Interface Definitions

Component and Component Architecture Interfaces

interface zope.component.interfaces.IComponentArchitecture[source]

The Component Architecture is defined by two key components: Adapters and Utiltities. Both are managed by site managers. All other components build on top of them.

getGlobalSiteManager()

Return the global site manager.

This function should never fail and always return an object that provides IGlobalSiteManager.

getSiteManager(context=None)

Get the nearest site manager in the given context.

If context is None, return the global site manager.

If the context is not None, it is expected that an adapter from the context to IComponentLookup can be found. If no adapter is found, a ComponentLookupError is raised.

getUtility(interface, name='', context=None)

Get the utility that provides interface

Returns the nearest utility to the context that implements the specified interface. If one is not found, raises ComponentLookupError.

queryUtility(interface, name='', default=None, context=None)

Look for the utility that provides interface

Returns the nearest utility to the context that implements the specified interface. If one is not found, returns default.

queryNextUtility(context, interface, name='', default=None)

Query for the next available utility.

Find the next available utility providing interface and having the specified name. If no utility was found, return the specified default value.

getNextUtility(context, interface, name='')

Get the next available utility.

If no utility was found, a ComponentLookupError is raised.

getUtilitiesFor(interface, context=None)

Return the utilities that provide an interface

An iterable of utility name-value pairs is returned.

getAllUtilitiesRegisteredFor(interface, context=None)

Return all registered utilities for an interface

This includes overridden utilities.

An iterable of utility instances is returned. No names are returned.

getAdapter(object, interface=<InterfaceClass zope.interface.Interface>, name=u'', context=None)

Get a named adapter to an interface for an object

Returns an adapter that can adapt object to interface. If a matching adapter cannot be found, raises ComponentLookupError.

If context is None, an application-defined policy is used to choose an appropriate service manager from which to get an ‘Adapters’ service.

If ‘context’ is not None, context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

getAdapterInContext(object, interface, context)

Get a special adapter to an interface for an object

NOTE: This method should only be used if a custom context needs to be provided to provide custom component lookup. Otherwise, call the interface, as in:

interface(object)

Returns an adapter that can adapt object to interface. If a matching adapter cannot be found, raises ComponentLookupError.

Context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

If the object has a __conform__ method, this method will be called with the requested interface. If the method returns a non-None value, that value will be returned. Otherwise, if the object already implements the interface, the object will be returned.

getMultiAdapter(objects, interface=<InterfaceClass zope.interface.Interface>, name='', context=None)

Look for a multi-adapter to an interface for an objects

Returns a multi-adapter that can adapt objects to interface. If a matching adapter cannot be found, raises ComponentLookupError.

If context is None, an application-defined policy is used to choose an appropriate service manager from which to get an ‘Adapters’ service.

If ‘context’ is not None, context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

The name consisting of an empty string is reserved for unnamed adapters. The unnamed adapter methods will often call the named adapter methods with an empty string for a name.

queryAdapter(object, interface=<InterfaceClass zope.interface.Interface>, name=u'', default=None, context=None)

Look for a named adapter to an interface for an object

Returns an adapter that can adapt object to interface. If a matching adapter cannot be found, returns the default.

If context is None, an application-defined policy is used to choose an appropriate service manager from which to get an ‘Adapters’ service.

If ‘context’ is not None, context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

queryAdapterInContext(object, interface, context, default=None)

Look for a special adapter to an interface for an object

NOTE: This method should only be used if a custom context needs to be provided to provide custom component lookup. Otherwise, call the interface, as in:

interface(object, default)

Returns an adapter that can adapt object to interface. If a matching adapter cannot be found, returns the default.

Context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

If the object has a __conform__ method, this method will be called with the requested interface. If the method returns a non-None value, that value will be returned. Otherwise, if the object already implements the interface, the object will be returned.

queryMultiAdapter(objects, interface=<InterfaceClass zope.interface.Interface>, name=u'', default=None, context=None)

Look for a multi-adapter to an interface for objects

Returns a multi-adapter that can adapt objects to interface. If a matching adapter cannot be found, returns the default.

If context is None, an application-defined policy is used to choose an appropriate service manager from which to get an ‘Adapters’ service.

If ‘context’ is not None, context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

The name consisting of an empty string is reserved for unnamed adapters. The unnamed adapter methods will often call the named adapter methods with an empty string for a name.

getAdapters(objects, provided, context=None)

Look for all matching adapters to a provided interface for objects

Return a list of adapters that match. If an adapter is named, only the most specific adapter of a given name is returned.

If context is None, an application-defined policy is used to choose an appropriate service manager from which to get an ‘Adapters’ service.

