mirror of https://github.com/k3s-io/k3s
121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
/*
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Copyright 2017 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 parse
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import (
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"fmt"
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"reflect"
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"k8s.io/kube-openapi/pkg/util/proto"
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"k8s.io/kubernetes/pkg/kubectl/apply"
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"k8s.io/kubernetes/pkg/kubectl/cmd/util/openapi"
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)
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// Factory creates an Element by combining object values from recorded, local and remote sources with
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// the metadata from an openapi schema.
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type Factory struct {
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// Resources contains the openapi field metadata for the object models
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Resources openapi.Resources
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}
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// CreateElement returns an Element by collating the recorded, local and remote field values
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func (b *Factory) CreateElement(recorded, local, remote map[string]interface{}) (apply.Element, error) {
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// Create an Item from the 3 values. Use empty name for field
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visitor := &ElementBuildingVisitor{b.Resources}
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gvk, err := getCommonGroupVersionKind(recorded, local, remote)
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if err != nil {
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return nil, err
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}
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// Get the openapi object metadata
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s := visitor.resources.LookupResource(gvk)
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oapiKind, err := getKind(s)
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if err != nil {
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return nil, err
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}
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data := apply.NewRawElementData(recorded, local, remote)
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fieldName := ""
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item, err := visitor.getItem(oapiKind, fieldName, data)
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if err != nil {
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return nil, err
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}
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// Collate each field of the item into a combined Element
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return item.CreateElement(visitor)
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}
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// getItem returns the appropriate Item based on the underlying type of the arguments
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func (v *ElementBuildingVisitor) getItem(s proto.Schema, name string, data apply.RawElementData) (Item, error) {
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kind, err := getType(data.GetRecorded(), data.GetLocal(), data.GetRemote())
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if err != nil {
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return nil, err
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}
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if kind == nil {
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// All of the items values are nil.
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return &emptyItem{Name: name}, nil
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}
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// Create an item matching the type
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switch kind.Kind() {
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case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint,
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reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64,
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reflect.String:
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p, err := getPrimitive(s)
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if err != nil {
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return nil, fmt.Errorf("expected openapi Primitive, was %T for %v (%v)", s, kind, err)
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}
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return &primitiveItem{name, p, data}, nil
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case reflect.Array, reflect.Slice:
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a, err := getArray(s)
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if err != nil {
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return nil, fmt.Errorf("expected openapi Array, was %T for %v (%v)", s, kind, err)
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}
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return &listItem{
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Name: name,
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Array: a,
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ListElementData: apply.ListElementData{
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RawElementData: data,
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},
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}, nil
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case reflect.Map:
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if k, err := getKind(s); err == nil {
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return &typeItem{
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Name: name,
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Type: k,
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MapElementData: apply.MapElementData{
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RawElementData: data,
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},
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}, nil
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}
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// If it looks like a map, and no openapi type is found, default to mapItem
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m, err := getMap(s)
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if err != nil {
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return nil, fmt.Errorf("expected openapi Kind or Map, was %T for %v (%v)", s, kind, err)
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}
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return &mapItem{
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Name: name,
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Map: m,
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MapElementData: apply.MapElementData{
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RawElementData: data,
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},
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}, nil
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}
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return nil, fmt.Errorf("unsupported type %v", kind)
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}
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