LegacyModeDuplicatesDetector (dropwizard-guicey 5.4.0 API)

java.lang.Object
- ru.vyarus.dropwizard.guice.module.context.unique.LegacyModeDuplicatesDetector

All Implemented Interfaces:

DuplicateConfigDetector
```
public class LegacyModeDuplicatesDetector
extends java.lang.Object
implements DuplicateConfigDetector
```
Duplicates detector, implementing legacy guicey behaviour: only one instance of class is allowed. It could be used during migrations from previous guicey versions (when new behaviour is not profitable because too much of current logic assumes duplicates eviction).
See also GuiceBundle.Builder.uniqueItems(Class[]) if only few types actually require deduplication (less restrictive option).

Since:

03.07.2019

Constructor Summary

Constructors
Constructor Description

LegacyModeDuplicatesDetector()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`getDuplicateItem(java.util.List<java.lang.Object> registered, java.lang.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 Detail
  - LegacyModeDuplicatesDetector
```
public LegacyModeDuplicatesDetector()
```
- Method Detail
  - getDuplicateItem
```
public java.lang.Object getDuplicateItem(java.util.List<java.lang.Object> registered,
                                         java.lang.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)