/usr/lib/python2.7/dist-packages/whoosh/legacy.py is in python-whoosh 2.5.7-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | # Copyright 2012 Matt Chaput. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY MATT CHAPUT ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL MATT CHAPUT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# The views and conclusions contained in the software and documentation are
# those of the authors and should not be interpreted as representing official
# policies, either expressed or implied, of Matt Chaput.
"""
This module contains code for maintaining backwards compatibility with old
index formats.
"""
from whoosh.util.loading import RenamingUnpickler
def load_110_toc(stream, gen, schema, version):
# Between version -110 and version -111, I reorganized the modules and
# changed the implementation of the NUMERIC field, so we have to change the
# classes the unpickler tries to load if we need to read an old schema
# Read the length of the pickled schema
picklen = stream.read_varint()
if schema:
# If the user passed us a schema, use it and skip the one on disk
stream.seek(picklen, 1)
else:
# Remap the old classes and functions to their moved versions as we
# unpickle the schema
scuts = {"wf": "whoosh.fields",
"wsn": "whoosh.support.numeric",
"wcw2": "whoosh.codec.whoosh2"}
objmap = {"%(wf)s.NUMERIC": "%(wcw2)s.OLD_NUMERIC",
"%(wf)s.DATETIME": "%(wcw2)s.OLD_DATETIME",
"%(wsn)s.int_to_text": "%(wcw2)s.int_to_text",
"%(wsn)s.text_to_int": "%(wcw2)s.text_to_int",
"%(wsn)s.long_to_text": "%(wcw2)s.long_to_text",
"%(wsn)s.text_to_long": "%(wcw2)s.text_to_long",
"%(wsn)s.float_to_text": "%(wcw2)s.float_to_text",
"%(wsn)s.text_to_float": "%(wcw2)s.text_to_float", }
ru = RenamingUnpickler(stream, objmap, shortcuts=scuts)
schema = ru.load()
# Read the generation number
index_gen = stream.read_int()
assert gen == index_gen
# Unused number
_ = stream.read_int()
# Unpickle the list of segment objects
segments = stream.read_pickle()
return schema, segments
# Map TOC version numbers to functions to load that version
toc_loaders = {-110: load_110_toc}
# Map segment class names to functions to load the segment
segment_loaders = {}
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