Package org.dspace.eperson

Class GroupServiceImpl

java.lang.Object

org.dspace.content.DSpaceObjectServiceImpl<Group>

org.dspace.eperson.GroupServiceImpl

All Implemented Interfaces:

DSpaceObjectLegacySupportService<Group>, DSpaceObjectService<Group>, GroupService

public class GroupServiceImpl
extends DSpaceObjectServiceImpl<Group>
implements GroupService

Service implementation for the Group object. This class is responsible for all business logic calls for the Group object and is autowired by spring. This class should never be accessed directly.

Author:

kevinvandevelde at atmire.com

Field Summary

Fields

Modifier and Type	Field	Description
protected AuthorizeService	authorizeService
protected ClaimedTaskService	claimedTaskService
protected CollectionRoleService	collectionRoleService
protected CollectionService	collectionService
protected CommunityService	communityService
protected EPersonService	ePersonService
protected Group2GroupCacheDAO	group2GroupCacheDAO
protected GroupDAO	groupDAO
protected PoolTaskService	poolTaskService
protected ResourcePolicyService	resourcePolicyService
protected XmlWorkflowFactory	workflowFactory

Fields inherited from class org.dspace.content.DSpaceObjectServiceImpl

choiceAuthorityService, handleService, metadataAuthorityService, metadataFieldService, metadataValueService, relationshipService

Fields inherited from interface org.dspace.content.service.DSpaceObjectService

MD_COPYRIGHT_TEXT, MD_INTRODUCTORY_TEXT, MD_LICENSE, MD_NAME, MD_PROVENANCE_DESCRIPTION, MD_SHORT_DESCRIPTION, MD_SIDEBAR_TEXT, MD_SOURCE, MD_USER_FORMAT_DESCRIPTION

Fields inherited from interface org.dspace.eperson.service.GroupService

NAME

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	GroupServiceImpl()

Method Summary

Modifier and Type	Method	Description
void	addMember(Context context, Group group, EPerson e)	add an eperson member
void	addMember(Context context, Group groupParent, Group groupChild)	add group to this group.
List<Group>	allMemberGroups(Context context, EPerson ePerson)	Get all of the groups that an eperson is a member of.
Set<Group>	allMemberGroupsSet(Context context, EPerson ePerson)
List<EPerson>	allMembers(Context c, Group g)	Get all of the EPerson objects who are a member of the specified group, or a member of a subgroup of the specified group, etc.
int	countAllMembers(Context context, Group group)	Count all of the EPerson objects who are a member of the specified group, or a member of a subgroup of the specified group, etc.
int	countByParent(Context context, Group parent)	Return number of groups which are a member of the given Parent group.
int	countTotal(Context context)	Count the total number of groups in DSpace
Group	create(Context context)	Create a new group
void	delete(Context context, Group group)
Group	find(Context context, UUID id)	Generic find for when the precise type of an Entity is not known
List<Group>	findAll(Context context, int sortField)	Deprecated.
List<Group>	findAll(Context context, List<MetadataField> metadataSortFields)
List<Group>	findAll(Context context, List<MetadataField> metadataSortFields, int pageSize, int offset)	Finds all groups in the site
Group	findByIdOrLegacyId(Context context, String id)
Group	findByLegacyId(Context context, int id)	Generic find for when the precise type of a DSO is not known, just the a pair of type number and database ID.
List<Group>	findByMetadataField(Context context, String searchValue, MetadataField metadataField)	Look up groups based on their value for a certain metadata field (NOTE: name is not stored as metadata)
Group	findByName(Context context, String name)	Find the group by its name - assumes name is unique
List<Group>	findByParent(Context context, Group parent, int pageSize, int offset)	Find all groups which are a member of the given Parent group
protected Set<UUID>	getChildren(Map<UUID,Set<UUID>> parents, UUID parent)	Used recursively to generate a map of ALL of the children of the given parent
List<Group>	getEmptyGroups(Context context)	Get a list of groups with no members.
String	getName(Group dso)	Get a proper name for the object.
DSpaceObject	getParentObject(Context context, Group group)	Return the dspace object that "own" the current object in the hierarchy.
int	getSupportsTypeConstant()	Returns the Constants which this service supports
void	initDefaultGroupNames(Context context)	Initializes the group names for anonymous and administrator, and marks them "permanent".
boolean	isDirectMember(Group group, EPerson ePerson)	check to see if an eperson is a direct member.
boolean	isEmpty(Group group)	Return true if group has no direct or indirect members
protected boolean	isEPersonInGroup(Context context, Group group, EPerson ePerson)
boolean	isMember(Context context, String groupName)	fast check to see if an eperson is a member called with eperson id.
boolean	isMember(Context context, EPerson eperson, String groupName)	fast check to see if an eperson is a member called with eperson id.
boolean	isMember(Context context, EPerson ePerson, Group group)	fast check to see if an eperson is a member called with eperson id.
boolean	isMember(Context context, Group group)	fast check to see if an eperson is a member called with eperson id.
boolean	isMember(Group owningGroup, Group childGroup)	Check to see if childGroup is a direct group member of owningGroup.
boolean	isParentOf(Context context, Group parentGroup, Group childGroup)	Check to see if parentGroup is a direct or in-direct parent of a childGroup.
void	removeMember(Context context, Group group, EPerson ePerson)	Removes a member of a group.
void	removeMember(Context context, Group groupParent, Group childGroup)	remove group from this group.
protected void	rethinkGroupCache(Context context, boolean flushQueries)	Regenerate the group cache AKA the group2groupcache table in the database - meant to be called when a group is added or removed from another group
List<Group>	search(Context context, String query)	Find the Groups that match the query across both Group name and Group ID.
List<Group>	search(Context context, String query, int offset, int limit)	Find the Groups that match the query across both Group name and Group ID.
List<Group>	searchNonMembers(Context context, String query, Group excludeParentGroup, int offset, int limit)	Find the groups that match the search query which are NOT currently members (subgroups) of the given parentGroup
int	searchNonMembersCount(Context context, String query, Group excludeParentGroup)	Returns the total number of groups that match the search query which are NOT currently members (subgroups) of the given parentGroup.
int	searchResultCount(Context context, String query)	Returns the total number of Groups returned by a specific query.
void	setName(Group group, String name)	set name of group
void	update(Context context, Group group)	Update the group - writing out group object and EPerson list if necessary
void	updateLastModified(Context context, Group dso)

