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85 lines
No EOL
2.9 KiB
C#
85 lines
No EOL
2.9 KiB
C#
// LumenWorks.Framework.IO.CSV.CachedCsvReader.CsvRecordComparer
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// Copyright (c) 2006 Sébastien Lorion
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//
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// MIT license (http://en.wikipedia.org/wiki/MIT_License)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using Debug = System.Diagnostics.Debug;
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using System.Globalization;
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namespace LumenWorks.Framework.IO.Csv
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{
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public partial class CachedCsvReader
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: CsvReader
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{
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/// <summary>
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/// Represents a CSV record comparer.
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/// </summary>
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private class CsvRecordComparer
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: IComparer<string[]>
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{
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#region Fields
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/// <summary>
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/// Contains the field index of the values to compare.
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/// </summary>
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private int _field;
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/// <summary>
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/// Contains the sort direction.
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/// </summary>
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private ListSortDirection _direction;
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#endregion
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the CsvRecordComparer class.
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/// </summary>
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/// <param name="field">The field index of the values to compare.</param>
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/// <param name="direction">The sort direction.</param>
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public CsvRecordComparer(int field, ListSortDirection direction)
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{
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if (field < 0)
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throw new ArgumentOutOfRangeException("field", field, string.Format(CultureInfo.InvariantCulture, Resources.ExceptionMessage.FieldIndexOutOfRange, field));
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_field = field;
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_direction = direction;
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}
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#endregion
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#region IComparer<string[]> Members
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public int Compare(string[] x, string[] y)
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{
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Debug.Assert(x != null && y != null && x.Length == y.Length && _field < x.Length);
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int result = String.Compare(x[_field], y[_field], StringComparison.CurrentCulture);
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return (_direction == ListSortDirection.Ascending ? result : -result);
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}
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#endregion
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}
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}
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} |