58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package conditions
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import "fmt"
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// Fields represents an arbitrary map in a config file.
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type Fields struct {
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fields map[string]interface{}
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}
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// Unpack unpacks nested fields set with dot notation like foo.bar into the proper nesting
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// in a nested map/slice structure.
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func (f *Fields) Unpack(to interface{}) error {
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m, ok := to.(map[string]interface{})
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if !ok {
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return fmt.Errorf("wrong type, expect map")
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}
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f.fields = map[string]interface{}{}
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var expand func(key string, value interface{})
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expand = func(key string, value interface{}) {
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switch v := value.(type) {
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case map[string]interface{}:
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for k, val := range v {
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expand(fmt.Sprintf("%v.%v", key, k), val)
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}
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case []interface{}:
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for i := range v {
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expand(fmt.Sprintf("%v.%v", key, i), v[i])
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}
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default:
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f.fields[key] = value
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}
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}
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for k, val := range m {
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expand(k, val)
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}
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return nil
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}
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