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68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
2 years ago
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/*
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Copyright 2020 The Compose Specification 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 tree
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import "strings"
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const pathSeparator = "."
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// PathMatchAll is a token used as part of a Path to match any key at that level
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// in the nested structure
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const PathMatchAll = "*"
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// PathMatchList is a token used as part of a Path to match items in a list
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const PathMatchList = "[]"
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// Path is a dotted path of keys to a value in a nested mapping structure. A *
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// section in a path will match any key in the mapping structure.
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type Path string
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// NewPath returns a new Path
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func NewPath(items ...string) Path {
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return Path(strings.Join(items, pathSeparator))
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}
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// Next returns a new path by append part to the current path
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func (p Path) Next(part string) Path {
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if p == "" {
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return Path(part)
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}
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return Path(string(p) + pathSeparator + part)
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}
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func (p Path) Parts() []string {
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return strings.Split(string(p), pathSeparator)
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}
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func (p Path) Matches(pattern Path) bool {
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patternParts := pattern.Parts()
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parts := p.Parts()
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if len(patternParts) != len(parts) {
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return false
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}
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for index, part := range parts {
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switch patternParts[index] {
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case PathMatchAll, part:
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continue
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default:
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return false
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}
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}
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return true
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}
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