housenumber: Optional[qmod.TokenRange] = None
postcode: Optional[qmod.TokenRange] = None
country: Optional[qmod.TokenRange] = None
- category: Optional[qmod.TokenRange] = None
+ near_item: Optional[qmod.TokenRange] = None
qualifier: Optional[qmod.TokenRange] = None
out.postcode = token.trange
elif token.ttype == qmod.TokenType.COUNTRY:
out.country = token.trange
- elif token.ttype == qmod.TokenType.CATEGORY:
- out.category = token.trange
+ elif token.ttype == qmod.TokenType.NEAR_ITEM:
+ out.near_item = token.trange
elif token.ttype == qmod.TokenType.QUALIFIER:
out.qualifier = token.trange
return out
class _TokenSequence:
- """ Working state used to put together the token assignements.
+ """ Working state used to put together the token assignments.
Represents an intermediate state while traversing the tokenized
query.
"""
# Country and category must be the final term for left-to-right
return len(self.seq) > 1 and \
- self.seq[-1].ttype in (qmod.TokenType.COUNTRY, qmod.TokenType.CATEGORY)
+ self.seq[-1].ttype in (qmod.TokenType.COUNTRY, qmod.TokenType.NEAR_ITEM)
def appendable(self, ttype: qmod.TokenType) -> Optional[int]:
# Name tokens are always acceptable and don't change direction
if ttype == qmod.TokenType.PARTIAL:
+ # qualifiers cannot appear in the middle of the query. They need
+ # to be near the next phrase.
+ if self.direction == -1 \
+ and any(t.ttype == qmod.TokenType.QUALIFIER for t in self.seq[:-1]):
+ return None
return self.direction
# Other tokens may only appear once
if ttype == qmod.TokenType.COUNTRY:
return None if self.direction == -1 else 1
- if ttype == qmod.TokenType.CATEGORY:
+ if ttype == qmod.TokenType.NEAR_ITEM:
return self.direction
if ttype == qmod.TokenType.QUALIFIER:
if self.direction == 1:
if (len(self.seq) == 1
- and self.seq[0].ttype in (qmod.TokenType.PARTIAL, qmod.TokenType.CATEGORY)) \
+ and self.seq[0].ttype in (qmod.TokenType.PARTIAL, qmod.TokenType.NEAR_ITEM)) \
or (len(self.seq) == 2
- and self.seq[0].ttype == qmod.TokenType.CATEGORY
+ and self.seq[0].ttype == qmod.TokenType.NEAR_ITEM
and self.seq[1].ttype == qmod.TokenType.PARTIAL):
return 1
return None
if self.direction == -1:
return -1
- tempseq = self.seq[1:] if self.seq[0].ttype == qmod.TokenType.CATEGORY else self.seq
+ tempseq = self.seq[1:] if self.seq[0].ttype == qmod.TokenType.NEAR_ITEM else self.seq
if len(tempseq) == 0:
return 1
if len(tempseq) == 1 and self.seq[0].ttype == qmod.TokenType.HOUSENUMBER:
def _adapt_penalty_from_priors(self, priors: int, new_dir: int) -> bool:
- if priors == 2:
- self.penalty += 1.0
- elif priors > 2:
+ if priors >= 2:
if self.direction == 0:
self.direction = new_dir
else:
- return False
+ if priors == 2:
+ self.penalty += 0.8
+ else:
+ return False
return True
def recheck_sequence(self) -> bool:
""" Check that the sequence is a fully valid token assignment
- and addapt direction and penalties further if necessary.
+ and adapt direction and penalties further if necessary.
This function catches some impossible assignments that need
- forward context and can therefore not be exluded when building
+ forward context and can therefore not be excluded when building
the assignment.
"""
# housenumbers may not be further than 2 words from the beginning.
priors = sum(1 for t in self.seq[hnrpos+1:] if t.ttype == qmod.TokenType.PARTIAL)
if not self._adapt_penalty_from_priors(priors, 1):
return False
+ if any(t.ttype == qmod.TokenType.NEAR_ITEM for t in self.seq):
+ self.penalty += 1.0
return True
+ def _get_assignments_postcode(self, base: TokenAssignment,
+ query_len: int) -> Iterator[TokenAssignment]:
+ """ Yield possible assignments of Postcode searches with an
+ address component.
+ """
+ assert base.postcode is not None
+
+ if (base.postcode.start == 0 and self.direction != -1)\
+ or (base.postcode.end == query_len and self.direction != 1):
+ log().comment('postcode search')
+ # <address>,<postcode> should give preference to address search
+ if base.postcode.start == 0:
+ penalty = self.penalty
+ self.direction = -1 # name searches are only possible backwards
+ else:
+ penalty = self.penalty + 0.1
+ self.direction = 1 # name searches are only possible forwards
+ yield dataclasses.replace(base, penalty=penalty)
+
+
+ def _get_assignments_address_forward(self, base: TokenAssignment,
+ query: qmod.QueryStruct) -> Iterator[TokenAssignment]:
+ """ Yield possible assignments of address searches with
+ left-to-right reading.
+ """
+ first = base.address[0]
+
+ log().comment('first word = name')
+ yield dataclasses.replace(base, penalty=self.penalty,
+ name=first, address=base.address[1:])
+
+ # To paraphrase:
+ # * if another name term comes after the first one and before the
+ # housenumber
+ # * a qualifier comes after the name
+ # * the containing phrase is strictly typed
+ if (base.housenumber and first.end < base.housenumber.start)\
+ or (base.qualifier and base.qualifier > first)\
+ or (query.nodes[first.start].ptype != qmod.PhraseType.NONE):
+ return
+
+ penalty = self.penalty
+
+ # Penalty for:
+ # * <name>, <street>, <housenumber> , ...
