public abstract class AbstractExternalizer<T> extends Object implements AdvancedExternalizer<T>
AdvancedExternalizer implementations that offers default
implementations for some of its methods. In particular, this base class
offers a default implementation for AdvancedExternalizer.getId()
that returns null which is particularly useful for advanced externalizers
whose id will be provided by XML or programmatic configuration rather than
the externalizer implementation itself.| Constructor and Description |
|---|
AbstractExternalizer() |
| Modifier and Type | Method and Description |
|---|---|
Integer |
getId()
Returns an integer that identifies the externalizer type.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetTypeClassesreadObject, writeObjectpublic Integer getId()
AdvancedExternalizerAdvancedExternalizer should read
the contents of the incoming buffer.
Using a positive integer allows for very efficient variable length
encoding of numbers, and it's much more efficient than shipping
AdvancedExternalizer implementation class information around.
Negative values are not allowed.
Implementers of this interface can use any positive integer as long as
it does not clash with any other identifier in the system. You can find
information on the pre-assigned identifier ranges in
here.
It's highly recommended that maintaining of these identifiers is done
in a centralized way and you can do so by making annotations reference
a set of statically defined identifiers in a separate class or
interface. Such class/interface gives a global view of the identifiers
in use and so can make it easier to assign new ids.
Implementors can optionally avoid giving a meaningful implementation to
this method (i.e. return null) and instead rely on XML or programmatic
configuration to provide the AdvancedExternalizer id. If no id can be
determined via the implementation or XML/programmatic configuration, an
error will be reported. If an id has been defined both via the
implementation and XML/programmatic configuration, the value defined via
XML/programmatic configuration will be used ignoring the other.getId in interface AdvancedExternalizer<T>Copyright © 2014 JBoss, a division of Red Hat. All Rights Reserved.