5976abc9d8
The prior code could miss arrays of strings during conversion because
the arrays created by the various marshalers are weakly typed. In other
words, even though they contain strings, the array type is []interface{}.
This change introduces the encoding.ArrayOfStrings function to perform
this conversion, first by checking for []string and returning that directly
where possible, and second, if that fails, checking each element and copying.
28 lines
720 B
Go
28 lines
720 B
Go
// Copyright 2016 Marapongo, Inc. All rights reserved.
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package encoding
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// ArrayOfStrings checks a weakly typed interface ptr to see if it's a []string; if yes, the resulting converted array
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// is returned with a "true"; otherwise, nil with a "false" is returned.
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func ArrayOfStrings(i interface{}) ([]string, bool) {
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// First try a direct conversion.
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if s, ok := i.([]string); ok {
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return s, true
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}
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// Otherwise, see if it's an untyped array, and then convert each element.
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if a, ok := i.([]interface{}); ok {
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ss := make([]string, 0, len(a))
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for _, e := range a {
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if s, ok := e.(string); ok {
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ss = append(ss, s)
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} else {
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return nil, false
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}
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}
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return ss, true
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}
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return nil, false
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}
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