+ # * queries that are comma-separated
+ if (base.housenumber and base.housenumber > first) or len(query.source) > 1:
+ penalty += 0.25
+
+ for i in range(first.start + 1, first.end):
+ name, addr = first.split(i)
+ log().comment(f'split first word = name ({i - first.start})')
+ yield dataclasses.replace(base, name=name, address=[addr] + base.address[1:],
+ penalty=penalty + PENALTY_TOKENCHANGE[query.nodes[i].btype])
+
+
+ def _get_assignments_address_backward(self, base: TokenAssignment,
+ query: qmod.QueryStruct) -> Iterator[TokenAssignment]:
+ """ Yield possible assignments of address searches with
+ right-to-left reading.
+ """
+ last = base.address[-1]
+
+ if self.direction == -1 or len(base.address) > 1:
+ log().comment('last word = name')
+ yield dataclasses.replace(base, penalty=self.penalty,
+ name=last, address=base.address[:-1])
+
+ # To paraphrase:
+ # * if another name term comes before the last one and after the
+ # housenumber
+ # * a qualifier comes before the name
+ # * the containing phrase is strictly typed
+ if (base.housenumber and last.start > base.housenumber.end)\
+ or (base.qualifier and base.qualifier < last)\
+ or (query.nodes[last.start].ptype != qmod.PhraseType.NONE):
+ return
+
+ penalty = self.penalty
+ if base.housenumber and base.housenumber < last:
+ penalty += 0.4
+ if len(query.source) > 1:
+ penalty += 0.25
+
+ for i in range(last.start + 1, last.end):
+ addr, name = last.split(i)
+ log().comment(f'split last word = name ({i - last.start})')
+ yield dataclasses.replace(base, name=name, address=base.address[:-1] + [addr],
+ penalty=penalty + PENALTY_TOKENCHANGE[query.nodes[i].btype])
+
+
def get_assignments(self, query: qmod.QueryStruct) -> Iterator[TokenAssignment]:
""" Yield possible assignments for the current sequence.
"""
base = TokenAssignment.from_ranges(self.seq)
+ num_addr_tokens = sum(t.end - t.start for t in base.address)
+ if num_addr_tokens > 50:
+ return
+
# Postcode search (postcode-only search is covered in next case)
if base.postcode is not None and base.address:
- if (base.postcode.start == 0 and self.direction != -1)\
- or (base.postcode.end == query.num_token_slots() and self.direction != 1):
- log().comment('postcode search')
- yield dataclasses.replace(base, penalty=self.penalty)
+ yield from self._get_assignments_postcode(base, query.num_token_slots())
# Postcode or country-only search
if not base.address:
- if not base.housenumber and (base.postcode or base.country or base.category):
+ if not base.housenumber and (base.postcode or base.country or base.near_item):
log().comment('postcode/country search')
yield dataclasses.replace(base, penalty=self.penalty)
else:
- # Use entire first word as name
- if self.direction != -1:
- log().comment('first word = name')
- yield dataclasses.replace(base, name=base.address[0],
- penalty=self.penalty,
- address=base.address[1:])
-
- # Use entire last word as name
- if self.direction == -1 or (self.direction == 0 and len(base.address) > 1):
- log().comment('last word = name')
- yield dataclasses.replace(base, name=base.address[-1],
- penalty=self.penalty,
- address=base.address[:-1])
+ # <postcode>,<address> should give preference to postcode search
+ if base.postcode and base.postcode.start == 0:
+ self.penalty += 0.1
- # variant for special housenumber searches
- if base.housenumber:
- yield dataclasses.replace(base, penalty=self.penalty)
-
- # Use beginning of first word as name
+ # Right-to-left reading of the address
if self.direction != -1:
- first = base.address[0]
- if (not base.housenumber or first.end >= base.housenumber.start)\
- and (not base.qualifier or first.start >= base.qualifier.end):
- for i in range(first.start + 1, first.end):
- name, addr = first.split(i)
- penalty = self.penalty + PENALTY_TOKENCHANGE[query.nodes[i].btype]
- log().comment(f'split first word = name ({i - first.start})')
- yield dataclasses.replace(base, name=name, penalty=penalty,
- address=[addr] + base.address[1:])
-
- # Use end of last word as name
+ yield from self._get_assignments_address_forward(base, query)
+
+ # Left-to-right reading of the address
if self.direction != 1:
- last = base.address[-1]
- if (not base.housenumber or last.start <= base.housenumber.end)\
- and (not base.qualifier or last.end <= base.qualifier.start):
- for i in range(last.start + 1, last.end):
- addr, name = last.split(i)
- penalty = self.penalty + PENALTY_TOKENCHANGE[query.nodes[i].btype]
- log().comment(f'split last word = name ({i - last.start})')
- yield dataclasses.replace(base, name=name, penalty=penalty,
- address=base.address[:-1] + [addr])
+ yield from self._get_assignments_address_backward(base, query)
+ # variant for special housenumber searches
+ if base.housenumber and not base.qualifier:
+ yield dataclasses.replace(base, penalty=self.penalty)
def yield_token_assignments(query: qmod.QueryStruct) -> Iterator[TokenAssignment]:
projects / nominatim.git / blobdiff