context: //
  // System.Data.Common.DataColumnMappingCollection
  //
  // Authors:
  //   Rodrigo Moya (rodrigo@ximian.com)
  //   Tim Coleman (tim@timcoleman.com)
  //
  // (C) Ximian, Inc
  // Copyright (C) Tim Coleman, 2002-2003
  //
  
  //
  // Copyright (C) 2004 Novell, Inc (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.
  //
  
  using System;
  using System.Collections;
  using System.ComponentModel;
  using System.Data;
  
  namespace System.Data.Common
  {
  	public sealed class DataColumnMappingCollection : MarshalByRefObject, IColumnMappingCollection , IList, ICollection, IEnumerable
  	{
  		#region Fields
  
  		readonly ArrayList list;
  		readonly Hashtable sourceColumns;
  		readonly Hashtable dataSetColumns;
  
  		#endregion // Fields
  
  		#region Constructors 
  
  		public DataColumnMappingCollection ()
  		{
  			list = new ArrayList ();
  			sourceColumns = new Hashtable ();
  			dataSetColumns = new Hashtable ();
  		}
  
  		#endregion // Constructors
  
  		#region Properties
  
  		[Browsable (false)]
  #if !NET_2_0
  		[DataSysDescription ("The number of items in the collection")]
  #endif
  		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  		public int Count {
  			get { return list.Count; }
  		}
  
  		[Browsable (false)]
  #if !NET_2_0
  		[DataSysDescription ("The specified DataColumnMapping object.")]
  #endif
  		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  		public DataColumnMapping this [int index] {
  			get { return (DataColumnMapping)(list[index]); }
  			set { 
  				DataColumnMapping mapping = (DataColumnMapping)(list[index]);
  				sourceColumns[mapping] = value;
  				dataSetColumns[mapping] = value;
  				list[index] = value;
  			}
  		}
  
  		[Browsable (false)]
  #if !NET_2_0
  		[DataSysDescription ("The specified DataColumnMapping object.")]
  #endif
  		[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  		public DataColumnMapping this [string sourceColumn] {
  			get {
  				if (!Contains(sourceColumn))
  					throw new IndexOutOfRangeException("DataColumnMappingCollection doesn't contain DataColumnMapping with SourceColumn '" + sourceColumn + "'.");
  				return (DataColumnMapping) sourceColumns [sourceColumn];
  			}
  			set {
  				this [list.IndexOf (sourceColumns [sourceColumn])] = value;
  			}
  		}
  
  		object ICollection.SyncRoot {
  			get { return list.SyncRoot; }
  		}
  
  		bool ICollection.IsSynchronized {
  			get { return list.IsSynchronized; }
  		}
  
  		object IColumnMappingCollection.this [string index] {
  			get { return this [index]; }
  			set {
  				if (!(value is DataColumnMapping))
  					throw new ArgumentException ();
  				this [index] = (DataColumnMapping) value;
  			}
  		}
  
  		object IList.this [int index] {
  			get { return this [index]; }
  			set {
  				if (!(value is DataColumnMapping))
  					throw new ArgumentException ();
  				this [index] = (DataColumnMapping) value;
  			}
  		}
  
  		bool IList.IsReadOnly {
  			get { return false; }
  		}
  
  		bool IList.IsFixedSize {
  			get { return false; }
  		}
  		
  		#endregion // Properties
  
  		#region Methods
  
  		public int Add (object value)
  		{
  			if (!(value is DataColumnMapping))
  				throw new InvalidCastException ();
  
  			list.Add (value);
  			sourceColumns [((DataColumnMapping) value).SourceColumn] = value;
  			dataSetColumns [((DataColumnMapping )value).DataSetColumn] = value;
  			return list.IndexOf (value);
  		}
  
  		public DataColumnMapping Add (string sourceColumn, string dataSetColumn)
  		{
  			DataColumnMapping mapping = new DataColumnMapping (sourceColumn, dataSetColumn);
  			Add (mapping);
  			return mapping;
  		}
  
