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## Copyright (c) 2002, Infrae. 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.
## 3. Neither the name of Infrae nor the names of its contributors may
## be used to endorse or promote products derived from this software
## without specific prior written permission.
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "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 INFRAE 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.
from utils import classImplements
from Products.ZCTextIndex.ISplitter import ISplitter
from Products.ZCTextIndex.PipelineFactory import element_factory
import re
enc = 'utf-8'
class Splitter:
__implements__ = ISplitter
rx_L = re.compile(r"\w+", re.LOCALE)
rxGlob_L = re.compile(r"\w+[\w*?]*", re.LOCALE)
rx_U = re.compile(r"\w+", re.UNICODE)
rxGlob_U = re.compile(r"\w+[\w*?]*", re.UNICODE)
def process(self, lst):
result = []
for s in lst:
# This is a hack to get the word splitting working with
# non-unicode text.
try:
if not isinstance(s, unicode):
s = unicode(s, enc)
except (UnicodeDecodeError, TypeError):
# Fall back to locale aware splitter
result += self.rx_L.findall(s)
else:
words = self.rx_U.findall(s)
result += [w.encode(enc) for w in words]
return result
def processGlob(self, lst):
result = []
for s in lst:
# This is a hack to get the word splitting working with
# non-unicode text.
try:
if not isinstance(s, unicode):
s = unicode(s, enc)
except (UnicodeDecodeError, TypeError):
# Fall back to locale aware splitter
result += self.rxGlob_L.findall(s)
else:
words = self.rxGlob_U.findall(s)
result += [w.encode(enc) for w in words]
return result
classImplements(Splitter, Splitter.__implements__)
try:
element_factory.registerFactory('Word Splitter',
'Unicode Whitespace splitter', Splitter)
except ValueError:
# In case the splitter is already registered, ValueError is raised
pass
class CaseNormalizer:
def process(self, lst):
result = []
for s in lst:
# This is a hack to get the normalizer working with
# non-unicode text.
try:
if not isinstance(s, unicode):
s = unicode(s, enc)
except (UnicodeDecodeError, TypeError):
result.append(s.lower())
else:
result.append(s.lower().encode(enc))
return result
try:
element_factory.registerFactory('Case Normalizer',
'Unicode Case Normalizer', CaseNormalizer)
except ValueError:
# In case the normalizer is already registered, ValueError is raised
pass
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