65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
// Licensed to Pulumi Corporation ("Pulumi") under one or more
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// contributor license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership.
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// Pulumi licenses this file to You under the Apache License, Version 2.0
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// (the "License"); you may not use this file except in compliance with
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// the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package encoding
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// StringSlice 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. A copy may be made if needed.
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func StringSlice(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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// StringStringMap checks a weakly typed interface ptr to see if it's a map[string]string; if yes, the result is
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// returned with a "true"; otherwise, nil with a "false" is returned. A copy may be made if needed.
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func StringStringMap(i interface{}) (map[string]string, bool) {
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// First try a direct conversion.
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if ssm, ok := i.(map[string]string); ok {
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return ssm, true
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}
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// Otherwise, see if the keys are strings but the value type itself is unknown.
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if sim, ok := i.(map[string]interface{}); ok {
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ssm := make(map[string]string)
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for k, v := range sim {
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if s, ok := v.(string); ok {
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ssm[k] = 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 ssm, true
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}
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return nil, false
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}
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