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63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package fieldpath
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import (
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"fmt"
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"strings"
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"k8s.io/apimachinery/pkg/api/meta"
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)
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// FormatMap formats map[string]string to a string.
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func FormatMap(m map[string]string) (fmtStr string) {
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for key, value := range m {
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fmtStr += fmt.Sprintf("%v=%q\n", key, value)
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}
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fmtStr = strings.TrimSuffix(fmtStr, "\n")
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return
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}
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// ExtractFieldPathAsString extracts the field from the given object
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// and returns it as a string. The object must be a pointer to an
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// API type.
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//
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// Currently, this API is limited to supporting the fieldpaths:
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//
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// 1. metadata.name - The name of an API object
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// 2. metadata.namespace - The namespace of an API object
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func ExtractFieldPathAsString(obj interface{}, fieldPath string) (string, error) {
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return "", nil
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}
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switch fieldPath {
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case "metadata.annotations":
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return FormatMap(accessor.GetAnnotations()), nil
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case "metadata.labels":
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return FormatMap(accessor.GetLabels()), nil
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case "metadata.name":
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return accessor.GetName(), nil
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case "metadata.namespace":
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return accessor.GetNamespace(), nil
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}
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return "", fmt.Errorf("unsupported fieldPath: %v", fieldPath)
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}
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