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-rw-r--r--text_recognizer/data/mappings/base.py37
1 files changed, 37 insertions, 0 deletions
diff --git a/text_recognizer/data/mappings/base.py b/text_recognizer/data/mappings/base.py
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+++ b/text_recognizer/data/mappings/base.py
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+"""Mapping to and from word pieces."""
+from abc import ABC, abstractmethod
+from typing import Dict, List
+
+from torch import Tensor
+
+
+class AbstractMapping(ABC):
+ def __init__(
+ self, input_size: List[int], mapping: List[str], inverse_mapping: Dict[str, int]
+ ) -> None:
+ self.input_size = input_size
+ self.mapping = mapping
+ self.inverse_mapping = inverse_mapping
+
+ def __len__(self) -> int:
+ return len(self.mapping)
+
+ @property
+ def num_classes(self) -> int:
+ return self.__len__()
+
+ @abstractmethod
+ def get_token(self, *args, **kwargs) -> str:
+ ...
+
+ @abstractmethod
+ def get_index(self, *args, **kwargs) -> Tensor:
+ ...
+
+ @abstractmethod
+ def get_text(self, *args, **kwargs) -> str:
+ ...
+
+ @abstractmethod
+ def get_indices(self, *args, **kwargs) -> Tensor:
+ ...