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# (Be in -*- python -*- mode.)
#
# ====================================================================
# Copyright (c) 2000-2009 CollabNet. All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://subversion.tigris.org/license-1.html.
# If newer versions of this license are posted there, you may use a
# newer version instead, at your option.
#
# This software consists of voluntary contributions made by many
# individuals. For exact contribution history, see the revision
# history and logs, available at http://cvs2svn.tigris.org/.
# ====================================================================
"""This module contains database facilities used by cvs2svn."""
import cPickle
from cvs2svn_lib import config
from cvs2svn_lib.common import DB_OPEN_READ
from cvs2svn_lib.common import DB_OPEN_NEW
from cvs2svn_lib.artifact_manager import artifact_manager
class CVSFileDatabase:
"""A database to store CVSFile objects and retrieve them by their id."""
def __init__(self, mode):
"""Initialize an instance, opening database in MODE (where MODE is
either DB_OPEN_NEW or DB_OPEN_READ)."""
self.mode = mode
# A map { id : CVSFile }
self._cvs_files = {}
if self.mode == DB_OPEN_NEW:
pass
elif self.mode == DB_OPEN_READ:
f = open(artifact_manager.get_temp_file(config.CVS_FILES_DB), 'rb')
cvs_files = cPickle.load(f)
for cvs_file in cvs_files:
self._cvs_files[cvs_file.id] = cvs_file
else:
raise RuntimeError('Invalid mode %r' % self.mode)
def log_file(self, cvs_file):
"""Add CVS_FILE, a CVSFile instance, to the database."""
if self.mode == DB_OPEN_READ:
raise RuntimeError('Cannot write items in mode %r' % self.mode)
self._cvs_files[cvs_file.id] = cvs_file
def itervalues(self):
for value in self._cvs_files.itervalues():
yield value
def get_file(self, id):
"""Return the CVSFile with the specified ID."""
return self._cvs_files[id]
def close(self):
if self.mode == DB_OPEN_NEW:
f = open(artifact_manager.get_temp_file(config.CVS_FILES_DB), 'wb')
cPickle.dump(self._cvs_files.values(), f, -1)
f.close()
self._cvs_files = None
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