YQ Connector: prepare code base for S3 integration

1. Кодовая база Коннектора переписана с помощью Go дженериков так, чтобы добавление нового источника данных (в частности S3 + csv) максимально переиспользовало имеющийся код (чтобы сохранялась логика нарезания на блоки данных, учёт трафика и пр.)
2. API Connector расширено для работы с S3, но ещё пока не протестировано.

1 files changed, 53 insertions, 0 deletions

diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/map.go b/vendor/github.com/aws/smithy-go/encoding/xml/map.go
new file mode 100644
index 0000000000..e42858965c
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/map.go
@@ -0,0 +1,53 @@
+package xml
+
+// mapEntryWrapper is the default member wrapper start element for XML Map entry
+var mapEntryWrapper = StartElement{
+	Name: Name{Local: "entry"},
+}
+
+// Map represents the encoding of a XML map type
+type Map struct {
+	w       writer
+	scratch *[]byte
+
+	// member start element is the map entry wrapper start element
+	memberStartElement StartElement
+
+	// isFlattened returns true if the map is a flattened map
+	isFlattened bool
+}
+
+// newMap returns a map encoder which sets the default map
+// entry wrapper to `entry`.
+//
+// A map `someMap : {{key:"abc", value:"123"}}` is represented as
+// `<someMap><entry><key>abc<key><value>123</value></entry></someMap>`.
+func newMap(w writer, scratch *[]byte) *Map {
+	return &Map{
+		w:                  w,
+		scratch:            scratch,
+		memberStartElement: mapEntryWrapper,
+	}
+}
+
+// newFlattenedMap returns a map encoder which sets the map
+// entry wrapper to the passed in memberWrapper`.
+//
+// A flattened map `someMap : {{key:"abc", value:"123"}}` is represented as
+// `<someMap><key>abc<key><value>123</value></someMap>`.
+func newFlattenedMap(w writer, scratch *[]byte, memberWrapper StartElement) *Map {
+	return &Map{
+		w:                  w,
+		scratch:            scratch,
+		memberStartElement: memberWrapper,
+		isFlattened:        true,
+	}
+}
+
+// Entry returns a Value encoder with map's element.
+// It writes the member wrapper start tag for each entry.
+func (m *Map) Entry() Value {
+	v := newValue(m.w, m.scratch, m.memberStartElement)
+	v.isFlattened = m.isFlattened
+	return v
+}