mirror of
https://github.com/prometheus/prometheus.git
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114 lines
3.1 KiB
Go
114 lines
3.1 KiB
Go
/*
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Copyright 2014 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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// Defines conversions between generic types and structs to map query strings
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// to struct objects.
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package runtime
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import (
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"fmt"
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"reflect"
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"strconv"
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"strings"
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"k8s.io/apimachinery/pkg/conversion"
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)
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// DefaultFieldSelectorConversion auto-accepts metav1 values for name and namespace.
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// A cluster scoped resource specifying namespace empty works fine and specifying a particular
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// namespace will return no results, as expected.
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func DefaultMetaV1FieldSelectorConversion(label, value string) (string, string, error) {
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switch label {
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case "metadata.name":
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return label, value, nil
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case "metadata.namespace":
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return label, value, nil
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default:
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return "", "", fmt.Errorf("%q is not a known field selector: only %q, %q", label, "metadata.name", "metadata.namespace")
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}
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}
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// JSONKeyMapper uses the struct tags on a conversion to determine the key value for
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// the other side. Use when mapping from a map[string]* to a struct or vice versa.
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func JSONKeyMapper(key string, sourceTag, destTag reflect.StructTag) (string, string) {
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if s := destTag.Get("json"); len(s) > 0 {
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return strings.SplitN(s, ",", 2)[0], key
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}
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if s := sourceTag.Get("json"); len(s) > 0 {
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return key, strings.SplitN(s, ",", 2)[0]
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}
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return key, key
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}
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// DefaultStringConversions are helpers for converting []string and string to real values.
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var DefaultStringConversions = []interface{}{
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Convert_Slice_string_To_string,
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Convert_Slice_string_To_int,
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Convert_Slice_string_To_bool,
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Convert_Slice_string_To_int64,
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}
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func Convert_Slice_string_To_string(input *[]string, out *string, s conversion.Scope) error {
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if len(*input) == 0 {
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*out = ""
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}
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*out = (*input)[0]
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return nil
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}
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func Convert_Slice_string_To_int(input *[]string, out *int, s conversion.Scope) error {
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if len(*input) == 0 {
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*out = 0
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}
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str := (*input)[0]
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i, err := strconv.Atoi(str)
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if err != nil {
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return err
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}
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*out = i
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return nil
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}
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// Conver_Slice_string_To_bool will convert a string parameter to boolean.
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// Only the absence of a value, a value of "false", or a value of "0" resolve to false.
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// Any other value (including empty string) resolves to true.
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func Convert_Slice_string_To_bool(input *[]string, out *bool, s conversion.Scope) error {
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if len(*input) == 0 {
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*out = false
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return nil
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}
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switch strings.ToLower((*input)[0]) {
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case "false", "0":
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*out = false
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default:
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*out = true
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}
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return nil
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}
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func Convert_Slice_string_To_int64(input *[]string, out *int64, s conversion.Scope) error {
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if len(*input) == 0 {
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*out = 0
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}
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str := (*input)[0]
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i, err := strconv.ParseInt(str, 10, 64)
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if err != nil {
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return err
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}
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*out = i
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return nil
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}
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