90 lines
2.8 KiB
C#
90 lines
2.8 KiB
C#
/********************************************************************++
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Copyright (c) Microsoft Corporation. All rights reserved.
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--********************************************************************/
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using System.Management.Automation;
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namespace Microsoft.PowerShell.Commands
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{
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/// <summary>
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///
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/// </summary>
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[Cmdlet("Sort", "Object", HelpUri = "http://go.microsoft.com/fwlink/?LinkID=113403", RemotingCapability = RemotingCapability.None)]
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public sealed class SortObjectCommand : OrderObjectBase
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{
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#region Command Line Switches
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/// <summary>
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/// This param specifies if sort order is ascending.
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/// </summary>
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[Parameter]
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public SwitchParameter Descending
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{
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get { return DescendingOrder; }
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set { DescendingOrder = value; }
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}
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/// <summary>
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///
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/// </summary>
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/// <value></value>
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[Parameter]
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public SwitchParameter Unique
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{
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get { return unique; }
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set { unique = value; }
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}
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private bool unique;
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#endregion
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/// <summary>
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/// Remove Duplicated from <paramref name="sortedList"/>
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/// </summary>
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private static void RemoveDuplicates(OrderByProperty orderByProperty)
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{
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int current = 0, lookAhead;
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OrderByPropertyEntry currentObj = orderByProperty.OrderMatrix[current];
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while (current + 1 < orderByProperty.OrderMatrix.Count)
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{
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lookAhead = current + 1;
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OrderByPropertyEntry lookAheadObj = orderByProperty.OrderMatrix[lookAhead];
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if (orderByProperty.Comparer.Compare(currentObj, lookAheadObj) == 0)
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{
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orderByProperty.OrderMatrix.RemoveAt(lookAhead);
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}
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else
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{
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current = lookAhead;
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currentObj = lookAheadObj;
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}
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}
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}
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/// <summary>
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///
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/// </summary>
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protected override void EndProcessing()
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{
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OrderByProperty orderByProperty = new OrderByProperty(
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this, InputObjects, Property, !Descending, ConvertedCulture, CaseSensitive);
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if (orderByProperty.Comparer == null || orderByProperty.OrderMatrix == null || orderByProperty.OrderMatrix.Count == 0)
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{
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return;
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}
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orderByProperty.OrderMatrix.Sort(orderByProperty.Comparer);
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if (unique)
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{
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RemoveDuplicates(orderByProperty);
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}
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// write to output stream
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foreach (OrderByPropertyEntry x in orderByProperty.OrderMatrix)
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{
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WriteObject(x.inputObject);
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}
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}
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}
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}
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