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import inspect |
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class Service(object): |
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""" |
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A service represents a class that the dependency injector can instantiate when asked. |
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After the service has been declared, its arguments might be specified |
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using the methods add_argument or add_arguments. |
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The argument value can be: |
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* A raw value that will be injected as it is when instantiating the service |
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* A reference to another service. This reference service will be instantiated |
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before being injected during the service instantiation |
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""" |
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def __init__(self, subject): |
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self._subject = subject |
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self._arguments = dict() |
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self._is_singleton = False |
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self._type = "instance" |
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if inspect.isclass(subject) is True: |
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self._type = "class" |
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@property |
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def type(self): |
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return self._type |
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@property |
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def is_singleton(self): |
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""" |
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Get whether this service is a Singleton or not |
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""" |
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return self._is_singleton |
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@is_singleton.setter |
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def is_singleton(self, value): |
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""" |
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Set whether this service is a Singleton or not |
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""" |
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self._is_singleton = value |
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@property |
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def subject(self): |
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""" |
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Subject of this service |
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The subject might be a class that will be instantiated |
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or an instance that just will be returned |
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""" |
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return self._subject |
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@property |
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def arguments(self): |
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""" |
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Arguments of this service |
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:rtype: dict |
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""" |
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return self._arguments |
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def add_argument(self, name, value): |
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""" |
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Add an argument to this service |
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The argument value can be a reference to another service. |
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In this case the reference service will be instantiated |
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before being injected in this service |
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:param name: Name of the argument to add |
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:param value: Value to assign to the argument |
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:type name: string |
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:type value: mixed |
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:return: The service |
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:rtype: Service |
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""" |
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self._arguments[name] = value |
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return self |
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def add_arguments(self, **kwargs): |
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""" |
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Add several arguments to this service. |
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""" |
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self._arguments.update(kwargs) |
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return self |
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Darkheir /
pyjection
