Initial implementation of OCR pluggable backends

mayan/apps/ocr/backends/__init__.py

@@ -0,0 +1,26 @@
+from __future__ import absolute_import
+
+from django.utils.importlib import import_module
+
+from ..conf.settings import BACKEND
+
+
+class BackendBase(object):
+    def execute(input_filename, language=None):
+        raise NotImplemented
+
+
+def get_ocr_backend():
+    """
+    Return the OCR backend using the path specified in the configuration
+    settings
+    """
+    try:
+        module = import_module(BACKEND)
+    except ImportError:
+        sys.stderr.write(u'\nWarning: No OCR backend named: %s\n\n' % BACKEND)
+        raise
+    else:
+        return module
+
+ocr_backend = get_ocr_backend()