zeroframework/Services/DeviceCenter/ZeroFramework.DeviceCenter.Domain/Specifications/IncludeExpressionInfo.cs

using System.Linq.Expressions;

namespace ZeroFramework.DeviceCenter.Domain.Specifications
{
    public class IncludeExpressionInfo
    {
        public LambdaExpression LambdaExpression { get; }

        public Type EntityType { get; }

        public Type PropertyType { get; }

        public Type? PreviousPropertyType { get; }

        public IncludeTypeEnum Type { get; }

        private IncludeExpressionInfo(LambdaExpression expression, Type entityType, Type propertyType, Type? previousPropertyType, IncludeTypeEnum includeType)
        {
            _ = expression ?? throw new ArgumentNullException(nameof(expression));
            _ = entityType ?? throw new ArgumentNullException(nameof(entityType));
            _ = propertyType ?? throw new ArgumentNullException(nameof(propertyType));

            if (includeType == IncludeTypeEnum.ThenInclude)
            {
                _ = previousPropertyType ?? throw new ArgumentNullException(nameof(previousPropertyType));
            }

            LambdaExpression = expression;
            EntityType = entityType;
            PropertyType = propertyType;
            PreviousPropertyType = previousPropertyType;
            Type = includeType;
        }

        public IncludeExpressionInfo(LambdaExpression expression, Type entityType, Type propertyType)
            : this(expression, entityType, propertyType, null, IncludeTypeEnum.Include)
        {
        }

        public IncludeExpressionInfo(LambdaExpression expression, Type entityType, Type propertyType, Type previousPropertyType)
            : this(expression, entityType, propertyType, previousPropertyType, IncludeTypeEnum.ThenInclude)
        {
        }
    }
}