Package structure refactor.

internal/jet/projection.go

@@ -0,0 +1,33 @@
+package jet
+
+type Projection interface {
+	serializeForProjection(statement StatementType, out *SqlBuilder) error
+	fromImpl(subQuery SelectTable) Projection
+}
+
+func SerializeForProjection(projection Projection, statementType StatementType, out *SqlBuilder) error {
+	return projection.serializeForProjection(statementType, out)
+}
+
+// ProjectionList is a redefined type, so that ProjectionList can be used as a Projection.
+type ProjectionList []Projection
+
+func (cl ProjectionList) fromImpl(subQuery SelectTable) Projection {
+	newProjectionList := ProjectionList{}
+
+	for _, projection := range cl {
+		newProjectionList = append(newProjectionList, projection.fromImpl(subQuery))
+	}
+
+	return newProjectionList
+}
+
+func (cl ProjectionList) serializeForProjection(statement StatementType, out *SqlBuilder) error {
+	err := SerializeProjectionList(statement, cl, out)
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}