conversion.go

/*
Copyright 2016 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package v1beta1

import (
	"fmt"

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/conversion"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/kubernetes/pkg/api"
	v1 "k8s.io/kubernetes/pkg/api/v1"
	"k8s.io/kubernetes/pkg/apis/apps"
)

func addConversionFuncs(scheme *runtime.Scheme) error {
	// Add non-generated conversion functions to handle the *int32 -> int32
	// conversion. A pointer is useful in the versioned type so we can default
	// it, but a plain int32 is more convenient in the internal type. These
	// functions are the same as the autogenerated ones in every other way.
	err := scheme.AddConversionFuncs(
		Convert_v1beta1_StatefulSetSpec_To_apps_StatefulSetSpec,
		Convert_apps_StatefulSetSpec_To_v1beta1_StatefulSetSpec,
	)
	if err != nil {
		return err
	}

	return scheme.AddFieldLabelConversionFunc("apps/v1beta1", "StatefulSet",
		func(label, value string) (string, string, error) {
			switch label {
			case "metadata.name", "metadata.namespace", "status.successful":
				return label, value, nil
			default:
				return "", "", fmt.Errorf("field label not supported: %s", label)
			}
		},
	)
}

func Convert_v1beta1_StatefulSetSpec_To_apps_StatefulSetSpec(in *StatefulSetSpec, out *apps.StatefulSetSpec, s conversion.Scope) error {
	if in.Replicas != nil {
		out.Replicas = *in.Replicas
	}
	if in.Selector != nil {
		in, out := &in.Selector, &out.Selector
		*out = new(metav1.LabelSelector)
		if err := s.Convert(*in, *out, 0); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if err := s.Convert(&in.Template, &out.Template, 0); err != nil {
		return err
	}
	if in.VolumeClaimTemplates != nil {
		in, out := &in.VolumeClaimTemplates, &out.VolumeClaimTemplates
		*out = make([]api.PersistentVolumeClaim, len(*in))
		for i := range *in {
			if err := s.Convert(&(*in)[i], &(*out)[i], 0); err != nil {
				return err
			}
		}
	} else {
		out.VolumeClaimTemplates = nil
	}
	out.ServiceName = in.ServiceName
	return nil
}

func Convert_apps_StatefulSetSpec_To_v1beta1_StatefulSetSpec(in *apps.StatefulSetSpec, out *StatefulSetSpec, s conversion.Scope) error {
	out.Replicas = new(int32)
	*out.Replicas = in.Replicas
	if in.Selector != nil {
		in, out := &in.Selector, &out.Selector
		*out = new(metav1.LabelSelector)
		if err := s.Convert(*in, *out, 0); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if err := s.Convert(&in.Template, &out.Template, 0); err != nil {
		return err
	}
	if in.VolumeClaimTemplates != nil {
		in, out := &in.VolumeClaimTemplates, &out.VolumeClaimTemplates
		*out = make([]v1.PersistentVolumeClaim, len(*in))
		for i := range *in {
			if err := s.Convert(&(*in)[i], &(*out)[i], 0); err != nil {
				return err
			}
		}
	} else {
		out.VolumeClaimTemplates = nil
	}
	out.ServiceName = in.ServiceName
	return nil
}