50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
package shard
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import (
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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/pkg/errors"
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)
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// ExistsPrm groups the parameters of Exists operation.
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type ExistsPrm struct {
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addr *object.Address
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}
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// ExistsRes groups resulting values of Exists operation.
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type ExistsRes struct {
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ex bool
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}
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// WithAddress is an Exists option to set object checked for existence.
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func (p *ExistsPrm) WithAddress(addr *object.Address) *ExistsPrm {
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if p != nil {
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p.addr = addr
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}
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return p
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}
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// Exists returns the fact that the object is in the shard.
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func (p *ExistsRes) Exists() bool {
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return p.ex
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}
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// Exists checks if object is presented in shard.
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//
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// Returns any error encountered that does not allow to
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// unambiguously determine the presence of an object.
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func (s *Shard) Exists(prm *ExistsPrm) (*ExistsRes, error) {
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exists, err := s.objectExists(prm.addr)
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if err != nil {
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return nil, errors.Wrap(err, "could not check object presence in metabase")
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}
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return &ExistsRes{
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ex: exists,
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}, nil
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}
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func (s *Shard) objectExists(addr *object.Address) (bool, error) {
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return s.metaBase.Exists(addr)
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}
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