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8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System.Collections.Generic;
using System.Management.Automation;
namespace Microsoft.PowerShell.Commands
{
internal sealed class ExpressionColumnInfo : ColumnInfo
{
private readonly PSPropertyExpression _expression;
internal ExpressionColumnInfo(string staleObjectPropertyName, string displayName, PSPropertyExpression expression)
: base(staleObjectPropertyName, displayName)
{
_expression = expression;
}
internal override object GetValue(PSObject liveObject)
{
List<PSPropertyExpressionResult> resList = _expression.GetValues(liveObject);
if (resList.Count == 0)
{
return null;
}
// Only first element is used.
PSPropertyExpressionResult result = resList[0];
if (result.Exception != null)
{
return null;
}
object objectResult = result.Result;
return objectResult == null ? string.Empty : ColumnInfo.LimitString(objectResult.ToString());
}
}
}
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