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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()
}
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
}
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