github.com/minio/minio@v0.0.0-20240328213742-3f72439b8a27/internal/s3select/parquet/args.go (about)

     1  // Copyright (c) 2015-2021 MinIO, Inc.
     2  //
     3  // This file is part of MinIO Object Storage stack
     4  //
     5  // This program is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Affero General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // This program is distributed in the hope that it will be useful
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU Affero General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Affero General Public License
    16  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package parquet
    19  
    20  import "encoding/xml"
    21  
    22  // ReaderArgs - represents elements inside <InputSerialization><Parquet/> in request XML.
    23  type ReaderArgs struct {
    24  	unmarshaled bool
    25  }
    26  
    27  // IsEmpty - returns whether reader args is empty or not.
    28  func (args *ReaderArgs) IsEmpty() bool {
    29  	return !args.unmarshaled
    30  }
    31  
    32  // UnmarshalXML - decodes XML data.
    33  func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
    34  	// Make subtype to avoid recursive UnmarshalXML().
    35  	type subReaderArgs ReaderArgs
    36  	parsedArgs := subReaderArgs{}
    37  	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
    38  		return err
    39  	}
    40  
    41  	args.unmarshaled = true
    42  	return nil
    43  }