Github user omalley commented on a diff in the pull request: https://github.com/apache/orc/pull/41#discussion_r71377966 --- Diff: c++/include/orc/Reader.hh --- @@ -645,7 +645,72 @@ namespace orc { }; /** - * The interface for reading ORC files. + * The interface for reading rows in ORC files. + * This is an an abstract class that will subclassed as necessary. + */ + class RowReader { + public: + virtual ~RowReader(); + /** + * Get the selected type of the rows in the file. The file's row type + * is projected down to just the selected columns. Thus, if the file's + * type is struct<col0:int,col1:double,col2:string> and the selected + * columns are "col0,col2" the selected type would be + * struct<col0:int,col2:string>. + * @return the root type + */ + virtual const Type& getSelectedType() const = 0; + + /** + * Get the selected columns of the file. + */ + virtual const std::vector<bool> getSelectedColumns() const = 0; + --- End diff -- You have some trailing spaces. You can probably configure your IDE to automatically trim them.
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