objectfactory is a python package to easily implement the factory design pattern for object creation, serialization, and polymorphism

Last update: Dec 14, 2022

Overview

py-object-factory

objectfactory is a python package to easily implement the factory design pattern for object creation, serialization, and polymorphism

designed to support polymorphism
integrates seamlessly with marshmallow and other serialization frameworks
schema inherent in class definition
load any object with a generic interface
serialize objects to JSON

Example

Simple shapes example:

import objectfactory

@objectfactory.register
class Square( objectfactory.Serializable ):
    side = objectfactory.Field()

    def get_area( self ):
        return self.side * self.side

@objectfactory.register
class Triangle( objectfactory.Serializable ):
    base = objectfactory.Field()
    height = objectfactory.Field()

    def get_area( self ):
        return 0.5 * self.base * self.height

serialized_data = [
    {"_type": "Square", "side": 2.0},
    {"_type": "Triangle", "base": 1.75, "height": 2.50},
    {"_type": "Square", "side": 1.5},
]

for data in serialized_data:
    shape = objectfactory.create( data )
    print( 'class type: {}, shape area: {}'.format( type( shape ), shape.get_area() ) )

Output:

class type: <class '__main__.Square'>, shape area: 4.0
class type: <class '__main__.Triangle'>, shape area: 2.1875
class type: <class '__main__.Square'>, shape area: 2.25

More examples

See more advanced examples here

Install

Use pip for installation

pip install objectfactory

Documentation

Read the full documentation at objectfactory.readthedocs.io

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Comments

Support for nested field types
allow setting class type for serializable Nested field

allow setting class type for nested serializable List

will automatically use this class if _type is not specified in dictionary

will throw error if conflicting _type is provided

bump to 0.0.3
opened by devinaconley 2
0.1.0
Merge updates for release 0.1.0

integrate marshmallow serialization framework

support typed fields

implement nested factory field for marshmallow

allow custom marshmallow schema

expose static factory methods directly

support type enforcement and hinting in factory create method

support required fields

add from_kwargs constructor to free up __init__

create proper abstract base classes

refactor and expand test suite

setup documentation with sphinx and read the docs

update travis build for new platform

improve documentation

various bug fixes
opened by devinaconley 1
Refactor
break out tests in separate modules

break out factory and field functionality into separate modules

added product_orders.py example

added shapes.py example

updated README.md
opened by devinaconley 1
Marshmallow integration
This PR integrates marshmallow as the underlying serialization framework. This includes:

create new abstract base class (ABC) for objects and fields

dynamically define marshmallow schema from object definition

use schema de/serialization

implements enforced fields for primitive types (string, int, float, bool)

nested marshmallow field for nested objects and lists

support optional custom marshmallow schema

new and up[dated examples

refactor and expand testing
opened by devinaconley 0

Releases(0.1.0)

0.1.0(Sep 28, 2021)
This is the first stable release of objectfactory

Associated with PR #5

Changes include:

integrate marshmallow serialization framework

support typed fields

implement nested factory field for marshmallow

allow custom marshmallow schema

expose static factory methods directly

support type enforcement and hinting in factory create method

support required fields

add from_kwargs constructor to free up __init__

create proper abstract base classes

refactor and expand test suite

setup documentation with sphinx and read the docs

update travis build for new platform

improve documentation

various bug fixes

Source code(tar.gz)
Source code(zip)
0.0.3(Dec 18, 2019)
associated with PR #3

allow setting class type for serializable Nested field

allow setting class type for nested serializable List

will automatically use this class if _type is not specified in dictionary

will throw error if conflicting _type is provided

Source code(tar.gz)
Source code(zip)
0.0.2(Mar 21, 2019)
refactor codebase

examples

documentation

automated testing

Source code(tar.gz)
Source code(zip)
0.0.1(Mar 16, 2019)

initial release
Source code(tar.gz)
Source code(zip)

Owner

Devin A. Conley

GitHub Repository https://objectfactory.readthedocs.io/

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