simple.http.load
Class MapperFactory
java.lang.Object
simple.http.load.MapperFactory
public final class MapperFactory
- extends java.lang.Object
The MapperFactory
retrieves the Mapper
implementation for the system. This is used so that a mapping
scheme can be imposed on the system using the command line. This
has a number of advantages. For one it enables a mapping to be
used without any changes to code, the Mapper
object
only needs to be implemented and specified at the command line.
In order to define a system wide implementation a property is
needed to define the object. This uses the System
properties to define the class name for the default instance.
The property is the simple.http.load.mapper
property that can be set using an argument to the VM.
java -Dsimple.http.load.mapper=demo.example.ExampleMapper
This will set the System
property to the class
name demo.example.ExampleMapper
. When the factory
method getInstance
is invoked it will return an
implementation of this object or if the implementation cannot
be loaded by this classes class loader a default implementation
DefaultMapper
is returned instead.
- Author:
- Niall Gallagher
Method Summary |
static Mapper |
getInstance(Context context)
This is used to produce the system wide Mapper
implementation so that the MapperEngine objects
can remain consistant. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MapperFactory
public MapperFactory()
getInstance
public static Mapper getInstance(Context context)
- This is used to produce the system wide
Mapper
implementation so that the MapperEngine
objects
can remain consistant. This will use a system property
simple.http.load.mapper
to define the
class name of the implementation that will be used for the
system wide Mapper
. The property should contain
the fully qualified class name of the object and should be
loadable by this classes class loader. If the specified class
cannot be loaded the DefaultMapper
is used.
- Parameters:
context
- this is context used by the implementation
- Returns:
- the systems
Mapper
implementation