60 lines
1.4 KiB
C#
60 lines
1.4 KiB
C#
using System;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Text;
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using zero.Core.Entities;
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using zero.Core.Extensions;
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namespace zero.Core.Blueprints
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{
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public class BlueprintField<T> where T : ZeroEntity
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{
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public Expression<Func<T, object>> Expression { get; private set; }
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public PropertyInfo PropertyInfo { get; private set; }
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public string FieldName { get; private set; }
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Action<T, T> _applyHook { get; set; }
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Func<T, object> _selectorFunc = null;
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internal BlueprintField(Expression<Func<T, object>> selector)
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{
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Expression = selector;
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FieldName = selector.GetPropertyPath(out MemberExpression member);
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PropertyInfo = member?.Member as PropertyInfo;
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if (PropertyInfo == null)
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{
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throw new ArgumentException("selector parameter has to be a property selector");
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}
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if (FieldName.IsNullOrEmpty())
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{
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throw new Exception("Could not find a matching field name");
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}
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}
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public virtual void Apply(T blueprint, T model)
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{
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if (_applyHook != null)
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{
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_applyHook(blueprint, model);
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return;
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}
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_selectorFunc ??= Expression.Compile();
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PropertyInfo.SetValue(model, _selectorFunc(blueprint));
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}
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public virtual void OnUpdate(Action<T, T> onUpdate)
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{
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_applyHook = onUpdate;
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}
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}
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}
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