46 lines
1.5 KiB
Go
46 lines
1.5 KiB
Go
|
// Copyright (C) MongoDB, Inc. 2017-present.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may
|
||
|
|
// not use this file except in compliance with the License. You may obtain
|
||
|
|
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
package internal
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"go.mongodb.org/mongo-driver/bson"
|
||
|
|
)
|
||
|
|
|
||
|
|
// StringSliceFromRawElement decodes the provided BSON element into a []string. This internally calls
|
||
|
|
// StringSliceFromRawValue on the element's value. The error conditions outlined in that function's documentation
|
||
|
|
// apply for this function as well.
|
||
|
|
func StringSliceFromRawElement(element bson.RawElement) ([]string, error) {
|
||
|
|
return StringSliceFromRawValue(element.Key(), element.Value())
|
||
|
|
}
|
||
|
|
|
||
|
|
// StringSliceFromRawValue decodes the provided BSON value into a []string. This function returns an error if the value
|
||
|
|
// is not an array or any of the elements in the array are not strings. The name parameter is used to add context to
|
||
|
|
// error messages.
|
||
|
|
func StringSliceFromRawValue(name string, val bson.RawValue) ([]string, error) {
|
||
|
|
arr, ok := val.ArrayOK()
|
||
|
|
if !ok {
|
||
|
|
return nil, fmt.Errorf("expected '%s' to be an array but it's a BSON %s", name, val.Type)
|
||
|
|
}
|
||
|
|
|
||
|
|
arrayValues, err := arr.Values()
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
strs := make([]string, 0, len(arrayValues))
|
||
|
|
for _, arrayVal := range arrayValues {
|
||
|
|
str, ok := arrayVal.StringValueOK()
|
||
|
|
if !ok {
|
||
|
|
return nil, fmt.Errorf("expected '%s' to be an array of strings, but found a BSON %s", name, arrayVal.Type)
|
||
|
|
}
|
||
|
|
strs = append(strs, str)
|
||
|
|
}
|
||
|
|
return strs, nil
|
||
|
|
}
|