rest/plugins/sharding/condition.go

package sharding

const (
	ValueOperaEqual = iota + 0x10
	ValueOperaGreater
	ValueOperaLess
	ValueOperaRange

	ValueTypeString = iota + 0x30
	ValueTypeNumber
	ValueTypeBoolean
	ValueTypeNull
	ValueTypeAny
)

type (
	ColumnCondition struct {
		Name  string    `json:"name"`
		Value CondValue `json:"value"`
	}

	CondValue interface {
		Type() int
		Opera() int
		Value() any
	}

	equalValue struct {
		vType int
		vData any
	}

	rangeValue struct {
		vType int
		vData any
	}

	greaterValue struct {
		vType int
		vData any
	}

	lessValue struct {
		vType int
		vData any
	}
)

func (v *lessValue) Type() int {
	return v.vType
}

func (v *lessValue) Opera() int {
	return ValueOperaLess
}

func (v *lessValue) Value() any {
	return v.vData
}

func (v *greaterValue) Type() int {
	return v.vType
}

func (v *greaterValue) Opera() int {
	return ValueOperaGreater
}

func (v *greaterValue) Value() any {
	return v.vData
}

func (v *rangeValue) Type() int {
	return v.vType
}

func (v *rangeValue) Opera() int {
	return ValueOperaRange
}

func (v *rangeValue) Value() any {
	return v.vData
}

func (v *equalValue) Type() int {
	return v.vType
}

func (v *equalValue) Opera() int {
	return ValueOperaEqual
}

func (v *equalValue) Value() any {
	return v.vData
}

func newCondValue(vType int, op int, value any) CondValue {
	switch op {
	case ValueOperaGreater:
		return &greaterValue{
			vType: vType,
			vData: value,
		}
	case ValueOperaLess:
		return &lessValue{
			vType: vType,
			vData: value,
		}
	case ValueOperaRange:
		return &rangeValue{
			vType: vType,
			vData: value,
		}
	default:
		return &equalValue{
			vType: vType,
			vData: value,
		}
	}
}