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, 52 insertions, 0 deletions

diff --git a/vendor/github.com/aws/smithy-go/properties.go b/vendor/github.com/aws/smithy-go/properties.go
new file mode 100644
index 0000000000..17d659c539
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/properties.go
@@ -0,0 +1,52 @@
+package smithy
+
+// PropertiesReader provides an interface for reading metadata from the
+// underlying metadata container.
+type PropertiesReader interface {
+	Get(key interface{}) interface{}
+}
+
+// Properties provides storing and reading metadata values. Keys may be any
+// comparable value type. Get and set will panic if key is not a comparable
+// value type.
+//
+// Properties uses lazy initialization, and Set method must be called as an
+// addressable value, or pointer. Not doing so may cause key/value pair to not
+// be set.
+type Properties struct {
+	values map[interface{}]interface{}
+}
+
+// Get attempts to retrieve the value the key points to. Returns nil if the
+// key was not found.
+//
+// Panics if key type is not comparable.
+func (m *Properties) Get(key interface{}) interface{} {
+	return m.values[key]
+}
+
+// Set stores the value pointed to by the key. If a value already exists at
+// that key it will be replaced with the new value.
+//
+// Set method must be called as an addressable value, or pointer. If Set is not
+// called as an addressable value or pointer, the key value pair being set may
+// be lost.
+//
+// Panics if the key type is not comparable.
+func (m *Properties) Set(key, value interface{}) {
+	if m.values == nil {
+		m.values = map[interface{}]interface{}{}
+	}
+	m.values[key] = value
+}
+
+// Has returns whether the key exists in the metadata.
+//
+// Panics if the key type is not comparable.
+func (m *Properties) Has(key interface{}) bool {
+	if m.values == nil {
+		return false
+	}
+	_, ok := m.values[key]
+	return ok
+}