAt(index);
        }

        public T this[int index]
        {
            get { return Inner[index]; }
            set { Inner[index] = value; }
        }

        public void Add(T item)
        {
            inner = inner ?? new List<T>();
            Inner.Add(item);
        }

        public void Add(object ob)
        {
            throw new NotImplementedException("This is for serialization");

        }

        public void Clear()
        {
            if (inner != null)
                Inner.Clear();
        }

        public bool Contains(T item)
        {
            return Inner.Contains(item);
        }

        public void CopyTo(T[] array, int arrayIndex)
        {
            Inner.CopyTo(array, arrayIndex);
        }

        public bool Remove(T item)
        {
            return Inner.Remove(item);
        }

        public int Count
        {
            get { return Inner.Count; }
        }

        public bool IsReadOnly
        {
            get { return Inner.IsReadOnly; }
        }

        IEnumerator<T> IEnumerable<T>.GetEnumerator()
        {
            return Inner.GetEnumerator();
        }

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

        public IList<T> Inner
        {
            get
            {
                if (inner == null)
                    inner = query.ToList();
                return inner;
            }
        }
    }
}

   
    
    
    
  

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