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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: Enthought, Inc.
# Description: <Enthought naming package component>
#------------------------------------------------------------------------------
""" The base class for all object serializers. """
# Standard library imports.
import logging
from traceback import print_exc
from os.path import splitext
#import cPickle
#import pickle
# Enthought library imports.
import apptools.sweet_pickle as sweet_pickle
from traits.api import HasTraits, Str
# Setup a logger for this module.
logger = logging.getLogger(__name__)
class ObjectSerializer(HasTraits):
""" The base class for all object serializers. """
#### 'ObjectSerializer' interface #########################################
# The file extension recognized by this serializer.
ext = Str('.pickle')
###########################################################################
# 'ObjectSerializer' interface.
###########################################################################
def can_load(self, path):
""" Returns True if the serializer can load a file. """
rest, ext = splitext(path)
return ext == self.ext
def load(self, path):
""" Loads an object from a file. """
# Unpickle the object.
f = open(path, 'rb')
try:
try:
obj = sweet_pickle.load(f)
# obj = cPickle.load(f)
# obj = pickle.load(f)
except Exception, ex:
print_exc()
logger.exception( "Failed to load pickle file: %s, %s" % (path, ex))
raise
finally:
f.close()
return obj
def can_save(self, obj):
""" Returns True if the serializer can save an object. """
return True
def save(self, path, obj):
""" Saves an object to a file. """
if not path.endswith(self.ext):
actual_path = path + self.ext
else:
actual_path = path
# Pickle the object.
f = open(actual_path, 'wb')
try:
sweet_pickle.dump(obj, f, 1)
# cPickle.dump(obj, f, 1)
# pickle.dump(obj, f, 1)
except Exception, ex:
logger.exception( "Failed to pickle into file: %s, %s, object:%s"
% (path, ex, obj))
print_exc()
f.close()
return actual_path
### EOF #######################################################################
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