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60 lines
2.0 KiB
Go
60 lines
2.0 KiB
Go
// Copyright 2025 Versity Software
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// This file is licensed under the Apache License, Version 2.0
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// (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package meta
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import (
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"os"
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)
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// NoMeta is a metadata storer that does not store metadata.
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// This can be useful for read only mounts where attempting to store metadata
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// would fail.
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type NoMeta struct{}
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// RetrieveAttribute retrieves the value of a specific attribute for an object or a bucket.
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// always returns ErrNoSuchKey
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func (NoMeta) RetrieveAttribute(_ *os.File, _, _, _ string) ([]byte, error) {
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return nil, ErrNoSuchKey
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}
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// StoreAttribute stores the value of a specific attribute for an object or a bucket.
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// always returns nil without storing the attribute
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func (NoMeta) StoreAttribute(_ *os.File, _, _, _ string, _ []byte) error {
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return nil
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}
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// DeleteAttribute removes the value of a specific attribute for an object or a bucket.
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// always returns nil without deleting the attribute
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func (NoMeta) DeleteAttribute(_, _, _ string) error {
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return nil
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}
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// ListAttributes lists all attributes for an object or a bucket.
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// always returns an empty list of attributes
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func (NoMeta) ListAttributes(_, _ string) ([]string, error) {
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return []string{}, nil
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}
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// DeleteAttributes removes all attributes for an object or a bucket.
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// always returns nil without deleting any attributes
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func (NoMeta) DeleteAttributes(bucket, object string) error {
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return nil
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}
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// RenameObject is a no-op because NoMeta does not store metadata.
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func (NoMeta) RenameObject(_, _, _ string) error {
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return nil
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}
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