18d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoifrom boto.compat import six
28d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# Copyright (c) 2006,2007 Mitch Garnaat http://garnaat.org/
38d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi#
48d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# Permission is hereby granted, free of charge, to any person obtaining a
58d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# copy of this software and associated documentation files (the
68d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# "Software"), to deal in the Software without restriction, including
78d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# without limitation the rights to use, copy, modify, merge, publish, dis-
88d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# tribute, sublicense, and/or sell copies of the Software, and to permit
98d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# persons to whom the Software is furnished to do so, subject to the fol-
108d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# lowing conditions:
118d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi#
128d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# The above copyright notice and this permission notice shall be included
138d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# in all copies or substantial portions of the Software.
148d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi#
158d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
168d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
178d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
188d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
198d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
208d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
218d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi# IN THE SOFTWARE.
228d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
238d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoidef query_lister(domain, query='', max_items=None, attr_names=None):
248d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    more_results = True
258d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    num_results = 0
268d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    next_token = None
278d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    while more_results:
288d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        rs = domain.connection.query_with_attributes(domain, query, attr_names,
298d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                                                     next_token=next_token)
308d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        for item in rs:
318d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            if max_items:
328d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                if num_results == max_items:
338d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                    raise StopIteration
348d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            yield item
358d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            num_results += 1
368d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        next_token = rs.next_token
378d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        more_results = next_token is not None
388d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
398d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoiclass QueryResultSet(object):
408d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
418d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    def __init__(self, domain=None, query='', max_items=None, attr_names=None):
428d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.max_items = max_items
438d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.domain = domain
448d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.query = query
458d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.attr_names = attr_names
468d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
478d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    def __iter__(self):
488d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        return query_lister(self.domain, self.query, self.max_items, self.attr_names)
498d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
508d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoidef select_lister(domain, query='', max_items=None):
518d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    more_results = True
528d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    num_results = 0
538d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    next_token = None
548d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    while more_results:
558d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        rs = domain.connection.select(domain, query, next_token=next_token)
568d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        for item in rs:
578d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            if max_items:
588d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                if num_results == max_items:
598d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                    raise StopIteration
608d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            yield item
618d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            num_results += 1
628d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        next_token = rs.next_token
638d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        more_results = next_token is not None
648d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
658d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoiclass SelectResultSet(object):
668d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
678d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    def __init__(self, domain=None, query='', max_items=None,
688d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                 next_token=None, consistent_read=False):
698d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.domain = domain
708d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.query = query
718d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.consistent_read = consistent_read
728d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.max_items = max_items
738d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        self.next_token = next_token
748d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
758d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    def __iter__(self):
768d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        more_results = True
778d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        num_results = 0
788d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        while more_results:
798d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            rs = self.domain.connection.select(self.domain, self.query,
808d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                                               next_token=self.next_token,
818d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                                               consistent_read=self.consistent_read)
828d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            for item in rs:
838d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                if self.max_items and num_results >= self.max_items:
848d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                    raise StopIteration
858d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                yield item
868d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                num_results += 1
878d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            self.next_token = rs.next_token
888d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            if self.max_items and num_results >= self.max_items:
898d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi                raise StopIteration
908d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi            more_results = self.next_token is not None
918d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi
928d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi    def next(self):
938d2b206a675ec20ea07100c35df34e65ee1e45e8Ruchi Kandoi        return next(self.__iter__())
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