92 lines
2.5 KiB
Go
92 lines
2.5 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 unstructpath
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import (
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p "k8s.io/kubectl/pkg/framework/predicates"
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)
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// A valueFilter allows us to chain ValueS to ValueS. None of this is
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// public. It's implementing the "SelectFrom" part of a ValueS.
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type valueFilter interface {
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SelectFrom(...interface{}) []interface{}
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}
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// valueFilterP filters using a predicate.
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type valueFilterP struct {
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vp p.Value
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}
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func (f *valueFilterP) SelectFrom(values ...interface{}) []interface{} {
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vs := []interface{}{}
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for _, value := range values {
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if f.vp.Match(value) {
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vs = append(vs, value)
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}
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}
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return vs
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}
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type valueChildrenFilter struct{}
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func (valueChildrenFilter) SelectFrom(values ...interface{}) []interface{} {
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children := []interface{}{}
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// We could process all slices and then all maps, but we want to
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// keep things in the same order.
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for _, value := range values {
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// Only one of the two should do something useful.
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children = append(children, Slice().Children().SelectFrom(value)...)
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children = append(children, Map().Children().SelectFrom(value)...)
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}
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return children
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}
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// valueSliceFilter is a Value-to-Slice combined with a Slice-to-Value
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// to form a Value-to-Value.
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type valueSliceFilter struct {
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ss SliceS
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sf sliceFilter
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}
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func (s *valueSliceFilter) SelectFrom(values ...interface{}) []interface{} {
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return s.sf.SelectFrom(s.ss.SelectFrom(values...)...)
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}
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// valueMapFilter is a Value-to-Map combined with a Map-to-Value to form
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// a Value-to-Value.
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type valueMapFilter struct {
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ms MapS
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mf mapFilter
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}
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func (s *valueMapFilter) SelectFrom(values ...interface{}) []interface{} {
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return s.mf.SelectFrom(s.ms.SelectFrom(values...)...)
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}
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type valueAllFilter struct{}
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func (valueAllFilter) SelectFrom(values ...interface{}) []interface{} {
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vs := []interface{}{}
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for _, value := range values {
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vs = append(vs, value)
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// Only one of the follow two statements should return something ...
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vs = append(vs, Slice().All().SelectFrom(value)...)
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vs = append(vs, Map().All().SelectFrom(value)...)
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}
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return vs
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}
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