org.glassfish.hk2.utilities

Class DuplicatePostProcessor

java.lang.Object

org.glassfish.hk2.utilities.DuplicatePostProcessor

All Implemented Interfaces:

PopulatorPostProcessor

@PerLookup
public class DuplicatePostProcessor
extends Object
implements PopulatorPostProcessor

This post-processor removes duplicate descriptors from the set of descriptors being added to the service registry.

It is often the case when using a classpath that the same jar file can appear on the path more than once. For example this is often done when patching. However, if this jar contains HK2 descriptor files in it, that can mean duplicate services that are not intended to be duplicated. This service removes all duplicate descriptors from the set to be added to HK2

Author:

jwells

Constructor Summary

Constructors

Constructor and Description
DuplicatePostProcessor()

Method Summary

Methods

Modifier and Type	Method and Description
DescriptorImpl	process(ServiceLocator serviceLocator, DescriptorImpl descriptorImpl) This method can be used to alter the descriptor read in.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DuplicatePostProcessor

public DuplicatePostProcessor()

Method Detail

process

public DescriptorImpl process(ServiceLocator serviceLocator,
                     DescriptorImpl descriptorImpl)

Description copied from interface: PopulatorPostProcessor

This method can be used to alter the descriptor read in. It can also add descriptors, or remove the descriptor (by returning null). Any alterations made to the descriptor passed in will remain in effect.

Specified by:

process in interface PopulatorPostProcessor

Parameters:

serviceLocator - the ServiceLocator being populated. Will not be null

descriptorImpl - The descriptorImpl read from some external source. This processor can modify this descriptor fully

Returns:

The descriptor to be added to the system. If this returns null then the descriptorImpl passed in will NOT be added to the system. Implementations may return the descriptor passed in, but do not have to. The descriptor added to the system will be the one returned from this method