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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package vectorizer
import (
"context"
"fmt"
"sort"
"strings"
"github.com/fatih/camelcase"
"github.com/weaviate/weaviate/entities/moduletools"
)
type ClassSettings interface {
PropertyIndexed(property string) bool
VectorizePropertyName(propertyName string) bool
VectorizeClassName() bool
}
type ObjectVectorizer struct{}
func New() *ObjectVectorizer {
return &ObjectVectorizer{}
}
func (v *ObjectVectorizer) TextsOrVector(ctx context.Context, className string,
schema interface{}, objDiff *moduletools.ObjectDiff,
icheck ClassSettings,
) (string, []float32, error) {
vectorize := objDiff == nil || objDiff.GetVec() == nil
var corpi []string
if icheck.VectorizeClassName() {
corpi = append(corpi, v.camelCaseToLower(className))
}
if schema != nil {
schemamap := schema.(map[string]interface{})
for _, prop := range v.sortStringKeys(schemamap) {
if !icheck.PropertyIndexed(prop) {
continue
}
appended := false
switch val := schemamap[prop].(type) {
case []string:
for _, elem := range val {
appended = v.appendPropIfText(icheck, &corpi, prop, elem) || appended
}
case []interface{}:
for _, elem := range val {
appended = v.appendPropIfText(icheck, &corpi, prop, elem) || appended
}
default:
appended = v.appendPropIfText(icheck, &corpi, prop, val)
}
vectorize = vectorize || (appended && objDiff != nil && objDiff.IsChangedProp(prop))
}
}
if len(corpi) == 0 {
// fall back to using the class name
corpi = append(corpi, v.camelCaseToLower(className))
}
// no property was changed, old vector can be used
if !vectorize {
return "", objDiff.GetVec(), nil
}
text := strings.Join(corpi, " ")
return text, nil, nil
}
func (v *ObjectVectorizer) sortStringKeys(schemaMap map[string]interface{}) []string {
keys := make([]string, 0, len(schemaMap))
for k := range schemaMap {
keys = append(keys, k)
}
sort.Strings(keys)
return keys
}
func (v *ObjectVectorizer) appendPropIfText(icheck ClassSettings, list *[]string, propName string,
value interface{},
) bool {
valueString, ok := value.(string)
if ok {
if icheck.VectorizePropertyName(propName) {
// use prop and value
*list = append(*list, strings.ToLower(
fmt.Sprintf("%s %s", v.camelCaseToLower(propName), valueString)))
} else {
*list = append(*list, strings.ToLower(valueString))
}
return true
}
return false
}
func (v *ObjectVectorizer) camelCaseToLower(in string) string {
parts := camelcase.Split(in)
var sb strings.Builder
for i, part := range parts {
if part == " " {
continue
}
if i > 0 {
sb.WriteString(" ")
}
sb.WriteString(strings.ToLower(part))
}
return sb.String()
}
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