T
- The expected type produced by the factory.ID
- The type of the ID being used.CTX
- The context which may influence the object being created by this
factory.@FunctionalInterface public interface ContextLookupFactory<T,ID,CTX>
ContextLookupFactory
defines the functionality which must be
provided in order to represent a factory for object creation of objects
identified by an ID String
and of a predefined type specified with a
generic argument (in contrast to the BeanLookupFactory
, which creates
instances of an expected type). Many alternative implementations of a
ContextLookupFactory
may may exist which construct the instances
their way.
Having factories that generic as we define it here, we are able to decouple
our business logic from any specific framework: Your business logic must not
know anything about how the instances are generated. It mainly just needs to
know how to use the ContextLookupFactory
. It is up to the application
"end point", i.e. a command line tool with a main-method or a web-application
to finally decide which factory to use.
Depending on the implementation used or configuration provided, the
ContextLookupFactory
may return singletons or dedicated separate
instances when queried for instances.
Modifier and Type | Method | Description |
---|---|---|
T |
createInstance(ID aIdentifier,
CTX aContext) |
This method creates / retrieves an instance of the configured type
identified with the given identifier (name).
|
default T |
createInstance(ID aIdentifier,
CTX aContext,
Map<String,String> aProperties) |
This method creates / retrieves an instance of the configured type
identified with the given identifier (name).
|
T createInstance(ID aIdentifier, CTX aContext)
aIdentifier
- The name identifying the instance to be created /
retrieved.aContext
- The context which may influence the object being created
by this factory.default T createInstance(ID aIdentifier, CTX aContext, Map<String,String> aProperties)
aIdentifier
- The name identifying the instance to be created /
retrieved.aContext
- The context which may influence the object being created
by this factory.aProperties
- The dynamic properties which are used to configure the
desired bean.ClassCastException
- in case the fabricated type is not type
compatible with the required type T.Copyright © 2018. All rights reserved.