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# -*- coding: iso-8859-1 -*-
# This file is part of pybliographer
#
# Copyright (C) 1998-2004 Frederic GOBRY
# Email : gobry@pybliographer.org
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
#
from Pyblio import Fields, Types
import re, string, time
class Sort:
''' This class defines the methods used to sort a database '''
def __init__ (self, fields = None):
''' Create a Sort class with a given set of SortFields '''
self.fields = fields or []
return
def sort (self, iterator):
''' Returns a list of keys sorted according to the current
sort settings '''
self.base = iterator.base
S = []
extractors = [f.get_extractor() for f in self.fields]
for e in iterator:
s = []
for f in extractors:
s.extend (f (e))
s.append (e)
S.append (s)
S.sort ()
result = [x [-1] for x in S]
return result
def __repr__ (self):
return 'Sort (%s)' % str (self.fields)
class AnySort (object):
def __init__ (self, ascend = 1):
self.ascend = ascend
return
def get_extractor (self, extractor=None):
extractor = extractor or self.extractor
if self.ascend < 0:
return lambda e: map (
lambda S: ''.join([unichr(~ord(c) & 65535) for c in S]),
extractor (e))
else :
return extractor
class TypeSort (AnySort):
def get_field (self, entry):
return entry.type
def __repr__ (self):
return 'TypeSort (%d)' % self.ascend
def __cmp__ (self, other):
if isinstance (other, TypeSort): return 0
return -1
def extractor (self, entry):
return [str(entry.type).lower()]
class KeySort (AnySort):
def get_field (self, entry):
return entry.key
def __repr__ (self):
return 'KeySort (%d)' % self.ascend
def __cmp__ (self, other):
if isinstance (other, KeySort): return 0
return -1
def extractor (self, entry):
return [str(entry.key).lower()]
class FieldSort (AnySort):
def __init__ (self, field, ascend = 1):
self.field = field
AnySort.__init__ (self, ascend)
def get_extractor (self):
field = self.field
if field == 'date':
if self.ascend < 0:
return lambda x: [- self.date_extractor(x) [0]]
else: return self.date_extractor
elif field == '-author/editor-':
return AnySort.get_extractor (
self, self.author_editor_extractor)
elif field in ['author', 'editor']:
return AnySort.get_extractor (
self,
lambda entry: map (
rakify, entry.get(field, [])))
else:
return AnySort.get_extractor(self)
def get_field (self, entry):
try:
return entry [self.field]
except KeyError:
return Types.get_field (self.field).type ('')
def __repr__ (self):
return 'FieldSort (%s, %d)' % (`self.field`, self.ascend)
def __cmp__ (self, other):
if not hasattr (other, 'field'): return -1
return cmp (string.lower (self.field),
string.lower (other.field))
def extractor (self, entry):
try:
return [str(entry[self.field]).rstrip().lower()]
except KeyError :
return []
def author_editor_extractor (self, entry):
return map (rakify, entry.get('author', entry.get('editor', [])))
def date_extractor (self, entry):
d = entry.get('date', 0)
try:
return [d.asInt()]
except AttributeError:
return [0]
def rakify (author):
s = "%s,%s" %(author.last,author.first)
s = s.lower()
Z = []
for c in s:
if c in '':
n = ''.index (c)
Z.append ('%ce' % ('aouAOU' [n]))
elif c == '':
Z.append ('ss')
elif c in '-./':
Z.append (' ')
else:
Z.append (c)
S = ''.join (Z)
S = re.sub(' +', ' ', S)
return S
|
