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107 lines
2.7 KiB
Go
107 lines
2.7 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 entity
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import (
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"encoding/binary"
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"math"
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)
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// Vector interface vector used int search
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type Vector interface {
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Dim() int
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Serialize() []byte
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FieldType() FieldType
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}
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// FloatVector float32 vector wrapper.
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type FloatVector []float32
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// Dim returns vector dimension.
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func (fv FloatVector) Dim() int {
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return len(fv)
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}
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// entity.FieldType returns coresponding field type.
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func (fv FloatVector) FieldType() FieldType {
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return FieldTypeFloatVector
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}
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// Serialize serializes vector into byte slice, used in search placeholder
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// LittleEndian is used for convention
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func (fv FloatVector) Serialize() []byte {
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data := make([]byte, 0, 4*len(fv)) // float32 occupies 4 bytes
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buf := make([]byte, 4)
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for _, f := range fv {
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binary.LittleEndian.PutUint32(buf, math.Float32bits(f))
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data = append(data, buf...)
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}
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return data
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}
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// FloatVector float32 vector wrapper.
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type Float16Vector []byte
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// Dim returns vector dimension.
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func (fv Float16Vector) Dim() int {
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return len(fv) / 2
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}
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// entity.FieldType returns coresponding field type.
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func (fv Float16Vector) FieldType() FieldType {
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return FieldTypeFloat16Vector
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}
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func (fv Float16Vector) Serialize() []byte {
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return fv
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}
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// FloatVector float32 vector wrapper.
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type BFloat16Vector []byte
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// Dim returns vector dimension.
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func (fv BFloat16Vector) Dim() int {
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return len(fv) / 2
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}
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// entity.FieldType returns coresponding field type.
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func (fv BFloat16Vector) FieldType() FieldType {
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return FieldTypeBFloat16Vector
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}
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func (fv BFloat16Vector) Serialize() []byte {
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return fv
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}
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// BinaryVector []byte vector wrapper
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type BinaryVector []byte
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// Dim return vector dimension, note that binary vector is bits count
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func (bv BinaryVector) Dim() int {
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return 8 * len(bv)
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}
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// Serialize just return bytes
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func (bv BinaryVector) Serialize() []byte {
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return bv
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}
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// entity.FieldType returns coresponding field type.
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func (bv BinaryVector) FieldType() FieldType {
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return FieldTypeBinaryVector
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}
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