72 lines
1.5 KiB
C#
72 lines
1.5 KiB
C#
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#if NET5_0_OR_GREATER
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using Microsoft.Extensions.DependencyInjection;
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#endif
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namespace BITKit.Packages.Core.LazyLoad
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{
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public interface ILazyLoad
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{
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bool IsLoaded { get; }
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}
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public interface ILazyLoad<T> : ILazyLoad
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{
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T Value { get; }
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bool TryGetValue(ref T value);
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}
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public abstract class LazyLoad<T> : ILazyLoad<T>
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{
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public bool IsLoaded
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{
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get
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{
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if (_value is null)
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Load();
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return _value is not null;
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}
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}
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private T _value;
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public T Value
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{
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get
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{
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if (_value is null)
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Load();
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return _value;
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}
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protected set => _value = value;
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}
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public bool TryGetValue(ref T value)
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{
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if (IsLoaded)
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{
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value = Value;
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return true;
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}
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Load();
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return false;
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}
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protected abstract void Load();
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}
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#if NET5_0_OR_GREATER
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public class ServiceLoader<T> : LazyLoad<T>
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{
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protected override void Load()
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{
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if (BITApp.ServiceProvider is null) return;
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if (BITApp.ServiceCollection is null) return;
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var service = BITApp.ServiceProvider.GetService<T>();
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if (service is null) return;
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Value = service;
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}
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}
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#endif
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}
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