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175f49ea60
Related to #31293 Previous column is written using go before 1.18, which does not support generic type. After migrating client pkg to main repo, generic base could be used to reduce lots of duplicated code. --------- Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
114 lines
3.0 KiB
Go
114 lines
3.0 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package column
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import (
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"github.com/cockroachdb/errors"
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"github.com/tidwall/gjson"
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)
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// ColumnDynamic is a logically wrapper for dynamic json field with provided output field.
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type ColumnDynamic struct {
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*ColumnJSONBytes
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outputField string
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}
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func NewColumnDynamic(column *ColumnJSONBytes, outputField string) *ColumnDynamic {
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return &ColumnDynamic{
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ColumnJSONBytes: column,
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outputField: outputField,
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}
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}
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func (c *ColumnDynamic) Name() string {
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return c.outputField
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}
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// Get returns element at idx as interface{}.
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// Overrides internal json column behavior, returns raw json data.
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func (c *ColumnDynamic) Get(idx int) (interface{}, error) {
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bs, err := c.ColumnJSONBytes.Value(idx)
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if err != nil {
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return 0, err
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}
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r := gjson.GetBytes(bs, c.outputField)
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if !r.Exists() {
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return 0, errors.New("column not has value")
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}
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return r.Raw, nil
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}
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func (c *ColumnDynamic) GetAsInt64(idx int) (int64, error) {
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bs, err := c.ColumnJSONBytes.Value(idx)
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if err != nil {
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return 0, err
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}
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r := gjson.GetBytes(bs, c.outputField)
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if !r.Exists() {
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return 0, errors.New("column not has value")
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}
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if r.Type != gjson.Number {
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return 0, errors.New("column not int")
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}
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return r.Int(), nil
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}
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func (c *ColumnDynamic) GetAsString(idx int) (string, error) {
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bs, err := c.ColumnJSONBytes.Value(idx)
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if err != nil {
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return "", err
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}
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r := gjson.GetBytes(bs, c.outputField)
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if !r.Exists() {
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return "", errors.New("column not has value")
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}
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if r.Type != gjson.String {
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return "", errors.New("column not string")
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}
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return r.String(), nil
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}
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func (c *ColumnDynamic) GetAsBool(idx int) (bool, error) {
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bs, err := c.ColumnJSONBytes.Value(idx)
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if err != nil {
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return false, err
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}
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r := gjson.GetBytes(bs, c.outputField)
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if !r.Exists() {
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return false, errors.New("column not has value")
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}
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if !r.IsBool() {
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return false, errors.New("column not string")
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}
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return r.Bool(), nil
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}
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func (c *ColumnDynamic) GetAsDouble(idx int) (float64, error) {
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bs, err := c.ColumnJSONBytes.Value(idx)
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if err != nil {
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return 0, err
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}
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r := gjson.GetBytes(bs, c.outputField)
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if !r.Exists() {
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return 0, errors.New("column not has value")
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}
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if r.Type != gjson.Number {
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return 0, errors.New("column not string")
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}
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return r.Float(), nil
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}
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