def __init__(self, expr=r"(?P<rel>(<=|>=|<|>|=<|=>))"):
"""
:param expr: a regular expression that must capture a "rel" group
(which contains <, >, >=, <=, =>, or =<)
"""
self.expr = rcompile(expr)
def __init__(self, expr=r"(?P<rel>(<=|>=|<|>|=<|=>))"):
"""
:param expr: a regular expression that must capture a "rel" group
(which contains <, >, >=, <=, =>, or =<)
"""
self.expr = rcompile(expr)
class Word(BasicSyntax):
"""Syntax object representing a term.
"""
expr = rcompile("[^ \t\r\n)]+")
tokenize = True
removestops = True
def __init__(self, expr, grouptype, left_assoc=True):
"""
:param expr: a pattern string or compiled expression of the token text.
:param grouptype: a :class:`Group` subclass that should be created to
contain objects affected by the operator.
"""
self.expr = rcompile(expr)
self.grouptype = grouptype
self.left_assoc = left_assoc
def __init__(self, expr, grouptype, left_assoc=True):
"""
:param expr: a pattern string or compiled expression of the token text.
:param grouptype: a :class:`Group` subclass that should be created to
contain objects affected by the operator.
"""
self.expr = rcompile(expr)
self.grouptype = grouptype
self.left_assoc = left_assoc
class Prefix(BasicSyntax):
expr = rcompile("[^ \t\r\n*]+\\*(?= |$|\\))")
qclass = query.Prefix
def __repr__(self):
r = "%s:pre(%r)" % (self.fieldname, self.text)
if self.boost != 1.0:
r += "^%s" % self.boost
return r
@classmethod
def create(cls, parser, match):
return cls(match.group(0)[:-1])
class Field(Token):
expr = rcompile(r"(?P<fieldname>\w+):")
def __init__(self, fieldname, original):
self.fieldname = fieldname
self.original = original
def __repr__(self):
return "<%s:>" % self.fieldname
@classmethod
def create(cls, parser, match):
fieldname = match.group("fieldname")
return cls(fieldname, match.group(0))
class Boost(Token):
expr = rcompile("\\^([0-9]+(.[0-9]+)?)($|(?=[ \t\r\n]))")
def __init__(self, original, boost):
self.original = original
self.boost = boost
def __repr__(self):
return "<^%s>" % self.boost
@classmethod
def create(cls, parser, match):
try:
return cls(match.group(0), float(match.group(1)))
except ValueError:
return Word(match.group(0))
class Wild(BasicSyntax):
# \u055E = Armenian question mark
# \u061F = Arabic question mark
# \u1367 = Ethiopic question mark
expr = rcompile(
u"[^ \t\r\n*?\u055E\u061F\u1367]*[*?\u055E\u061F\u1367]\\S*")
qclass = query.Wildcard
def __repr__(self):
r = "%s:wild(%r)" % (self.fieldname, self.text)
if self.boost != 1.0:
r += "^%s" % self.boost
return r
@classmethod
def create(cls, parser, match):
return cls(match.group(0))
class Field(Token):
expr = rcompile(u"(\w[\w\d]*):")
def __init__(self, fieldname):
self.fieldname = fieldname
def __repr__(self):
return "<%s:>" % self.fieldname
def set_fieldname(self, fieldname, force=False):
return self.__class__(fieldname)
@classmethod
def create(cls, parser, match):
fieldname = match.group(1)
if not parser.schema or fieldname == "*" or (fieldname
in parser.schema):
return cls(fieldname)
class Wild(BasicSyntax):
# Any number of word chars, followed by at least one question mark or
# star, followed by any number of word chars, question marks, or stars
# \u055E = Armenian question mark
# \u061F = Arabic question mark
# \u1367 = Ethiopic question mark
expr = rcompile(
u"\\w*[*?\u055E\u061F\u1367](\\w|[*?\u055E\u061F\u1367])*")
qclass = query.Wildcard
def __repr__(self):
r = "%s:wild(%r)" % (self.fieldname, self.text)
if self.boost != 1.0:
r += "^%s" % self.boost
return r
@classmethod
def create(cls, parser, match):
return cls(match.group(0))
class Quotes(BasicSyntax):
expr = rcompile('"(.*?)"')
