2c0b3da5de
* Enhance null-safety annotations across modules and refactor for improved consistency: - Added `null!` annotations to enforce non-nullability expectations. - Updated workflows, tests, and runtime services to handle default null values reliably. - Removed obsolete and unused APIs, simplifying interfaces and improving maintainability. - Refactored methods and properties for clarity, thread-safety, and consistency. - Adjusted test configurations for code coverage tracking and integration improvements. * Refactor activity iteration in container serialization tests to simplify type casting.
49 lines
1.4 KiB
C#
49 lines
1.4 KiB
C#
using System.Text.Json;
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using Microsoft.EntityFrameworkCore.ChangeTracking;
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namespace Elsa.Persistence.EFCore;
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/// <summary>
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/// Compares two objects.
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/// Required to make EF Core change tracking work for complex value converted objects.
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/// </summary>
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/// <remarks>
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/// For objects that implement <see cref="ICloneable"/> and <see cref="IEquatable{T}"/>,
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/// those implementations will be used for cloning and equality.
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/// For plain objects, fall back to deep equality comparison using JSON serialization
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/// (safe, but inefficient).
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/// </remarks>
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public class JsonValueComparer<T>() : ValueComparer<T>((t1, t2) => DoEquals(t1!, t2!),
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t => DoGetHashCode(t),
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t => DoGetSnapshot(t))
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{
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private static string Json(T instance) {
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return JsonSerializer.Serialize(instance);
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}
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private static T DoGetSnapshot(T instance) {
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if (instance is ICloneable cloneable)
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return (T)cloneable.Clone();
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return JsonSerializer.Deserialize<T>(Json(instance))!;
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}
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private static int DoGetHashCode(T instance) {
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if (instance is IEquatable<T>)
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return instance.GetHashCode();
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return Json(instance).GetHashCode();
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}
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private static bool DoEquals(T left, T right) {
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if (left is IEquatable<T> equatable)
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return equatable.Equals(right);
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return Json(left).Equals(Json(right));
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}
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} |