mirror of
https://gitee.com/milvus-io/milvus.git
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136 lines
3.3 KiB
Go
136 lines
3.3 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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"fmt"
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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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// ColumnVarChar generated columns type for VarChar
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type ColumnVarChar struct {
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ColumnBase
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name string
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values []string
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}
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// Name returns column name
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func (c *ColumnVarChar) 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 *ColumnVarChar) Type() entity.FieldType {
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return entity.FieldTypeVarChar
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}
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// Len returns column values length
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func (c *ColumnVarChar) Len() int {
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return len(c.values)
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}
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func (c *ColumnVarChar) Slice(start, end int) Column {
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l := c.Len()
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if start > l {
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start = l
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}
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if end == -1 || end > l {
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end = l
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}
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return &ColumnVarChar{
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ColumnBase: c.ColumnBase,
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name: c.name,
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values: c.values[start:end],
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}
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}
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// Get returns value at index as interface{}.
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func (c *ColumnVarChar) Get(idx int) (interface{}, error) {
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if idx < 0 || idx > c.Len() {
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return "", 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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// GetAsString returns value at idx.
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func (c *ColumnVarChar) GetAsString(idx int) (string, error) {
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if idx < 0 || idx > c.Len() {
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return "", 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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// FieldData return column data mapped to schemapb.FieldData
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func (c *ColumnVarChar) FieldData() *schemapb.FieldData {
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fd := &schemapb.FieldData{
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Type: schemapb.DataType_VarChar,
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FieldName: c.name,
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}
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data := make([]string, 0, c.Len())
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for i := 0; i < c.Len(); i++ {
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data = append(data, c.values[i])
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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_StringData{
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StringData: &schemapb.StringArray{
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Data: data,
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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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// error occurs when index out of range
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func (c *ColumnVarChar) ValueByIdx(idx int) (string, error) {
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var r string // use default value
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if idx < 0 || idx >= c.Len() {
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return r, 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 *ColumnVarChar) AppendValue(i interface{}) error {
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v, ok := i.(string)
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if !ok {
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return fmt.Errorf("invalid type, expected string, got %T", i)
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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 *ColumnVarChar) Data() []string {
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return c.values
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}
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// NewColumnVarChar auto generated constructor
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func NewColumnVarChar(name string, values []string) *ColumnVarChar {
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return &ColumnVarChar{
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name: name,
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values: values,
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}
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}
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