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# Copyright 2014 Lars Wirzenius
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
class Metadata(object):
def __init__(self):
self._data = {}
def keys(self):
return self._data.keys()
def add(self, key, value):
self._data[key] = self._data.get(key, []) + [value]
def get_all_values(self, key):
return self._data[key]
def get_first_value(self, key, default=None):
if key in self._data:
return self._data[key][0]
return default
def remove(self, key, value):
self._data[key].remove(value)
if not self._data[key]:
del self._data[key]
def remove_all_values(self, key):
del self._data[key]
def __contains__(self, key):
return key in self._data
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