github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/store/types/kvp.go (about)

     1  // Copyright 2019 Dolthub, Inc.
     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 types
    16  
    17  // KVP is a simple key value pair
    18  type KVP struct {
    19  	// Key is the key
    20  	Key LesserValuable
    21  
    22  	// Val is the value
    23  	Val Valuable
    24  }
    25  
    26  // KVPSlice is a slice of KVPs that implements sort.Interface
    27  type KVPSlice []KVP
    28  
    29  type KVPSort struct {
    30  	Values []KVP
    31  	NBF    *NomsBinFormat
    32  }
    33  
    34  // Len returns the size of the slice
    35  func (kvps KVPSort) Len() int {
    36  	return len(kvps.Values)
    37  }
    38  
    39  // Less returns a bool representing whether the key at index i is less than the key at index j
    40  func (kvps KVPSort) Less(i, j int) (bool, error) {
    41  	return kvps.Values[i].Key.Less(kvps.NBF, kvps.Values[j].Key)
    42  }
    43  
    44  // Swap swaps the KVP at index i with the KVP at index j
    45  func (kvps KVPSort) Swap(i, j int) {
    46  	kvps.Values[i], kvps.Values[j] = kvps.Values[j], kvps.Values[i]
    47  }