func()

in transforms.go [258:312]

• 47 lines of code
• 13 McCabe index (conditional complexity)

func (t BucketTransform) Transformer(src Type) func(any) Optional[int32] {
	var h func(any) uint32

	switch src.(type) {
	case Int32Type:
		h = hashHelperInt[int32]
	case DateType:
		h = hashHelperInt[Date]
	case Int64Type:
		h = hashHelperInt[int64]
	case TimeType:
		h = hashHelperInt[Time]
	case TimestampType:
		h = hashHelperInt[Timestamp]
	case TimestampTzType:
		h = hashHelperInt[Timestamp]
	case DecimalType:
		h = func(v any) uint32 {
			b, _ := DecimalLiteral(v.(Decimal)).MarshalBinary()

			return murmur3.Sum32(b)
		}
	case StringType, FixedType, BinaryType:
		h = func(v any) uint32 {
			if v, ok := v.([]byte); ok {
				return murmur3.Sum32(v)
			}

			str := v.(string)

			return murmur3.Sum32(unsafe.Slice(unsafe.StringData(str), len(str)))
		}
	case UUIDType:
		h = func(v any) uint32 {
			if v, ok := v.([]byte); ok {
				return murmur3.Sum32(v)
			}

			u := v.(uuid.UUID)

			return murmur3.Sum32(u[:])
		}
	}

	return func(v any) Optional[int32] {
		if v == nil {
			return Optional[int32]{}
		}

		return Optional[int32]{
			Valid: true,
			Val:   int32((int32(h(v)) & math.MaxInt32) % int32(t.NumBuckets)),
		}
	}
}