Add file interface which follows only File PropertySheet

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35208 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/interfaces/file.py

+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Copyright (c) 2010 Nexedi SA and Contributors. All Rights Reserved.
+#                    Nicolas Delaby <nicolas@nexedi.com>
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsability of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# garantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from zope.interface import Interface
+
+class IFile(Interface):
+  """
+  File interface specification
+
+  Document which implement IFile can reads file and store result in data.
+  """
+
+  def getData(default=None):
+    """
+    return data, content reads from file.
+    """
+
+  def getContentType(default=None):
+    """
+    return content_type, mimetype of data
+    """
+
+  def getSize(default=None):
+    """
+    return size (in bytes) of data
+    """