57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
package validator
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import (
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"encoding/json"
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"reflect"
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)
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// FloatType makes the "float" (or "float64") type available in the aicra configuration
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// It considers valid:
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// - float64
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// - int (since it does not overflow)
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// - uint (since it does not overflow)
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// - strings containing json-compatible floats
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// - []byte containing json-compatible floats
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type FloatType struct{}
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// GoType returns the `float64` type
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func (FloatType) GoType() reflect.Type {
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return reflect.TypeOf(float64(0))
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}
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// Validator for float64 values
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func (FloatType) Validator(typename string, avail ...Type) ValidateFunc {
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if typename != "float64" && typename != "float" {
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return nil
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}
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return func(value interface{}) (interface{}, bool) {
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switch cast := value.(type) {
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case int:
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return float64(cast), true
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case uint:
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return float64(cast), true
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case float64:
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return cast, true
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// serialized string -> try to convert to float
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case []byte:
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num := json.Number(cast)
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floatVal, err := num.Float64()
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return floatVal, err == nil
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case string:
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num := json.Number(cast)
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floatVal, err := num.Float64()
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return floatVal, err == nil
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// unknown type
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default:
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return 0, false
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}
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}
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}
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