forked from elastic/eland
/
filter.py
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filter.py
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# Licensed to Elasticsearch B.V under one or more agreements.
# Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
# See the LICENSE file in the project root for more information
# Originally based on code in MIT-licensed pandasticsearch filters
from typing import Dict, Any, List, Optional, Union, cast
class BooleanFilter:
def __init__(self) -> None:
self._filter: Dict[str, Any] = {}
def __and__(self, x: "BooleanFilter") -> "BooleanFilter":
if tuple(self.subtree.keys()) == ("must",):
if "bool" in self._filter:
self.subtree["must"].append(x.build())
else:
self.subtree["must"].append(x.subtree)
return self
elif tuple(x.subtree.keys()) == ("must",):
if "bool" in x._filter:
x.subtree["must"].append(self.build())
else:
x.subtree["must"].append(self.subtree)
return x
return AndFilter(self, x)
def __or__(self, x: "BooleanFilter") -> "BooleanFilter":
if tuple(self.subtree.keys()) == ("should",):
if "bool" in x._filter:
self.subtree["should"].append(x.build())
else:
self.subtree["should"].append(x.subtree)
return self
elif tuple(x.subtree.keys()) == ("should",):
if "bool" in self._filter:
x.subtree["should"].append(self.build())
else:
x.subtree["should"].append(self.subtree)
return x
return OrFilter(self, x)
def __invert__(self) -> "BooleanFilter":
return NotFilter(self)
def empty(self) -> bool:
return not bool(self._filter)
def __repr__(self) -> str:
return str(self.build())
@property
def subtree(self) -> Dict[str, Any]:
if "bool" in self._filter:
return cast(Dict[str, Any], self._filter["bool"])
else:
return self._filter
def build(self) -> Dict[str, Any]:
return self._filter
# Binary operator
class AndFilter(BooleanFilter):
def __init__(self, *args: BooleanFilter) -> None:
super().__init__()
self._filter = {"bool": {"must": [x.build() for x in args]}}
class OrFilter(BooleanFilter):
def __init__(self, *args: BooleanFilter) -> None:
super().__init__()
self._filter = {"bool": {"should": [x.build() for x in args]}}
class NotFilter(BooleanFilter):
def __init__(self, x: BooleanFilter) -> None:
super().__init__()
self._filter = {"bool": {"must_not": x.build()}}
# LeafBooleanFilter
class GreaterEqual(BooleanFilter):
def __init__(self, field: str, value: Any) -> None:
super().__init__()
self._filter = {"range": {field: {"gte": value}}}
class Greater(BooleanFilter):
def __init__(self, field: str, value: Any) -> None:
super().__init__()
self._filter = {"range": {field: {"gt": value}}}
class LessEqual(BooleanFilter):
def __init__(self, field: str, value: Any) -> None:
super().__init__()
self._filter = {"range": {field: {"lte": value}}}
class Less(BooleanFilter):
def __init__(self, field: str, value: Any) -> None:
super().__init__()
self._filter = {"range": {field: {"lt": value}}}
class Equal(BooleanFilter):
def __init__(self, field: str, value: Any) -> None:
super().__init__()
self._filter = {"term": {field: value}}
class IsIn(BooleanFilter):
def __init__(self, field: str, value: List[Any]) -> None:
super().__init__()
if field == "ids":
self._filter = {"ids": {"values": value}}
else:
self._filter = {"terms": {field: value}}
class Like(BooleanFilter):
def __init__(self, field: str, value: str) -> None:
super().__init__()
self._filter = {"wildcard": {field: value}}
class Rlike(BooleanFilter):
def __init__(self, field: str, value: str) -> None:
super().__init__()
self._filter = {"regexp": {field: value}}
class Startswith(BooleanFilter):
def __init__(self, field: str, value: str) -> None:
super().__init__()
self._filter = {"prefix": {field: value}}
class IsNull(BooleanFilter):
def __init__(self, field: str) -> None:
super().__init__()
self._filter = {"bool": {"must_not": {"exists": {"field": field}}}}
class NotNull(BooleanFilter):
def __init__(self, field: str) -> None:
super().__init__()
self._filter = {"exists": {"field": field}}
class ScriptFilter(BooleanFilter):
def __init__(
self,
inline: str,
lang: Optional[str] = None,
params: Optional[Dict[str, Any]] = None,
) -> None:
super().__init__()
script: Dict[str, Union[str, Dict[str, Any]]] = {"source": inline}
if lang is not None:
script["lang"] = lang
if params is not None:
script["params"] = params
self._filter = {"script": {"script": script}}
class QueryFilter(BooleanFilter):
def __init__(self, query: Dict[str, Any]) -> None:
super().__init__()
self._filter = query
class MatchAllFilter(QueryFilter):
def __init__(self) -> None:
super().__init__({"match_all": {}})
class RandomScoreFilter(QueryFilter):
def __init__(self, query: BooleanFilter, random_state: int) -> None:
q = MatchAllFilter() if query.empty() else query
seed = {}
if random_state is not None:
seed = {"seed": random_state, "field": "_seq_no"}
super().__init__({"function_score": {"query": q.build(), "random_score": seed}})