Spaces:
Running
Running
File size: 4,835 Bytes
b110593 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 |
// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package storobj
import (
"bytes"
"encoding/binary"
"strconv"
"github.com/buger/jsonparser"
"github.com/google/uuid"
"github.com/pkg/errors"
)
func ParseAndExtractProperty(data []byte, propName string) ([]string, bool, error) {
if propName == "id" || propName == "_id" {
return extractID(data)
}
if propName == "_creationTimeUnix" {
return extractCreationTimeUnix(data)
}
if propName == "_lastUpdateTimeUnix" {
return extractLastUpdateTimeUnix(data)
}
return ParseAndExtractTextProp(data, propName)
}
func ParseAndExtractTextProp(data []byte, propName string) ([]string, bool, error) {
vals := []string{}
err := parseAndExtractValueProp(data, propName, func(value []byte) {
vals = append(vals, string(value))
})
if err != nil {
return nil, false, err
}
return vals, true, nil
}
func ParseAndExtractNumberArrayProp(data []byte, propName string) ([]float64, bool, error) {
vals := []float64{}
err := parseAndExtractValueProp(data, propName, func(value []byte) {
vals = append(vals, mustExtractNumber(value))
})
if err != nil {
return nil, false, err
}
return vals, true, nil
}
func ParseAndExtractBoolArrayProp(data []byte, propName string) ([]bool, bool, error) {
vals := []bool{}
err := parseAndExtractValueProp(data, propName, func(value []byte) {
vals = append(vals, mustExtractBool(value))
})
if err != nil {
return nil, false, err
}
return vals, true, nil
}
func parseAndExtractValueProp(data []byte, propName string, valueFn func(value []byte)) error {
propsBytes, err := extractPropsBytes(data)
if err != nil {
return err
}
val, t, _, err := jsonparser.Get(propsBytes, propName)
// Some objects can have nil as value for the property, in this case skip the object
if err != nil {
if err.Error() == "Key path not found" {
return nil
}
return err
}
if t == jsonparser.Array {
jsonparser.ArrayEach(val, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
valueFn(value)
})
} else {
valueFn(val)
}
return nil
}
func mustExtractNumber(value []byte) float64 {
number, err := strconv.ParseFloat(string(value), 64)
if err != nil {
panic("not a float64")
}
return number
}
func mustExtractBool(value []byte) bool {
boolVal, err := strconv.ParseBool(string(value))
if err != nil {
panic("not a bool")
}
return boolVal
}
func extractID(data []byte) ([]string, bool, error) {
start := 1 + 8 + 1
end := start + 16
if len(data) > end {
uuidParsed, err := uuid.FromBytes(data[start:end])
if err != nil {
return nil, false, errors.New("cannot parse id property")
}
return []string{uuidParsed.String()}, true, nil
}
return nil, false, errors.New("id property not found")
}
func extractCreationTimeUnix(data []byte) ([]string, bool, error) {
start := 1 + 8 + 1 + 16
end := start + 8
if len(data) > end {
return extractTimeUnix(data[start:end], "_creationTimeUnix")
}
return nil, false, errors.New("_creationTimeUnix property not found")
}
func extractLastUpdateTimeUnix(data []byte) ([]string, bool, error) {
start := 1 + 8 + 1 + 16 + 8
end := start + 8
if len(data) > end {
return extractTimeUnix(data[start:end], "_lastUpdateTimeUnix")
}
return nil, false, errors.New("_lastUpdateTimeUnix property not found")
}
func extractTimeUnix(data []byte, propertyName string) ([]string, bool, error) {
var timeUnix int64
r := bytes.NewReader(data)
if err := binary.Read(r, binary.LittleEndian, &timeUnix); err != nil {
return nil, false, errors.Errorf("cannot parse %s property", propertyName)
}
return []string{strconv.FormatInt(timeUnix, 10)}, true, nil
}
func extractPropsBytes(data []byte) ([]byte, error) {
version := uint8(data[0])
if version != 1 {
return nil, errors.Errorf("unsupported binary marshaller version %d", version)
}
vecLen := binary.LittleEndian.Uint16(data[discardBytesPreVector : discardBytesPreVector+2])
classNameStart := int64(discardBytesPreVector) + 2 + int64(vecLen)*4
classNameLen := binary.LittleEndian.Uint16(data[classNameStart : classNameStart+2])
propsLenStart := classNameStart + 2 + int64(classNameLen)
propsLen := binary.LittleEndian.Uint32(data[propsLenStart : propsLenStart+4])
start := int64(propsLenStart + 4)
end := start + int64(propsLen)
return data[start:end], nil
}
const discardBytesPreVector = 1 + 8 + 1 + 16 + 8 + 8
|