Package ru.vyarus.dropwizard.guice.module.context.unique

Class UniqueItemsDuplicatesDetector

java.lang.Object

ru.vyarus.dropwizard.guice.module.context.unique.UniqueItemsDuplicatesDetector

All Implemented Interfaces:

DuplicateConfigDetector

public class UniqueItemsDuplicatesDetector
extends Object
implements DuplicateConfigDetector

Simple deduplicator implementation to track uniqueness for exact items (not everything like LegacyModeDuplicatesDetector do).

Since:

24.09.2019

Constructor Summary

Constructors

Constructor	Description
UniqueItemsDuplicatesDetector(Class<?>... uniqueItems)	Create detector.

Method Summary

Modifier and Type	Method	Description
Object	getDuplicateItem(List<Object> registered, Object newItem)	Called every time when configured object (guicey bundle or guice module) of the same type is already registered.

Methods inherited from class java.lang.Object

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

Constructor Details

UniqueItemsDuplicatesDetector

public UniqueItemsDuplicatesDetector(Class<?>... uniqueItems)

Create detector.

Parameters:

uniqueItems - unique items

Method Details

getDuplicateItem

public Object getDuplicateItem(List<Object> registered,
 Object newItem)

Description copied from interface: DuplicateConfigDetector

Called every time when configured object (guicey bundle or guice module) of the same type is already registered. Note that method is called only if new instance is not equal to any registered instances of the same type. Method must return duplicate object from already registered instances (or null to allow new registration).

For example, if 3 or more instances of the same type are registered then method would be called for each new configured instance (in case of 3 registrations - 2 method calls, assuming that instances are not equal).

Provided instances will always be of the same class (no polymorphic checks). Classes loaded from different class loaders will be recognized as same class (and so provided instances may be instances of the same class but from different class loaders).

Specified by:

getDuplicateItem in interface DuplicateConfigDetector

Parameters:

registered - already registered items

newItem - new item to check

Returns:

duplicate object from already registered (to mark this one as duplicate to already registered)