mirror of https://github.com/knative/caching.git
63 lines
2.1 KiB
Go
63 lines
2.1 KiB
Go
/*
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Copyright 2018 The Knative 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 duck
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import (
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"encoding/json"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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)
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// ToUnstructured takes an instance of a OneOfOurs compatible type and
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// converts it to unstructured.Unstructured. We take OneOfOurs in place
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// or runtime.Object because sometimes we get resources that do not have their
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// TypeMeta populated but that is required for unstructured.Unstructured to
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// deserialize things, so we leverage our content-agnostic GroupVersionKind()
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// method to populate this as-needed (in a copy, so that we don't modify the
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// informer's copy, if that is what we are passed).
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func ToUnstructured(desired OneOfOurs) (*unstructured.Unstructured, error) {
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// If the TypeMeta is not populated, then unmarshalling will fail, so ensure
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// the TypeMeta is populated. See also EnsureTypeMeta.
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if gvk := desired.GroupVersionKind(); gvk.Version == "" || gvk.Kind == "" {
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gvk = desired.GetGroupVersionKind()
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desired = desired.DeepCopyObject().(OneOfOurs)
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desired.SetGroupVersionKind(gvk)
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}
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// Convert desired to unstructured.Unstructured
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b, err := json.Marshal(desired)
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if err != nil {
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return nil, err
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}
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ud := &unstructured.Unstructured{}
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if err := json.Unmarshal(b, ud); err != nil {
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return nil, err
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}
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return ud, nil
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}
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// FromUnstructured takes unstructured object from (say from client-go/dynamic) and
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// converts it into our duck types.
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func FromUnstructured(obj json.Marshaler, target interface{}) error {
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// Use the unstructured marshaller to ensure it's proper JSON
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raw, err := obj.MarshalJSON()
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if err != nil {
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return err
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}
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return json.Unmarshal(raw, &target)
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}
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