64 lines
1.7 KiB
C#
64 lines
1.7 KiB
C#
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namespace JiShe.CollectBus.IoTDB.Options
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{
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/// <summary>
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/// 查询条件
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/// </summary>
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public class QueryCondition
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{
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/// <summary>
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/// 字段
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/// </summary>
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public string Field { get; set; }
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/// <summary>
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/// 操作符,>，=，<
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/// </summary>
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public string Operator { get; set; }
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/// <summary>
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/// 是否数值，如果是数值，则进行数值比较，否则进行字符串比较
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/// </summary>
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public bool IsNumber { get; set; } = false;
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private object _rawValue;
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/// <summary>
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/// 值
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/// </summary>
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public object Value
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{
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get => ApplyValueConversion(_rawValue);
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set => _rawValue = value;
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}
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/// <summary>
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/// 值转换
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/// </summary>
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/// <param name="rawValue"></param>
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/// <returns></returns>
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private object ApplyValueConversion(object rawValue)
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{
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string declaredTypeName = rawValue.GetType().Name;
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Func<object, object> converter = GetQueryConditionValue(declaredTypeName);
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return converter(rawValue);
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}
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/// <summary>
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/// 查询条件值转换委托
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/// </summary>
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/// <param name="declaredTypeName"></param>
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/// <returns></returns>
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private Func<object, object> GetQueryConditionValue(string declaredTypeName)
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{
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return declaredTypeName?.ToUpper() switch
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{
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"DATETIME" => v => v != null ? ((DateTime)v).ToUniversalTime().Ticks : null,
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"STRING" => v => v != null ? $"'{v}'" : "''",
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_ => v => v
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};
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}
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}
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}
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