49 lines
1.5 KiB
C#
49 lines
1.5 KiB
C#
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using System;
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namespace DynamicDescriptors;
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/// <summary>
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/// Provides internal precondition helper methods.
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/// </summary>
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internal static class Preconditions
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{
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/// <summary>
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/// Provides 'is not null' parameter validation.
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/// </summary>
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/// <typeparam name="T">The type of the parameter to validate.</typeparam>
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/// <param name="value">The value of the parameter.</param>
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/// <param name="parameterName">The name of the parameter.</param>
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/// <returns>The value of the parameter (if it was not null).</returns>
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public static T CheckNotNull<T>(T value, string parameterName)
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where T : class
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{
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if (value == null)
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{
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throw new ArgumentNullException(parameterName);
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}
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return value;
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}
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/// <summary>
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/// Provides 'is not null or an empty string' parameter validation.
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/// </summary>
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/// <param name="value">The value of the parameter.</param>
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/// <param name="parameterName">The name of the parameter.</param>
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/// <returns>The value of the parameter (if it was not null or empty).</returns>
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public static string CheckNotNullOrEmpty(string value, string parameterName)
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{
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if (value == null)
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{
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throw new ArgumentNullException(parameterName);
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}
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if (value.Length == 0)
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{
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throw new ArgumentException($"{parameterName} should be an empty string.", parameterName);
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}
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return value;
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}
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}
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