T
- The expected type produced by the factory.ID
- The type of the ID being used.@FunctionalInterface public interface LookupFactory<T,ID>
LookupFactory
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 LookupFactory
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 LookupFactory
. 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
LookupFactory
may return singletons or dedicated separate instances
when queried for instances.
Modifier and Type | Method | Description |
---|---|---|
T |
createInstance(ID aIdentifier) |
This method creates / retrieves an instance of the configured type
identified with the given identifier (name).
|
default T |
createInstance(ID aIdentifier,
Map<String,String> aProperties) |
This method creates / retrieves an instance of the configured type
identified with the given identifier (name).
|
T createInstance(ID aIdentifier)
aIdentifier
- The name identifying the instance to be created /
retrieved.default T createInstance(ID aIdentifier, Map<String,String> aProperties)
aIdentifier
- The name identifying the instance to be created /
retrieved.aProperties
- The dynamic properties which are used to configure the
desired bean.Copyright © 2018. All rights reserved.