github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/internal_test.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 bitalosdb
    16  
    17  type internalIterAdapter struct {
    18  	internalIterator
    19  	key *InternalKey
    20  	val []byte
    21  }
    22  
    23  func newInternalIterAdapter(iter internalIterator) *internalIterAdapter {
    24  	return &internalIterAdapter{
    25  		internalIterator: iter,
    26  	}
    27  }
    28  
    29  func (i *internalIterAdapter) update(key *InternalKey, val []byte) bool {
    30  	i.key = key
    31  	i.val = val
    32  	return i.key != nil
    33  }
    34  
    35  func (i *internalIterAdapter) String() string {
    36  	return "internal-iter-adapter"
    37  }
    38  
    39  func (i *internalIterAdapter) SeekGE(key []byte) bool {
    40  	return i.update(i.internalIterator.SeekGE(key))
    41  }
    42  
    43  func (i *internalIterAdapter) SeekPrefixGE(prefix, key []byte, trySeekUsingNext bool) bool {
    44  	return i.update(i.internalIterator.SeekPrefixGE(prefix, key, trySeekUsingNext))
    45  }
    46  
    47  func (i *internalIterAdapter) SeekLT(key []byte) bool {
    48  	return i.update(i.internalIterator.SeekLT(key))
    49  }
    50  
    51  func (i *internalIterAdapter) First() bool {
    52  	return i.update(i.internalIterator.First())
    53  }
    54  
    55  func (i *internalIterAdapter) Last() bool {
    56  	return i.update(i.internalIterator.Last())
    57  }
    58  
    59  func (i *internalIterAdapter) Next() bool {
    60  	return i.update(i.internalIterator.Next())
    61  }
    62  
    63  func (i *internalIterAdapter) Prev() bool {
    64  	return i.update(i.internalIterator.Prev())
    65  }
    66  
    67  func (i *internalIterAdapter) Key() *InternalKey {
    68  	return i.key
    69  }
    70  
    71  func (i *internalIterAdapter) Value() []byte {
    72  	return i.val
    73  }
    74  
    75  func (i *internalIterAdapter) Valid() bool {
    76  	return i.key != nil
    77  }