85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
package object
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import (
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"github.com/nspcc-dev/neofs-proto/hash"
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)
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// IsLinking checks if object has children links to another objects.
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// We have to check payload size because zero-object must have zero
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// payload and non-zero payload length field in system header.
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func (m Object) IsLinking() bool {
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for i := range m.Headers {
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switch v := m.Headers[i].Value.(type) {
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case *Header_Link:
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if v.Link.GetType() == Link_Child {
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return m.SystemHeader.PayloadLength > 0 && len(m.Payload) == 0
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}
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}
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}
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return false
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}
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// VerificationHeader returns verification header if it is presented in extended headers.
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func (m Object) VerificationHeader() (*VerificationHeader, error) {
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_, vh := m.LastHeader(HeaderType(VerifyHdr))
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if vh == nil {
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return nil, ErrHeaderNotFound
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}
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return vh.Value.(*Header_Verify).Verify, nil
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}
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// SetVerificationHeader sets verification header in the object.
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// It will replace existing verification header or add a new one.
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func (m *Object) SetVerificationHeader(header *VerificationHeader) {
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m.SetHeader(&Header{Value: &Header_Verify{Verify: header}})
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}
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// Links returns slice of ids of specified link type
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func (m *Object) Links(t Link_Type) []ID {
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var res []ID
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for i := range m.Headers {
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switch v := m.Headers[i].Value.(type) {
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case *Header_Link:
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if v.Link.GetType() == t {
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res = append(res, v.Link.ID)
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}
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}
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}
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return res
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}
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// Tombstone returns tombstone header if it is presented in extended headers.
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func (m Object) Tombstone() *Tombstone {
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_, h := m.LastHeader(HeaderType(TombstoneHdr))
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if h != nil {
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return h.Value.(*Header_Tombstone).Tombstone
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}
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return nil
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}
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// IsTombstone checks if object has tombstone header.
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func (m Object) IsTombstone() bool {
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n, _ := m.LastHeader(HeaderType(TombstoneHdr))
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return n != -1
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}
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// StorageGroup returns storage group structure if it is presented in extended headers.
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func (m Object) StorageGroup() (*StorageGroup, error) {
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_, sgHdr := m.LastHeader(HeaderType(StorageGroupHdr))
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if sgHdr == nil {
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return nil, ErrHeaderNotFound
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}
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return sgHdr.Value.(*Header_StorageGroup).StorageGroup, nil
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}
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// SetStorageGroup sets storage group header in the object.
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// It will replace existing storage group header or add a new one.
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func (m *Object) SetStorageGroup(sg *StorageGroup) {
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m.SetHeader(&Header{Value: &Header_StorageGroup{StorageGroup: sg}})
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}
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// Empty checks if storage group has some data for validation.
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func (m StorageGroup) Empty() bool {
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return m.ValidationDataSize == 0 && m.ValidationHash.Equal(hash.Hash{})
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}
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