  #if NET_2_0
  		public void AddRange (Array values)
  		{
  			for (int i = 0; i < values.Length; ++i)
  				Add (values.GetValue (i));
  		}
  #endif
  
  		public void AddRange (DataColumnMapping[] values)
  		{
  			foreach (DataColumnMapping mapping in values)
  				Add (mapping);
  		}
  
  		public void Clear ()
  		{
  			list.Clear ();
  		}
  
  		public bool Contains (object value)
  		{
  			if (!(value is DataColumnMapping))
  				throw new InvalidCastException("Object is not of type DataColumnMapping");
  			return (list.Contains (value));
  		}
  
  		public bool Contains (string value)
  		{
  			return (sourceColumns.Contains (value));
  		}
  
  		public void CopyTo (Array array, int index)
  		{
  			list.CopyTo (array,index);
  		}
  
  #if NET_2_0
  		public void CopyTo (DataColumnMapping [] array, int index)
  		{
  			list.CopyTo (array, index);
  		}
  #endif
  
  		public DataColumnMapping GetByDataSetColumn (string value)
  		{
  			// this should work case-insenstive.
  			if (!(dataSetColumns [value] == null))
  				return (DataColumnMapping) (dataSetColumns [value]);
  			else {
  				string lowcasevalue = value.ToLower ();
  				object [] keyarray = new object [dataSetColumns.Count];
  				dataSetColumns.Keys.CopyTo (keyarray, 0);
  				for (int i = 0; i < keyarray.Length; i++) {
  					string temp = (string) keyarray [i];
  					if (lowcasevalue.Equals (temp.ToLower ()))
  						return (DataColumnMapping) (dataSetColumns [keyarray [i]]);
  				}
  				return null;
  			}
  		}
  
  		[EditorBrowsable (EditorBrowsableState.Advanced)]
  		public static DataColumnMapping GetColumnMappingBySchemaAction (DataColumnMappingCollection columnMappings, string sourceColumn, MissingMappingAction mappingAction)
  		{
  			if (columnMappings.Contains (sourceColumn))
  				return columnMappings[sourceColumn];
  			if (mappingAction == MissingMappingAction.Ignore)
  				return null;
  			if (mappingAction == MissingMappingAction.Error)
  				throw new InvalidOperationException (String.Format ("Missing SourceColumn mapping for '{0}'", sourceColumn));
  			return new DataColumnMapping (sourceColumn, sourceColumn);
  		}
  
  #if NET_2_0
  		[MonoTODO]
  		[EditorBrowsable (EditorBrowsableState.Advanced)]
  		public static DataColumn GetDataColumn (DataColumnMappingCollection columnMappings, string sourceColumn, Type dataType, DataTable dataTable, MissingMappingAction mappingAction, MissingSchemaAction schemaAction)
  		{
  			throw new NotImplementedException ();
  		}
  #endif
  
  		public IEnumerator GetEnumerator ()
  		{
  			return list.GetEnumerator ();
  		}
  
  		IColumnMapping IColumnMappingCollection.Add (string sourceColumnName, string dataSetColumnName)
  		{
  			return Add (sourceColumnName, dataSetColumnName);
  		}
  
  		IColumnMapping IColumnMappingCollection.GetByDataSetColumn (string dataSetColumnName)
  		{
  			return GetByDataSetColumn (dataSetColumnName);
  		}
  
  		public int IndexOf (object value)
  		{
  			return list.IndexOf (value);
  		}
  
  		public int IndexOf (string sourceColumn)
  		{
  			return list.IndexOf (sourceColumns [sourceColumn]);
  		}
  
  		public int IndexOfDataSetColumn (string dataSetColumn)
  		{
  			// this should work case-insensitive
  			if (!(dataSetColumns [dataSetColumn] == null))
  				return list.IndexOf (dataSetColumns [dataSetColumn]);
  			else {
  				string lowcasevalue = dataSetColumn.ToLower ();
  				object [] keyarray = new object[dataSetColumns.Count];
  				dataSetColumns.Keys.CopyTo (keyarray,0);
  				for (int i = 0; i < keyarray.Length; i++) {
  					string temp = (string) keyarray [i];
  					if (lowcasevalue.Equals (temp.ToLower ()))
  						return list.IndexOf (dataSetColumns [keyarray [i]]);
  				}
  				return -1;
  			}
  		}
  
  		public void Insert (int index, object value)
  		{
  			list.Insert (index, value);
  			sourceColumns [((DataColumnMapping) value).SourceColumn] = value;
  			dataSetColumns [((DataColumnMapping) value).DataSetColumn] = value;
  		}
  
  #if NET_2_0
  		public void Insert (int index, DataColumnMapping value)
  		{
  			list.Insert (index, value);
  
gt: 			sourceColumns [value.SourceColumn] = value;