| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package writer |
| |
| func firstColumnCmpFunc(row1, row2 []string) bool { |
| return row1[0] < row2[0] |
| } |
| |
| type RecordsSorter struct { |
| Records [][]string |
| CompareFunc func(row1, row2 []string) bool |
| } |
| |
| func (s *RecordsSorter) Len() int { |
| return len(s.Records) |
| } |
| |
| func (s *RecordsSorter) Swap(i, j int) { |
| s.Records[i], s.Records[j] = s.Records[j], s.Records[i] |
| } |
| |
| func (s *RecordsSorter) Less(i, j int) bool { |
| return s.CompareFunc(s.Records[i], s.Records[j]) |
| } |
| |
| func NewRecordsSorter(cmp func([]string, []string) bool) *RecordsSorter { |
| if cmp == nil { |
| cmp = firstColumnCmpFunc |
| } |
| return &RecordsSorter{ |
| CompareFunc: cmp, |
| } |
| } |
