abstract classmethod example

abstract_classmethod.py

from abc import ABC, abstractmethod

class DataSource(ABC):
    @classmethod
    @abstractmethod
    def configure(cls, config):
        """
        Configures database connection parameters. Each subclass must implement this
        method based on its database type specifications.
        """
        pass

    @abstractmethod
    def execute_query(self, query):
        """
        Executes a given query on the database instance. Implementation will vary
        depending on the database type.
        """
        pass

class SQLDataSource(DataSource):
    connection_params = {}

    @classmethod
    def configure(cls, config):
        cls.connection_params = config
        return f"Configured SQL database with parameters: {cls.connection_params}"

    def execute_query(self, query):
        return f"Executing SQL query: '{query}' with parameters {self.connection_params}"

class NoSQLDataSource(DataSource):
    environment_settings = {}

    @classmethod
    def configure(cls, config):
        cls.environment_settings = config
        return f"Configured NoSQL database with settings: {cls.environment_settings}"

    def execute_query(self, query):
        return f"Executing NoSQL query: '{query}' with settings {self.environment_settings}"

# Usage of class methods and instance methods
sql_config = {'host': 'localhost', 'port': 5432}
print(SQLDataSource.configure(sql_config))

nosql_config = {'environment': 'cloud', 'replication': 'enabled'}
print(NoSQLDataSource.configure(nosql_config))

sql_data_source = SQLDataSource()
print(sql_data_source.execute_query("SELECT * FROM users"))

nosql_data_source = NoSQLDataSource()
print(nosql_data_source.execute_query("{find: 'users', filter: {active: true}}"))