mirror of https://github.com/knative/caching.git
126 lines
3.3 KiB
Go
126 lines
3.3 KiB
Go
/*
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Copyright 2020 The Knative 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 configmap
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import (
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"fmt"
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"strconv"
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"strings"
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"time"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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// ParseFunc is a function taking ConfigMap data and applying a parse operation to it.
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type ParseFunc func(map[string]string) error
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// AsString passes the value at key through into the target, if it exists.
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func AsString(key string, target *string) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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*target = raw
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}
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return nil
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}
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}
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// AsBool parses the value at key as a boolean into the target, if it exists.
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func AsBool(key string, target *bool) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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*target = strings.EqualFold(raw, "true")
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}
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return nil
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}
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}
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// AsInt32 parses the value at key as an int32 into the target, if it exists.
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func AsInt32(key string, target *int32) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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val, err := strconv.ParseInt(raw, 10, 32)
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if err != nil {
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return fmt.Errorf("failed to parse %q: %w", key, err)
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}
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*target = int32(val)
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}
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return nil
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}
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}
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// AsInt64 parses the value at key as an int64 into the target, if it exists.
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func AsInt64(key string, target *int64) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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val, err := strconv.ParseInt(raw, 10, 64)
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if err != nil {
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return fmt.Errorf("failed to parse %q: %w", key, err)
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}
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*target = val
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}
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return nil
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}
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}
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// AsFloat64 parses the value at key as a float64 into the target, if it exists.
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func AsFloat64(key string, target *float64) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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val, err := strconv.ParseFloat(raw, 64)
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if err != nil {
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return fmt.Errorf("failed to parse %q: %w", key, err)
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}
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*target = val
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}
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return nil
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}
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}
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// AsDuration parses the value at key as a time.Duration into the target, if it exists.
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func AsDuration(key string, target *time.Duration) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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val, err := time.ParseDuration(raw)
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if err != nil {
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return fmt.Errorf("failed to parse %q: %w", key, err)
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}
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*target = val
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}
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return nil
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}
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}
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// AsStringSet parses the value at key as a sets.String (split by ',') into the target, if it exists.
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func AsStringSet(key string, target *sets.String) ParseFunc {
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return func(data map[string]string) error {
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if raw, ok := data[key]; ok {
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*target = sets.NewString(strings.Split(raw, ",")...)
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}
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return nil
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}
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}
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// Parse parses the given map using the parser functions passed in.
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func Parse(data map[string]string, parsers ...ParseFunc) error {
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for _, parse := range parsers {
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if err := parse(data); err != nil {
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return err
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}
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}
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return nil
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}
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