org.kuali.student.r2.common.helper
Class EntityMergeHelper<E,INFO>

java.lang.Object
  org.kuali.student.r2.common.helper.EntityMergeHelper<E,INFO>

Type Parameters:

E - The entity being merged into.

INFO - the dto providing the data to be merged.

public final class EntityMergeHelper<E,INFO>
extends Object

Helps perform merge operations that take place when an entity is loaded from the database and then updated from the dto content being provided through the service.

Author:

ocleirig

Nested Class Summary

static interface	EntityMergeHelper.EntityMergeOptions<E,INFO> Options when merging the entity from the dto.
static class	EntityMergeHelper.EntityMergeResult<E> The results of a merge are the merged list and the list of orphaned data.
static interface	EntityMergeHelper.StringMergeOptions<E> Options for merging a list of strings into a list of entities.

Constructor Summary

EntityMergeHelper()

Method Summary

EntityMergeHelper.EntityMergeResult<E>	merge(List<E> entityList, List<INFO> infoList, EntityMergeHelper.EntityMergeOptions<E,INFO> options) Performs a Merge of the current entity list from the info list and options provided.
EntityMergeHelper.EntityMergeResult<E>	mergeStringList(List<E> entityList, List<String> stringList, EntityMergeHelper.StringMergeOptions<E> options) Merges a simple string list against a persisted list.

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityMergeHelper

public EntityMergeHelper()

Method Detail

mergeStringList

public EntityMergeHelper.EntityMergeResult<E> mergeStringList(List<E> entityList,
                                                              List<String> stringList,
                                                              EntityMergeHelper.StringMergeOptions<E> options)

Merges a simple string list against a persisted list. We assume that if the string value does not exist then we can delete the item.

Parameters:

entityList - the list of entities

stringList - the list of values

Returns:

the merge results.

merge

public EntityMergeHelper.EntityMergeResult<E> merge(List<E> entityList,
                                                    List<INFO> infoList,
                                                    EntityMergeHelper.EntityMergeOptions<E,INFO> options)

Performs a Merge of the current entity list from the info list and options provided. The results are the list of merged entities and a list of orphaned objects that can be deleted from the database.

Parameters:

entityList - the target list of entities

infoList - the source list of dto info objects.

options - the logic for extracting the keys and creating/merging the entities.

Returns:

the results of the merge.