// Decode attempts a decode of the object, then tries to convert it to the internal version. If into is provided and the decoding is
// successful, the returned runtime.Object will be the value passed as into. Note that this may bypass conversion if you pass an
// into that matches the serialized version.
func (c *codec) Decode(data []byte, defaultGVK *unversioned.GroupVersionKind, into runtime.Object) (runtime.Object, *unversioned.GroupVersionKind, error) {
versioned, isVersioned := into.(*runtime.VersionedObjects)
if isVersioned {
into = versioned.Last()
}
obj, gvk, err := c.decoder.Decode(data, defaultGVK, into)
if err != nil {
return nil, gvk, err
}
// if we specify a target, use generic conversion.
if into != nil {
if into == obj {
if isVersioned {
return versioned, gvk, nil
}
return into, gvk, nil
}
if err := c.convertor.Convert(obj, into); err != nil {
return nil, gvk, err
}
if isVersioned {
versioned.Objects = []runtime.Object{obj, into}
return versioned, gvk, nil
}
return into, gvk, nil
}
// invoke a version conversion
group := gvk.Group
if defaultGVK != nil {
group = defaultGVK.Group
}
var targetGV unversioned.GroupVersion
if c.decodeVersion == nil {
// convert to internal by default
targetGV.Group = group
targetGV.Version = runtime.APIVersionInternal
} else {
gv, ok := c.decodeVersion[group]
if !ok {
// unknown objects are left in their original version
if isVersioned {
versioned.Objects = []runtime.Object{obj}
return versioned, gvk, nil
}
return obj, gvk, nil
}
targetGV = gv
}
if gvk.GroupVersion() == targetGV {
if isVersioned {
versioned.Objects = []runtime.Object{obj}
return versioned, gvk, nil
}
return obj, gvk, nil
}
if isVersioned {
// create a copy, because ConvertToVersion does not guarantee non-mutation of objects
copied, err := c.copier.Copy(obj)
if err != nil {
copied = obj
}
versioned.Objects = []runtime.Object{copied}
}
// Convert if needed.
out, err := c.convertor.ConvertToVersion(obj, targetGV)
if err != nil {
return nil, gvk, err
}
if isVersioned {
versioned.Objects = append(versioned.Objects, out)
return versioned, gvk, nil
}
return out, gvk, nil
}
