92 lines
2.7 KiB
Go
92 lines
2.7 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 interfaceFilter allows us to chain InterfaceS to InterfaceS. None of this is
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// public. It's implementing the "SelectFrom" part of a InterfaceS.
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type interfaceFilter interface {
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SelectFrom(...interface{}) []interface{}
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}
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// interfaceFilterP filters using a predicate.
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type interfaceFilterP struct {
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vp p.Interface
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}
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func (f *interfaceFilterP) SelectFrom(interfaces ...interface{}) []interface{} {
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vs := []interface{}{}
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for _, value := range interfaces {
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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 interfaceChildrenFilter struct{}
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func (interfaceChildrenFilter) SelectFrom(interfaces ...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 interfaces {
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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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// interfaceSliceFilter is a Interface-to-Slice combined with a Slice-to-Interface
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// to form a Interface-to-Interface.
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type interfaceSliceFilter struct {
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ss SliceS
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sf sliceFilter
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}
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func (s *interfaceSliceFilter) SelectFrom(interfaces ...interface{}) []interface{} {
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return s.sf.SelectFrom(s.ss.SelectFrom(interfaces...)...)
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}
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// interfaceMapFilter is a Interface-to-Map combined with a Map-to-Interface to form
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// a Interface-to-Interface.
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type interfaceMapFilter struct {
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ms MapS
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mf mapFilter
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}
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func (s *interfaceMapFilter) SelectFrom(interfaces ...interface{}) []interface{} {
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return s.mf.SelectFrom(s.ms.SelectFrom(interfaces...)...)
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}
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type interfaceAllFilter struct{}
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func (interfaceAllFilter) SelectFrom(interfaces ...interface{}) []interface{} {
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vs := []interface{}{}
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for _, value := range interfaces {
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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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