func()

in transforms.go [464:512]

• 44 lines of code
• 17 McCabe index (conditional complexity)

func (t TruncateTransform) Project(name string, pred BoundPredicate) (UnboundPredicate, error) {
	if _, ok := pred.Term().(*BoundTransform); ok {
		return projectTransformPredicate(t, name, pred)
	}

	fieldType := pred.Term().Ref().Field().Type

	transformer, err := t.Transformer(fieldType)
	if err != nil {
		return nil, err
	}

	switch p := pred.(type) {
	case BoundUnaryPredicate:
		return p.AsUnbound(Reference(name)), nil
	case BoundSetPredicate:
		if p.Op() != OpIn {
			break
		}

		switch fieldType.(type) {
		case Int32Type:
			return setApplyTransform(name, p, wrapTransformFn[int32](transformer)), nil
		case Int64Type:
			return setApplyTransform(name, p, wrapTransformFn[int64](transformer)), nil
		case DecimalType:
			return setApplyTransform(name, p, wrapTransformFn[Decimal](transformer)), nil
		case StringType:
			return setApplyTransform(name, p, wrapTransformFn[string](transformer)), nil
		case BinaryType:
			return setApplyTransform(name, p, wrapTransformFn[[]byte](transformer)), nil
		}
	case BoundLiteralPredicate:
		switch fieldType.(type) {
		case Int32Type:
			return truncateNumber(name, p, wrapTransformFn[int32](transformer))
		case Int64Type:
			return truncateNumber(name, p, wrapTransformFn[int64](transformer))
		case DecimalType:
			return truncateNumber(name, p, wrapTransformFn[Decimal](transformer))
		case StringType:
			return truncateArray(name, p, wrapTransformFn[string](transformer))
		case BinaryType:
			return truncateArray(name, p, wrapTransformFn[[]byte](transformer))
		}
	}

	return nil, nil
}