github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/internal/base/iterator.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package base
    16  
    17  import "fmt"
    18  
    19  type InternalIterator interface {
    20  	SeekGE(key []byte) (*InternalKey, []byte)
    21  	SeekPrefixGE(prefix, key []byte, trySeekUsingNext bool) (*InternalKey, []byte)
    22  	SeekLT(key []byte) (*InternalKey, []byte)
    23  	First() (*InternalKey, []byte)
    24  	Last() (*InternalKey, []byte)
    25  	Next() (*InternalKey, []byte)
    26  	Prev() (*InternalKey, []byte)
    27  	Error() error
    28  	Close() error
    29  	SetBounds(lower, upper []byte)
    30  	fmt.Stringer
    31  }