def __init__(self, text, fieldname=None, boost=1.0, slop=1):
super(PhrasePlugin.Quotes, self).__init__(text,
fieldname=fieldname,
boost=boost)
self.slop = slop
def __repr__(self):
r = "%s:q(%r)" % (self.fieldname, self.text)
if self.boost != 1.0:
r += "^%s" % self.boost
return r
@classmethod
def create(cls, parser, match):
slop = 1
#if match.group(5):
# try:
# slop = int(match.group(5))
# except ValueError:
# pass
return cls(match.group(1), slop=slop)
def query(self, parser):
fieldname = self.fieldname or parser.fieldname
if parser.schema and fieldname in parser.schema:
field = parser.schema[fieldname]
#if field.self_parsing():
# return field.parse_query(fieldname, self.text, boost=self.boost)
#else:
words = list(field.process_text(self.text, mode="query"))
else:
words = self.text.split(" ")
return parser.phraseclass(fieldname,
words,
boost=self.boost,
slop=self.slop)
class Not(Singleton):
expr = rcompile(token)
class White(Singleton):
expr = rcompile("\\s+")
class SingleQuotes(Token):
expr = rcompile(r"(^|(?<=\W))'(.*?)'(?=\s|\]|[)}]|$)")
@classmethod
def create(cls, parser, match):
return Word(match.group(2))
class Open(Singleton):
expr = rcompile("\\(")
class Minus(Singleton):
expr = rcompile("-")
class Plus(Singleton):
expr = rcompile("\\+")
class Close(Singleton):
expr = rcompile("\\)")
class Range(Token):
expr = rcompile(
r"""
(?P<open>\{|\[) # Open paren
( # Begin optional "start"
( # Begin choice between start1 and start2
('(?P<start2>[^']+)') # Quoted start
| (?P<start1>[^ ]+) # ...or regular start
) # End choice
[ ]+)? # Space at end of optional "start"
[Tt][Oo] # "to" between start and end
([ ]+ # Space at start of optional "end"
( # Begin choice between end1 and end2
('(?P<end2>[^']+)') # Quoted end
| (?P<end1>[^\]\}]*) # ...or normal end
) # End choice
)? # End of optional "end
(?P<close>\}|\]) # Close paren
""", re.VERBOSE)
def __init__(self,
start,
end,
startexcl,
endexcl,
fieldname=None,
boost=1.0):
self.fieldname = fieldname
self.start = start
self.end = end
self.startexcl = startexcl
self.endexcl = endexcl
self.boost = boost
def set_boost(self, b):
return self.__class__(self.start,
self.end,
self.startexcl,
self.endexcl,
fieldname=self.fieldname,
boost=b)
def set_fieldname(self, name, force=False):
if force or self.fieldname is None:
return self.__class__(self.start,
self.end,
self.startexcl,
self.endexcl,
fieldname=name,
boost=self.boost)
else:
return self
def __repr__(self):
r = "%s:(%r, %r, %s, %s)" % (self.fieldname, self.start, self.end,
self.startexcl, self.endexcl)
if self.boost != 1.0:
r += "^%s" % self.boost
return r
@classmethod
def create(cls, parser, match):
start = match.group("start2") or match.group("start1")
end = match.group("end2") or match.group("end1")
return cls(start,
end,
startexcl=match.group("open") == "{",
endexcl=match.group("close") == "}")
def query(self, parser):
fieldname = self.fieldname or parser.fieldname
start, end = self.start, self.end
if parser.schema and fieldname in parser.schema:
field = parser.schema[fieldname]
if field.self_parsing():
try:
rangeq = field.parse_range(fieldname,
start,
end,
self.startexcl,
self.endexcl,
boost=self.boost)
if rangeq is not None:
return rangeq
except QueryParserError, e:
return query.NullQuery
if start:
start = get_single_text(field,
start,
tokenize=False,
removestops=False)
if end:
end = get_single_text(field,
end,
tokenize=False,
removestops=False)
if start is None:
start = u''
if end is None:
end = u'\uFFFF'
return query.TermRange(fieldname,
start,
end,
self.startexcl,
self.endexcl,
boost=self.boost)
