com.atlassian.confluence.api.impl.service.relation

Class RelationServiceImpl

java.lang.Object

com.atlassian.confluence.api.impl.service.relation.RelationServiceImpl

All Implemented Interfaces:

RelationService

public class RelationServiceImpl
extends Object
implements RelationService

Since:

5.9

Nested Class Summary

Nested classes/interfaces inherited from interface com.atlassian.confluence.api.service.relations.RelationService

RelationService.RelatableFinder<R extends Relatable>, RelationService.Validator

Constructor Summary

Constructors

Constructor and Description
RelationServiceImpl(RelationManager relationManager, RelationInstanceFactory relationInstanceFactory, RelatableFactory relatableFactory, RelatableResolver relatableResolver, PaginationService paginationService, FavouriteManager favouriteManager, PermissionManager permissionManager)

Method Summary

Modifier and Type	Method and Description
<S extends Relatable,T extends Relatable> RelationInstance<S,T>	create(RelationInstance<S,T> relationInstance) Creates a directed relation between two relatable entities.
<S extends Relatable,T extends Relatable> void	delete(RelationInstance<S,T> relationInstance) Remove a relation if it exists between a source and a target relatable entity
<S extends Relatable,T extends Relatable> RelationService.RelatableFinder<S>	findSources(T target, RelationDescriptor<S,T> relationDescriptor) Create a finder to find sources of a relation.
<S extends Relatable,T extends Relatable> RelationService.RelatableFinder<T>	findTargets(S source, RelationDescriptor<S,T> relationDescriptor) Create a finder to find targets of a relation.
<S extends Relatable,T extends Relatable> boolean	isRelated(S source, RelationDescriptor<S,T> relationDescriptor, T target) Determine whether a given source and target are related by the given relation
RelationService.Validator	validator()

Methods inherited from class java.lang.Object

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

Constructor Detail

RelationServiceImpl

public RelationServiceImpl(RelationManager relationManager,
                           RelationInstanceFactory relationInstanceFactory,
                           RelatableFactory relatableFactory,
                           RelatableResolver relatableResolver,
                           PaginationService paginationService,
                           FavouriteManager favouriteManager,
                           PermissionManager permissionManager)

Method Detail

create

public <S extends Relatable,T extends Relatable> RelationInstance<S,T> create(RelationInstance<S,T> relationInstance)
                                                                       throws ServiceException

Description copied from interface: RelationService

Creates a directed relation between two relatable entities.

For example, when a user favourites a space a SpaceFavouriteRelation is created from the user to the space:

      relationService.create(RelationInstance.builder(user, new SpaceFavouriteRelation(), space).build));
 

Specified by:

create in interface RelationService

Type Parameters:

S - type of the source entity

T - type of the target entity

Parameters:

relationInstance - the relation to create

Returns:

the newly created relationInstance

Throws:

ServiceException - if validation fails

delete

public <S extends Relatable,T extends Relatable> void delete(RelationInstance<S,T> relationInstance)
                                                      throws ServiceException

Description copied from interface: RelationService

Remove a relation if it exists between a source and a target relatable entity

Specified by:

delete in interface RelationService

Type Parameters:

S - type of the source entity

T - type of the target entity

Parameters:

relationInstance - relation to be deleted

Throws:

ServiceException - if validation fails

validator

public RelationService.Validator validator()

Specified by:

validator in interface RelationService

Returns:

a new validator to validate create and delete operations that can be performed using the RelationService

findTargets

public <S extends Relatable,T extends Relatable> RelationService.RelatableFinder<T> findTargets(S source,
                                                                                                RelationDescriptor<S,T> relationDescriptor)

Description copied from interface: RelationService

Create a finder to find targets of a relation. This method is used to find all targets for given relation and given source. For example, it can be used in operations like "findAllFavouriteContentForGivenUser" (user2content relation) or "findAllUsersThisUserIsFollowingTo" (user2user relation)

For example, to find spaces that a user has favourites :

      relationService.findTargets(user, new SpaceFavouriteRelation()).fetchMany(new SimplePageRequest(0,
 10));
 

Specified by:

findTargets in interface RelationService

Type Parameters:

S - the type of the source entity

T - the type of the target entity

Parameters:

source - the source entity (LHS) of the relation

relationDescriptor - the type of relation to find

Returns:

a finder to find targets of a relation.

findSources

public <S extends Relatable,T extends Relatable> RelationService.RelatableFinder<S> findSources(T target,
                                                                                                RelationDescriptor<S,T> relationDescriptor)

Description copied from interface: RelationService

Create a finder to find sources of a relation.

This method is used to find all sources for given relation and given source. For example, it can be used in operations like "findAllUsersWhoFavouritedThisPage" (user2content relation) or "findAllFollowers" (user2user relation)

For example, to find users that favourite a particular space :

      relationService.findSources(space, new SpaceFavouriteRelation()).fetchMany(new SimplePageRequest(0,
 10));
 

Specified by:

findSources in interface RelationService

Type Parameters:

S - the type of the source entity

T - the type of the target entity

Parameters:

target - the target entity (RHS) of the relation

relationDescriptor - the type of relation to find

Returns:

a finder to find targets of a relation.

isRelated

public <S extends Relatable,T extends Relatable> boolean isRelated(S source,
                                                                   RelationDescriptor<S,T> relationDescriptor,
                                                                   T target)

Description copied from interface: RelationService

Determine whether a given source and target are related by the given relation

Specified by:

isRelated in interface RelationService

Type Parameters:

S - type of the source entity

T - type of the target entity

Returns:

true if the relation exists between the given source and target