66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
# Copyright 2010 Matt Chaput. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY MATT CHAPUT ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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# EVENT SHALL MATT CHAPUT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and documentation are
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# those of the authors and should not be interpreted as representing official
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# policies, either expressed or implied, of Matt Chaput.
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"""
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This module contains common utility objects/functions for the other query
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parser modules.
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"""
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import sys
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from whoosh.compat import string_type
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class QueryParserError(Exception):
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def __init__(self, cause, msg=None):
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super(QueryParserError, self).__init__(str(cause))
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self.cause = cause
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def get_single_text(field, text, **kwargs):
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"""Returns the first token from an analyzer's output.
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"""
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for t in field.process_text(text, mode="query", **kwargs):
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return t
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def attach(q, stxnode):
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if q:
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try:
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q.startchar = stxnode.startchar
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q.endchar = stxnode.endchar
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except AttributeError:
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raise AttributeError("Can't set attribute on %s"
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% q.__class__.__name__)
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return q
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def print_debug(level, msg, out=sys.stderr):
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if level:
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out.write("%s%s\n" % (" " * (level - 1), msg))
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