93 lines
2.8 KiB
Go
93 lines
2.8 KiB
Go
/*
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Copyright 2018 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 selectors
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import (
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"github.com/ghodss/yaml"
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p "k8s.io/kubectl/pkg/framework/path/predicates"
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)
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// This example is inspired from http://goessner.net/articles/JsonPath/#e3.
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func Example() {
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data := `{ "store": {
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"book": [
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{ "category": "reference",
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"author": "Nigel Rees",
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"title": "Sayings of the Century",
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"price": 8.95
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},
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{ "category": "fiction",
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"author": "Evelyn Waugh",
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"title": "Sword of Honour",
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"price": 12.99
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},
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{ "category": "fiction",
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"author": "Herman Melville",
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"title": "Moby Dick",
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"isbn": "0-553-21311-3",
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"price": 8.99
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},
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{ "category": "fiction",
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"author": "J. R. R. Tolkien",
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"title": "The Lord of the Rings",
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"isbn": "0-395-19395-8",
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"price": 22.99
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}
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],
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"bicycle": {
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"color": "red",
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"price": 19.95
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}
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}
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}`
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u := map[string]interface{}{}
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if err := yaml.Unmarshal([]byte(data), &u); err != nil {
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panic(err)
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}
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// The authors of all books in the store. Returns a list of strings.
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Children().Field("book").Children().Field("author").AsString().SelectFrom(u)
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// All authors. Returns a list of strings.
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All().Field("author").AsString().SelectFrom(u)
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// All things in store, which are some books and a red bicycle. Returns a list of maps.
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Field("store").Children().AsMap().SelectFrom(u)
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// The price of everything in the store. Returns a list of "float64".
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Field("store").All().Field("price").AsNumber().SelectFrom(u)
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// The third book. Returns a list of 1 interface{}.
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All().Field("book").At(2).SelectFrom(u)
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// The last book in order. Return a list of 1 interface{}.
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All().Field("book").Last().SelectFrom(u)
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// The first two books. Returns a list of 2 interface{}.
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All().Field("book").AtP(p.NumberLessThan(2)).SelectFrom(u)
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// Filter all books with isbn number. Returns a list of interface{}.
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All().Field("book").Filter(Field("isbn")).SelectFrom(u)
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// Filter all books cheaper than 10. Returns a list of interface{}.
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All().Field("book").Children().Filter(Field("price").AsNumber().Filter(p.NumberLessThan(10))).SelectFrom(u)
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// All elements in structure. Returns a list of interface{}.
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All().SelectFrom(u)
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}
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