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# type: ignore |
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"""Define few operator.""" |
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from typing import Any, List, Tuple |
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from .definition import Evaluator, OperatoryArity, Path, register_operator |
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def lookup_path(context: Any, sub_paths: Path) -> Tuple[bool, Any]: |
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"""Lookup attributs in a context like dictionary. |
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Arguments: |
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context (Any): a dictionnary like structure with in and [] methods |
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(support __contains__ or (__iter__ and __getitem__)). |
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sub_paths (Path): a path (single string or an ordered tuple of string) |
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Returns: |
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(Tuple[bool, Any]): (True, attribut value ) or (False, None) if path not found |
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Exceptions: |
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(RuntimeError): if context did not compliant |
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""" |
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if not context: |
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return (False, None) |
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if not (hasattr(context, "__contains__") or (hasattr(context, "__iter__") and hasattr(context, "__getitem__"))): |
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raise RuntimeError('Context must be dictionnary like') |
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if isinstance(sub_paths, Tuple): |
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if sub_paths: |
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# len > 0 |
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current = context |
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i = 0 |
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while i < len(sub_paths): |
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p = sub_paths[i] |
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if not current or p not in current: |
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return (False, None) |
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i += 1 |
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current = current[p] |
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return (True, current) |
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return (False, None) |
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# simple string |
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match = sub_paths in context |
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return (match, context[sub_paths] if match else None) |
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@register_operator(name="has", arity=OperatoryArity.BINARY, profile=[Any, Path]) |
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def op_has(context: Any, path: Path) -> bool: |
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"""Check if path exists in context.""" |
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(match, _) = lookup_path(context, path) |
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return match |
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@register_operator(name="contains", arity=OperatoryArity.TERNARY, profile=[Any, Path, str]) |
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def op_contains(context: Any, path: Path, value: str) -> bool: |
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"""Check if attribut (specifed with path) exists and contains specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value.find(value) != -1 |
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@register_operator(name="eq", alias="==", arity=OperatoryArity.TERNARY, profile=[Any, Path, Any]) |
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def op_eq(context: Any, path: Path, value: Any) -> bool: |
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"""Check if attribut (specifed with path) exists and equals specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value == value |
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@register_operator(name="neq", alias="!=", arity=OperatoryArity.TERNARY, profile=[Any, Path, Any]) |
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def op_neq(context: Any, path: Path, value: Any) -> bool: |
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"""Check if attribut (specifed with path) did not exists or not equals specified value.""" |
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return not op_eq(context, path, value) |
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@register_operator(name="gt", alias=">", arity=OperatoryArity.TERNARY, profile=[Any, Path, Any]) |
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def op_gt(context: Any, path: Path, value: Any) -> bool: |
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"""Check if attribut (specifed with path) exists and greather that specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value > value |
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@register_operator(name="lt", alias="<", arity=OperatoryArity.TERNARY, profile=[Any, Path, Any]) |
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def op_lt(context: Any, path: Path, value: Any) -> bool: |
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"""Check if attribut (specifed with path) exists and lower that specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value < value |
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@register_operator(name="gte", alias=">=", arity=OperatoryArity.TERNARY, profile=[Any, Path, Any]) |
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def op_gte(context: Any, path: Path, value: Any) -> bool: |
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"""Check if attribut (specifed with path) exists and greather or equals that specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value >= value |
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@register_operator(name="lte", alias="<=", arity=OperatoryArity.TERNARY, profile=[Any, Path, Any]) |
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def op_lte(context: Any, path: Path, value: Any) -> bool: |
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"""Check if attribut (specifed with path) exists and lower or equals that specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value <= value |
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@register_operator(name="in", alias=":=", arity=OperatoryArity.TERNARY, profile=[Any, Path, List[Any]]) |
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def op_in(context: Any, path: Path, value: List[Any]) -> bool: |
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"""Check if attribut (specifed with path) exists and attribut value in specified value.""" |
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(match, _current_value) = lookup_path(context, path) |
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return match and _current_value in value |
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@register_operator(name="and", alias="&&", arity=OperatoryArity.NARY, combinator=True, profile=[Any, Evaluator]) |
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def op_and(context: Any, *filters: Evaluator) -> bool: |
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"""Define And operator.""" |
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for f in filters: |
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if not f(context): |
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return False |
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return True |
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@register_operator(name="or", alias="||", arity=OperatoryArity.NARY, combinator=True, profile=[Any, Evaluator]) |
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def op_or(context: Any, *filters: Evaluator) -> bool: |
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"""Define Or operator.""" |
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for f in filters: |
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if f(context): |
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return True |
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return False |
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@register_operator(name="xor", arity=OperatoryArity.NARY, combinator=True, profile=[Any, Evaluator]) |
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def op_xor(context: Any, *filters: Evaluator) -> bool: |
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"""Define Xor operator.""" |
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is_true = False |
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for f in filters: |
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_test = f(context) |
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is_true = (is_true and not _test) or (not is_true and _test) |
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return is_true |
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@register_operator(name="nxor", arity=OperatoryArity.NARY, combinator=True, profile=[Any, Evaluator]) |
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def op_nxor(context: Any, *filters: Evaluator) -> bool: |
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"""Define nxor operator.""" |
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return not op_xor(context, *filters) |
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@register_operator(name="not", arity=OperatoryArity.BINARY, combinator=True, profile=[Any, Evaluator], alias="!") |
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def op_not(context: Any, a_filter: Evaluator) -> bool: |
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"""Define Not operator.""" |
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return not a_filter(context) |
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geronimo-iia /
networkx-query
