net.shibboleth.metadata

Class DeduplicatingItemIdMergeStrategy

java.lang.Object

net.shibboleth.metadata.DeduplicatingItemIdMergeStrategy

All Implemented Interfaces:

CollectionMergeStrategy

public class DeduplicatingItemIdMergeStrategy
extends Object
implements CollectionMergeStrategy

A merge strategy that adds source items to the target collection if none of the Items in the target collection have the same ItemId as source item. If the source item does not contain a ItemId it is always added to the target collection.

Constructor Summary

Constructors

Constructor and Description
DeduplicatingItemIdMergeStrategy()

Method Summary

Methods

Modifier and Type	Method and Description
private <T> void	merge(HashSet<ItemId> presentItemIds, Collection<Item<T>> target, Collection<Item<T>> sourceItems) Adds source items to the target collection if none of the Items in the target collection have the same ItemId as source item.
<T> void	mergeCollection(Collection<Item<T>> target, List<Collection<Item<T>>> sources) Merges the results of each child pipeline in to the collection of Item given to this stage.

Methods inherited from class java.lang.Object

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

Constructor Detail

DeduplicatingItemIdMergeStrategy

public DeduplicatingItemIdMergeStrategy()

Method Detail

mergeCollection

public <T> void mergeCollection(@Nonnull@NonnullElements
                       Collection<Item<T>> target,
                       @Nonnull@NonnullElements
                       List<Collection<Item<T>>> sources)

Merges the results of each child pipeline in to the collection of Item given to this stage.

Specified by:

mergeCollection in interface CollectionMergeStrategy

Type Parameters:

T - type of data contained in the items

Parameters:

target - collection in to which all the Items should be merged, never null

sources - collections of Items to be merged in to the target, never null not containing any null elements

merge

private <T> void merge(@Nonnull@NonnullElements
             HashSet<ItemId> presentItemIds,
             @Nonnull@NonnullElements
             Collection<Item<T>> target,
             @Nonnull@NonnullElements
             Collection<Item<T>> sourceItems)

Adds source items to the target collection if none of the Items in the target collection have the same ItemId as source item. If the source item does not contain a ItemId it is always added to the target collection.

Type Parameters:

T - type of data contained in the items

Parameters:

presentItemIds - IDs that are already present in the target collection

target - the collection to which items will be merged in to

sourceItems - the collection of items to be merged in to the target