mirror of https://github.com/docker/cli.git
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 fields
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import (
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"sort"
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"strings"
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)
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// Fields allows you to present fields independently from their storage.
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type Fields interface {
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// Has returns whether the provided field exists.
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Has(field string) (exists bool)
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// Get returns the value for the provided field.
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Get(field string) (value string)
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}
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// Set is a map of field:value. It implements Fields.
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type Set map[string]string
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// String returns all fields listed as a human readable string.
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// Conveniently, exactly the format that ParseSelector takes.
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func (ls Set) String() string {
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selector := make([]string, 0, len(ls))
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for key, value := range ls {
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selector = append(selector, key+"="+value)
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}
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// Sort for determinism.
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sort.StringSlice(selector).Sort()
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return strings.Join(selector, ",")
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}
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// Has returns whether the provided field exists in the map.
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func (ls Set) Has(field string) bool {
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_, exists := ls[field]
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return exists
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}
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// Get returns the value in the map for the provided field.
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func (ls Set) Get(field string) string {
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return ls[field]
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}
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// AsSelector converts fields into a selectors.
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func (ls Set) AsSelector() Selector {
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return SelectorFromSet(ls)
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}
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