If ‘context’ is not None, context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

subscribers(required, provided, context=None)

Get subscribers

Subscribers are returned that provide the provided interface and that depend on and are computed from the sequence of required objects.

If context is None, an application-defined policy is used to choose an appropriate service manager from which to get an ‘Adapters’ service.

If ‘context’ is not None, context is adapted to IServiceService, and this adapter’s ‘Adapters’ service is used.

handle(*objects)

Call all of the handlers for the given objects

Handlers are subscription adapter factories that don’t produce anything. They do all of their work when called. Handlers are typically used to handle events.

adapts(*interfaces)

Declare that a class adapts the given interfaces.

This function can only be used in a class definition.

(TODO, allow classes to be passed as well as interfaces.)

createObject(factory_name, *args, **kwargs)

Create an object using a factory

Finds the named factory in the current site and calls it with the given arguments. If a matching factory cannot be found raises ComponentLookupError. Returns the created object.

A context keyword argument can be provided to cause the factory to be looked up in a location other than the current site. (Of course, this means that it is impossible to pass a keyword argument named “context” to the factory.

getFactoryInterfaces(name, context=None)

Get interfaces implemented by a factory

Finds the factory of the given name that is nearest to the context, and returns the interface or interface tuple that object instances created by the named factory will implement.

getFactoriesFor(interface, context=None)

Return a tuple (name, factory) of registered factories that create objects which implement the given interface.

interface zope.component.interfaces.IRegistry[source]

Object that supports component registry

registrations()

Return an iterable of component registrations

interface zope.component.interfaces.IComponentRegistrationConvenience[source]

API for registering components.

CAUTION: This API should only be used from test or application-setup code. This api shouldn’t be used by regular library modules, as component registration is a configuration activity.

provideUtility(component, provides=None, name=u'')

Register a utility globally

A utility is registered to provide an interface with a name. If a component provides only one interface, then the provides argument can be omitted and the provided interface will be used. (In this case, provides argument can still be provided to provide a less specific interface.)

CAUTION: This API should only be used from test or application-setup code. This API shouldn’t be used by regular library modules, as component registration is a configuration activity.

provideAdapter(factory, adapts=None, provides=None, name=u'')

Register an adapter globally

An adapter is registered to provide an interface with a name for some number of object types. If a factory implements only one interface, then the provides argument can be omitted and the provided interface will be used. (In this case, a provides argument can still be provided to provide a less specific interface.)

If the factory has an adapts declaration, then the adapts argument can be omitted and the declaration will be used. (An adapts argument can be provided to override the declaration.)

CAUTION: This API should only be used from test or application-setup code. This API shouldn’t be used by regular library modules, as component registration is a configuration activity.

provideSubscriptionAdapter(factory, adapts=None, provides=None)

Register a subscription adapter

A subscription adapter is registered to provide an interface for some number of object types. If a factory implements only one interface, then the provides argument can be omitted and the provided interface will be used. (In this case, a provides argument can still be provided to provide a less specific interface.)

If the factory has an adapts declaration, then the adapts argument can be omitted and the declaration will be used. (An adapts argument can be provided to override the declaration.)

CAUTION: This API should only be used from test or application-setup code. This API shouldn’t be used by regular library modules, as component registration is a configuration activity.

provideHandler(handler, adapts=None)

Register a handler

Handlers are subscription adapter factories that don’t produce anything. They do all of their work when called. Handlers are typically used to handle events.

If the handler has an adapts declaration, then the adapts argument can be omitted and the declaration will be used. (An adapts argument can be provided to override the declaration.)

CAUTION: This API should only be used from test or application-setup code. This API shouldn’t be used by regular library modules, as component registration is a configuration activity.

interface zope.component.interfaces.IPossibleSite[source]

An object that could be a site.

setSiteManager(sitemanager)

Sets the site manager for this object.

getSiteManager()

Returns the site manager contained in this object.

If there isn’t a site manager, raise a component lookup.

interface zope.component.interfaces.ISite[source]

Extends: zope.component.interfaces.IPossibleSite

Marker interface to indicate that we have a site

exception zope.component.interfaces.Misused[source]

A component is being used (registered) for the wrong interface.

interface zope.component.interfaces.IFactory[source]

A factory is responsible for creating other components.

title

The factory title.

description

A brief description of the factory.

__call__(*args, **kw)

Return an instance of the objects we’re a factory for.

getInterfaces()

Get the interfaces implemented by the factory

Return the interface(s), as an instance of Implements, that objects created by this factory will implement. If the callable’s Implements instance cannot be created, an empty Implements instance is returned.