mirror of https://github.com/poanetwork/gecko.git
92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package nodb
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import (
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"github.com/ava-labs/gecko/database"
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)
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// Database is a lightning fast key value store with probabilistic operations.
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type Database struct{}
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// Has returns false, nil
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func (*Database) Has([]byte) (bool, error) { return false, database.ErrClosed }
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// Get returns nil, error
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func (*Database) Get([]byte) ([]byte, error) { return nil, database.ErrClosed }
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// Put returns nil
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func (*Database) Put(_, _ []byte) error { return database.ErrClosed }
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// Delete returns nil
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func (*Database) Delete([]byte) error { return database.ErrClosed }
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// NewBatch returns a new batch
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func (*Database) NewBatch() database.Batch { return &Batch{} }
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// NewIterator returns a new empty iterator
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func (*Database) NewIterator() database.Iterator { return &Iterator{} }
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// NewIteratorWithStart returns a new empty iterator
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func (*Database) NewIteratorWithStart([]byte) database.Iterator { return &Iterator{} }
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// NewIteratorWithPrefix returns a new empty iterator
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func (*Database) NewIteratorWithPrefix([]byte) database.Iterator { return &Iterator{} }
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// NewIteratorWithStartAndPrefix returns a new empty iterator
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func (db *Database) NewIteratorWithStartAndPrefix(start, prefix []byte) database.Iterator {
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return &Iterator{}
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}
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// Stat returns an error
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func (*Database) Stat(string) (string, error) { return "", database.ErrClosed }
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// Compact returns nil
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func (*Database) Compact(_, _ []byte) error { return database.ErrClosed }
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// Close returns nil
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func (*Database) Close() error { return database.ErrClosed }
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// Batch does nothing
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type Batch struct{}
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// Put returns nil
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func (*Batch) Put(_, _ []byte) error { return database.ErrClosed }
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// Delete returns nil
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func (*Batch) Delete([]byte) error { return database.ErrClosed }
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// ValueSize returns 0
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func (*Batch) ValueSize() int { return 0 }
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// Write returns nil
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func (*Batch) Write() error { return database.ErrClosed }
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// Reset does nothing
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func (*Batch) Reset() {}
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// Replay does nothing
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func (*Batch) Replay(database.KeyValueWriter) error { return database.ErrClosed }
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// Inner returns itself
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func (b *Batch) Inner() database.Batch { return b }
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// Iterator does nothing
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type Iterator struct{ Err error }
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// Next returns false
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func (*Iterator) Next() bool { return false }
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// Error returns any errors
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func (it *Iterator) Error() error { return it.Err }
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// Key returns nil
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func (*Iterator) Key() []byte { return nil }
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// Value returns nil
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func (*Iterator) Value() []byte { return nil }
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// Release does nothing
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func (*Iterator) Release() {}
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