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# Copyright (c) 2006,2007,2008 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
class Query(object):
__local_iter__ = None
def __init__(self, model_class, limit=None, next_token=None, manager=None):
self.model_class = model_class
self.limit = limit
if manager:
self.manager = manager
else:
self.manager = self.model_class._manager
self.filters = []
self.sort_by = None
self.rs = None
self.next_token = next_token
def __iter__(self):
return iter(self.manager.query(self))
def next(self):
if self.__local_iter__ == None:
self.__local_iter__ = self.__iter__()
return self.__local_iter__.next()
def filter(self, property_operator, value):
self.filters.append((property_operator, value))
return self
def fetch(self, limit, offset=0):
raise NotImplementedError, "fetch mode is not currently supported"
def count(self):
return self.manager.count(self.model_class, self.filters)
def order(self, key):
self.sort_by = key
return self
def to_xml(self, doc=None):
if not doc:
xmlmanager = self.model_class.get_xmlmanager()
doc = xmlmanager.new_doc()
for obj in self:
obj.to_xml(doc)
return doc
def get_next_token(self):
if self.rs:
return self.rs.next_token
if self._next_token:
return self._next_token
return None
def set_next_token(self, token):
self._next_token = token
next_token = property(get_next_token, set_next_token)
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