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6b3a6e6b98
Instead of saying "Google Inc." (which is not always correct) say "The Kubernetes Authors", which is generic.
113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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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 conversion
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import (
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"encoding/json"
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"errors"
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"fmt"
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)
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// Decode converts a JSON string back into a pointer to an api object.
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// Deduces the type based upon the fields added by the MetaInsertionFactory
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// technique. The object will be converted, if necessary, into the
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// s.InternalVersion type before being returned. Decode will not decode
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// objects without version set unless InternalVersion is also "".
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func (s *Scheme) Decode(data []byte) (interface{}, error) {
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version, kind, err := s.DataVersionAndKind(data)
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if err != nil {
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return nil, err
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}
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if version == "" && s.InternalVersion != "" {
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return nil, fmt.Errorf("version not set in '%s'", string(data))
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}
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if kind == "" {
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return nil, fmt.Errorf("kind not set in '%s'", string(data))
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}
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obj, err := s.NewObject(version, kind)
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if err != nil {
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return nil, err
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}
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if err := json.Unmarshal(data, obj); err != nil {
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return nil, err
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}
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// Version and Kind should be blank in memory.
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if err := s.SetVersionAndKind("", "", obj); err != nil {
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return nil, err
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}
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// Convert if needed.
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if s.InternalVersion != version {
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objOut, err := s.NewObject(s.InternalVersion, kind)
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if err != nil {
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return nil, err
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}
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flags, meta := s.generateConvertMeta(version, s.InternalVersion, obj)
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if err := s.converter.Convert(obj, objOut, flags, meta); err != nil {
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return nil, err
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}
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obj = objOut
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}
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return obj, nil
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}
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// DecodeInto parses a JSON string and stores it in obj. Returns an error
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// if data.Kind is set and doesn't match the type of obj. Obj should be a
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// pointer to an api type.
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// If obj's version doesn't match that in data, an attempt will be made to convert
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// data into obj's version.
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func (s *Scheme) DecodeInto(data []byte, obj interface{}) error {
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if len(data) == 0 {
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return errors.New("empty input")
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}
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dataVersion, dataKind, err := s.DataVersionAndKind(data)
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if err != nil {
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return err
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}
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objVersion, objKind, err := s.ObjectVersionAndKind(obj)
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if err != nil {
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return err
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}
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if dataKind == "" {
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// Assume objects with unset Kind fields are being unmarshalled into the
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// correct type.
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dataKind = objKind
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}
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if dataVersion == "" {
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// Assume objects with unset Version fields are being unmarshalled into the
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// correct type.
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dataVersion = objVersion
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}
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external, err := s.NewObject(dataVersion, dataKind)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(data, external); err != nil {
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return err
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}
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flags, meta := s.generateConvertMeta(dataVersion, objVersion, external)
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if err := s.converter.Convert(external, obj, flags, meta); err != nil {
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return err
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}
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// Version and Kind should be blank in memory.
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return s.SetVersionAndKind("", "", obj)
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}
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