minio/pkg/s3select/internal/parquet-go/record.go

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/*
* Minio Cloud Storage, (C) 2019 Minio, 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 parquet
import (
"fmt"
"strings"
)
// Record - ordered parquet record.
type Record struct {
nameList []string
nameValueMap map[string]Value
}
// String - returns string representation of this record.
func (r *Record) String() string {
values := []string{}
r.Range(func(name string, value Value) bool {
values = append(values, fmt.Sprintf("%v:%v", name, value))
return true
})
return "map[" + strings.Join(values, " ") + "]"
}
func (r *Record) set(name string, value Value) {
r.nameValueMap[name] = value
}
// Get - returns Value of name.
func (r *Record) Get(name string) (Value, bool) {
value, ok := r.nameValueMap[name]
return value, ok
}
// Range - calls f sequentially for each name and value present in the record. If f returns false, range stops the iteration.
func (r *Record) Range(f func(name string, value Value) bool) {
for _, name := range r.nameList {
value, ok := r.nameValueMap[name]
if !ok {
continue
}
if !f(name, value) {
break
}
}
}
func newRecord(nameList []string) *Record {
return &Record{
nameList: nameList,
nameValueMap: make(map[string]Value),
}
}