mirror of
https://gitee.com/milvus-io/milvus.git
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147 lines
3.5 KiB
Go
147 lines
3.5 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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"encoding/json"
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"fmt"
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"reflect"
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"github.com/cockroachdb/errors"
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"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
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"github.com/milvus-io/milvus/client/v2/entity"
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)
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var _ (Column) = (*ColumnJSONBytes)(nil)
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// ColumnJSONBytes column type for JSON.
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// all items are marshaled json bytes.
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type ColumnJSONBytes struct {
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ColumnBase
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name string
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values [][]byte
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isDynamic bool
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}
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// Name returns column name.
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func (c *ColumnJSONBytes) Name() string {
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return c.name
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}
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// Type returns column entity.FieldType.
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func (c *ColumnJSONBytes) Type() entity.FieldType {
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return entity.FieldTypeJSON
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}
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// Len returns column values length.
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func (c *ColumnJSONBytes) Len() int {
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return len(c.values)
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}
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// Get returns value at index as interface{}.
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func (c *ColumnJSONBytes) Get(idx int) (interface{}, error) {
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if idx < 0 || idx > c.Len() {
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return nil, errors.New("index out of range")
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}
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return c.values[idx], nil
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}
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func (c *ColumnJSONBytes) GetAsString(idx int) (string, error) {
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bs, err := c.ValueByIdx(idx)
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if err != nil {
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return "", err
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}
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return string(bs), nil
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}
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// FieldData return column data mapped to schemapb.FieldData.
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func (c *ColumnJSONBytes) FieldData() *schemapb.FieldData {
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fd := &schemapb.FieldData{
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Type: schemapb.DataType_JSON,
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FieldName: c.name,
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IsDynamic: c.isDynamic,
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}
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fd.Field = &schemapb.FieldData_Scalars{
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Scalars: &schemapb.ScalarField{
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Data: &schemapb.ScalarField_JsonData{
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JsonData: &schemapb.JSONArray{
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Data: c.values,
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},
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},
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},
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}
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return fd
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}
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// ValueByIdx returns value of the provided index.
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func (c *ColumnJSONBytes) ValueByIdx(idx int) ([]byte, error) {
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if idx < 0 || idx >= c.Len() {
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return nil, errors.New("index out of range")
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}
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return c.values[idx], nil
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}
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// AppendValue append value into column.
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func (c *ColumnJSONBytes) AppendValue(i interface{}) error {
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var v []byte
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switch raw := i.(type) {
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case []byte:
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v = raw
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default:
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k := reflect.TypeOf(i).Kind()
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if k == reflect.Ptr {
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k = reflect.TypeOf(i).Elem().Kind()
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}
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switch k {
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case reflect.Struct:
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fallthrough
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case reflect.Map:
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bs, err := json.Marshal(raw)
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if err != nil {
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return err
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}
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v = bs
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default:
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return fmt.Errorf("expect json compatible type([]byte, struct[}, map], got %T)", i)
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}
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}
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c.values = append(c.values, v)
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return nil
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}
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// Data returns column data.
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func (c *ColumnJSONBytes) Data() [][]byte {
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return c.values
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}
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func (c *ColumnJSONBytes) WithIsDynamic(isDynamic bool) *ColumnJSONBytes {
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c.isDynamic = isDynamic
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return c
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}
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// NewColumnJSONBytes composes a Column with json bytes.
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func NewColumnJSONBytes(name string, values [][]byte) *ColumnJSONBytes {
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return &ColumnJSONBytes{
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name: name,
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values: values,
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}
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}
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