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

namespace System.Data.SQLite
{

 public class SQLiteColumnList : IList<SQLiteColumn>
 {
 List<SQLiteColumn> _lst = new List<SQLiteColumn>();

 private void CheckColumnName(string colName)
 {
 for (int i = 0; i < _lst.Count; i++)
 {
 if (_lst[i].ColumnName == colName)
 throw new Exception("Column name of \"" + colName + "\" is already existed.");
 }
 }

 public int IndexOf(SQLiteColumn item)
 {
 return _lst.IndexOf(item);
 }

 public void Insert(int index, SQLiteColumn item)
 {
 CheckColumnName(item.ColumnName);

 _lst.Insert(index, item);
 }

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

 public SQLiteColumn this[int index]
 {
 get
 {
 return _lst[index];
 }
 set
 {
 if (_lst[index].ColumnName != value.ColumnName)
 {
 CheckColumnName(value.ColumnName);
 }

 _lst[index] = value;
 }
 }

 public void Add(SQLiteColumn item)
 {
 CheckColumnName(item.ColumnName);

 _lst.Add(item);
 }

 public void Clear()
 {
 _lst.Clear();
 }

 public bool Contains(SQLiteColumn item)
 {
 return _lst.Contains(item);
 }

 public void CopyTo(SQLiteColumn[] array, int arrayIndex)
 {
 _lst.CopyTo(array, arrayIndex);
 }

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

 public bool IsReadOnly
 {
 get { return false; }
 }

 public bool Remove(SQLiteColumn item)
 {
 return _lst.Remove(item);
 }

 public IEnumerator<SQLiteColumn> GetEnumerator()
 {
 return _lst.GetEnumerator();
 }

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

}