151 lines
4.4 KiB
Python
151 lines
4.4 KiB
Python
"""
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Base classes for Algebra system
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SECONDO's extensibility is based on algebras - modules that define
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operators for specific data types and operations.
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"""
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from typing import List, Callable, Optional, Any
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from abc import ABC, abstractmethod
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from pysecondo.core.types import Type
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from pysecondo.core.nested_list import NestedList
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class Operator:
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"""
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Base class for all operators in SECONDO
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Each operator has:
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- name: Operator name (e.g., "+", "filter", "consume")
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- type_map: Function that checks if input types are valid
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- value_map: Function that executes the operator
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The type_map function:
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- Takes list of input types
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- Returns output type if types are valid
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- Raises TypeError if types are invalid
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The value_map function:
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- Takes list of input values (NestedList)
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- Returns result value (NestedList)
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"""
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def __init__(
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self,
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name: str,
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type_map: Callable[[List[Type]], Type],
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value_map: Callable[[List[NestedList]], NestedList],
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description: str = ""
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):
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self.name = name
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self.type_map = type_map
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self.value_map = value_map
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self.description = description
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def __repr__(self) -> str:
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return f"Operator({self.name})"
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class Algebra(ABC):
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"""
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Base class for algebras
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An algebra is a collection of related operators.
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Subclasses must implement the init() method to register operators.
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Example:
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class MyAlgebra(Algebra):
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def init(self):
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self.register_operator(Operator(
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name="myop",
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type_map=self.type_map_myop,
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value_map=self.value_map_myop
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))
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"""
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def __init__(self):
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self.operators: dict[str, Operator] = {}
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self.init()
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@abstractmethod
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def init(self) -> None:
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"""
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Initialize the algebra and register operators
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This method should call self.register_operator() for each operator
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defined in this algebra.
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"""
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pass
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def register_operator(self, op: Operator) -> None:
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"""Register an operator to this algebra"""
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if op.name in self.operators:
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raise ValueError(f"Operator {op.name} already registered")
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self.operators[op.name] = op
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def get_operator(self, name: str) -> Optional[Operator]:
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"""Get operator by name"""
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return self.operators.get(name)
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def list_operators(self) -> List[str]:
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"""List all operator names in this algebra"""
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return list(self.operators.keys())
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class AlgebraManager:
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"""
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Manager for all loaded algebras
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In SECONDO, algebras can be dynamically loaded at runtime.
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The AlgebraManager keeps track of all loaded algebras and their operators.
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"""
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def __init__(self):
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self.algebras: dict[str, Algebra] = {}
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self.operator_index: dict[str, tuple[Algebra, Operator]] = {}
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# Maps operator name -> (algebra, operator)
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def register_algebra(self, name: str, algebra: Algebra) -> None:
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"""
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Register a new algebra
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Args:
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name: Algebra name (e.g., "StandardAlgebra")
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algebra: Algebra instance
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"""
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if name in self.algebras:
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raise ValueError(f"Algebra {name} already registered")
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self.algebras[name] = algebra
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# Index all operators from this algebra
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for op_name, operator in algebra.operators.items():
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if op_name in self.operator_index:
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existing_alg, _ = self.operator_index[op_name]
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raise ValueError(
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f"Operator {op_name} already defined in {existing_alg}"
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)
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self.operator_index[op_name] = (algebra, operator)
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def get_operator(self, name: str) -> Optional[Operator]:
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"""Get operator by name"""
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result = self.operator_index.get(name)
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if result:
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return result[1]
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return None
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def get_algebra_for_operator(self, name: str) -> Optional[Algebra]:
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"""Get the algebra that provides an operator"""
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result = self.operator_index.get(name)
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if result:
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return result[0]
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return None
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def list_operators(self) -> List[str]:
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"""List all available operators"""
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return list(self.operator_index.keys())
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def list_algebras(self) -> List[str]:
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"""List all registered algebras"""
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return list(self.algebras.keys())
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