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sort.go
64 lines (60 loc) · 1.43 KB
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sort.go
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// Copyright 2020 Soluble Inc
//
// Licensed 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 print
import "github.com/soluble-ai/go-jnode"
type rowsSort struct {
values []*jnode.Node
sortBy []string
}
func (r *rowsSort) Len() int {
return len(r.values)
}
func (r *rowsSort) Swap(i, j int) {
r.values[i], r.values[j] = r.values[j], r.values[i]
}
func (r *rowsSort) Less(i, j int) bool {
ei := r.values[i]
ej := r.values[j]
for _, name := range r.sortBy {
asc := true
numeric := false
if name[0] == '-' {
name = name[1:]
asc = false
}
if len(name) > 1 && name[0] == '0' {
numeric = true
name = name[1:]
}
if numeric {
ni := ei.Path(name).AsFloat()
nj := ej.Path(name).AsFloat()
if ni != nj {
if asc {
return ni < nj
}
return nj < ni
}
}
vi := ei.Path(name).AsText()
vj := ej.Path(name).AsText()
if vi != vj {
if asc {
return vi < vj
}
return vj < vi
}
}
return false
}