1 files changed, 84 insertions, 0 deletions
diff --git a/pylint/interfaces.py b/pylint/interfaces.py
new file mode 100644
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+++ b/pylint/interfaces.py
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+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+"""Interfaces for Pylint objects"""
+from collections import namedtuple
+
+from logilab.common.interface import Interface
+
+Confidence = namedtuple('Confidence', ['name', 'description'])
+# Warning Certainties
+HIGH = Confidence('HIGH', 'No false positive possible.')
+INFERENCE = Confidence('INFERENCE', 'Warning based on inference result.')
+INFERENCE_FAILURE = Confidence('INFERENCE_FAILURE',
+                               'Warning based on inference with failures.')
+UNDEFINED = Confidence('UNDEFINED',
+                       'Warning without any associated confidence level.')
+
+CONFIDENCE_LEVELS = [HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED]
+
+
+class IChecker(Interface):
+    """This is an base interface, not designed to be used elsewhere than for
+    sub interfaces definition.
+    """
+
+    def open(self):
+        """called before visiting project (i.e set of modules)"""
+
+    def close(self):
+        """called after visiting project (i.e set of modules)"""
+
+
+class IRawChecker(IChecker):
+    """interface for checker which need to parse the raw file
+    """
+
+    def process_module(self, astroid):
+        """ process a module
+
+        the module's content is accessible via astroid.stream
+        """
+
+
+class ITokenChecker(IChecker):
+    """Interface for checkers that need access to the token list."""
+    def process_tokens(self, tokens):
+        """Process a module.
+
+        tokens is a list of all source code tokens in the file.
+        """
+
+
+class IAstroidChecker(IChecker):
+    """ interface for checker which prefers receive events according to
+    statement type
+    """
+
+
+class IReporter(Interface):
+    """ reporter collect messages and display results encapsulated in a layout
+    """
+    def add_message(self, msg_id, location, msg):
+        """add a message of a given type
+
+        msg_id is a message identifier
+        location is a 3-uple (module, object, line)
+        msg is the actual message
+        """
+
+    def display_results(self, layout):
+        """display results encapsulated in the layout tree
+        """
+
+
+__all__ = ('IRawChecker', 'IAstroidChecker', 'ITokenChecker', 'IReporter')