rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/s3select/json/args.go

@@ -0,0 +1,96 @@
+// Copyright (c) 2015-2021 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package json
+
+import (
+	"encoding/xml"
+	"fmt"
+	"strings"
+)
+
+const (
+	document = "document"
+	lines    = "lines"
+
+	defaultRecordDelimiter = "\n"
+)
+
+// ReaderArgs - represents elements inside <InputSerialization><JSON/> in request XML.
+type ReaderArgs struct {
+	ContentType string `xml:"Type"`
+	unmarshaled bool
+}
+
+// IsEmpty - returns whether reader args is empty or not.
+func (args *ReaderArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subReaderArgs ReaderArgs
+	parsedArgs := subReaderArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	parsedArgs.ContentType = strings.ToLower(parsedArgs.ContentType)
+	switch parsedArgs.ContentType {
+	case document, lines:
+	default:
+		return errInvalidJSONType(fmt.Errorf("invalid ContentType '%v'", parsedArgs.ContentType))
+	}
+
+	*args = ReaderArgs(parsedArgs)
+	args.unmarshaled = true
+	return nil
+}
+
+// WriterArgs - represents elements inside <OutputSerialization><JSON/> in request XML.
+type WriterArgs struct {
+	RecordDelimiter string `xml:"RecordDelimiter"`
+	unmarshaled     bool
+}
+
+// IsEmpty - returns whether writer args is empty or not.
+func (args *WriterArgs) IsEmpty() bool {
+	return !args.unmarshaled
+}
+
+// UnmarshalXML - decodes XML data.
+func (args *WriterArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Make subtype to avoid recursive UnmarshalXML().
+	type subWriterArgs WriterArgs
+	parsedArgs := subWriterArgs{}
+	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
+		return err
+	}
+
+	switch len(parsedArgs.RecordDelimiter) {
+	case 0:
+		parsedArgs.RecordDelimiter = defaultRecordDelimiter
+	case 1, 2:
+	default:
+		return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
+	}
+
+	*args = WriterArgs(parsedArgs)
+	args.unmarshaled = true
+	return nil
+}