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|
package schema
import (
"reflect"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
)
func StructToSchema(instance any) *schema_pb.RecordType {
myType := reflect.TypeOf(instance)
if myType.Kind() != reflect.Struct {
return nil
}
st := reflectTypeToSchemaType(myType)
return st.GetRecordType()
}
// CreateCombinedRecordType creates a combined RecordType that includes fields from both key and value schemas
// Key fields are prefixed with "key_" to distinguish them from value fields
func CreateCombinedRecordType(keyRecordType *schema_pb.RecordType, valueRecordType *schema_pb.RecordType) *schema_pb.RecordType {
var combinedFields []*schema_pb.Field
// Add key fields with "key_" prefix
if keyRecordType != nil {
for _, field := range keyRecordType.Fields {
keyField := &schema_pb.Field{
Name: "key_" + field.Name,
FieldIndex: field.FieldIndex, // Will be reindexed later
Type: field.Type,
IsRepeated: field.IsRepeated,
IsRequired: field.IsRequired,
}
combinedFields = append(combinedFields, keyField)
}
}
// Add value fields (no prefix)
if valueRecordType != nil {
for _, field := range valueRecordType.Fields {
combinedFields = append(combinedFields, field)
}
}
// Reindex all fields to have sequential indices
for i, field := range combinedFields {
field.FieldIndex = int32(i)
}
return &schema_pb.RecordType{
Fields: combinedFields,
}
}
func reflectTypeToSchemaType(t reflect.Type) *schema_pb.Type {
switch t.Kind() {
case reflect.Bool:
return TypeBoolean
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32:
return TypeInt32
case reflect.Int64:
return TypeInt64
case reflect.Float32:
return TypeFloat
case reflect.Float64:
return TypeDouble
case reflect.String:
return TypeString
case reflect.Slice:
switch t.Elem().Kind() {
case reflect.Uint8:
return TypeBytes
default:
if st := reflectTypeToSchemaType(t.Elem()); st != nil {
return &schema_pb.Type{
Kind: &schema_pb.Type_ListType{
ListType: &schema_pb.ListType{
ElementType: st,
},
},
}
}
}
case reflect.Struct:
recordType := &schema_pb.RecordType{}
for i := 0; i < t.NumField(); i++ {
field := t.Field(i)
fieldType := field.Type
fieldName := field.Name
schemaField := reflectTypeToSchemaType(fieldType)
if schemaField == nil {
return nil
}
recordType.Fields = append(recordType.Fields, &schema_pb.Field{
Name: fieldName,
Type: schemaField,
})
}
return &schema_pb.Type{
Kind: &schema_pb.Type_RecordType{
RecordType: recordType,
},
}
}
return nil
}
|
