__author__ = 'chunk'

__all__ = ['DataDumperBase', ]

class DataDumperBase(object):
    """
    Base class for image data dumping & retrieving.
    A regular directory pattern would be like this:

        ├── file-tag-list.tsv

        │

        ├── Feat
        │   ├── 0a1
        │   └── 53e
        │   └── ...
        |
        └── Img
            ├── 0a1
            └── 53e
            └── ...

    It can be refractored from the original pattern which is supposed to be generated from web crawlers:

        ├── Neg
        │   ├── aaa.jpg
        │   └── bbb.jpg
        │   └── ...
        |
        └── Pos
            ├── ccc.jpg
            └── ddd.jpg
            └── ...

    convention:
        'img' for image file data while 'image' for file path;

    """

    def __init__(self):
        self.base_dir = None
        self.list_file = None
        self.dict_data = None

        # self.table_name = None
        # self.table = None
        # self.connection = None

    def format(self):
        pass

    def get_table(self, tablename, connection=None):
        pass

    def store_img(self, table):
        pass

    def store_tag(self, table, category):
        pass

    def get_feat(self, category):
        pass

    def store_feat(self, table, category):

        pass