Methods inherited from class org.dspace.content.DSpaceObjectServiceImpl

addAndShiftRightMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, clearMetadata, getAdminObject, getAuthoritiesAndConfidences, getElements, getElementsFilled, getIdentifiers, getMDValueByField, getMDValueByLegacyField, getMetadata, getMetadata, getMetadata, getMetadata, getMetadataByMetadataString, getMetadataFirstValue, getMetadataFirstValue, getMetadataValuePlace, getTypeText, match, moveMetadata, moveSingleMetadataValue, removeMetadataValues, replaceMetadata, setMetadataModified, setMetadataSingleValue, setMetadataSingleValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.dspace.content.service.DSpaceObjectService

addAndShiftRightMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, addMetadata, clearMetadata, getAdminObject, getIdentifiers, getMetadata, getMetadata, getMetadata, getMetadata, getMetadataByMetadataString, getMetadataFirstValue, getMetadataFirstValue, getTypeText, moveMetadata, removeMetadataValues, replaceMetadata, setMetadataModified, setMetadataSingleValue, setMetadataSingleValue

Field Detail

groupDAO

@Autowired(required=true)
protected GroupDAO groupDAO

group2GroupCacheDAO

@Autowired(required=true)
protected Group2GroupCacheDAO group2GroupCacheDAO

collectionService

@Autowired(required=true)
protected CollectionService collectionService

collectionRoleService

@Autowired(required=true)
protected CollectionRoleService collectionRoleService

ePersonService

@Autowired(required=true)
protected EPersonService ePersonService

communityService

@Autowired(required=true)
protected CommunityService communityService

authorizeService

@Autowired(required=true)
protected AuthorizeService authorizeService

resourcePolicyService

@Autowired(required=true)
protected ResourcePolicyService resourcePolicyService

poolTaskService

@Autowired(required=true)
protected PoolTaskService poolTaskService

claimedTaskService

@Autowired(required=true)
protected ClaimedTaskService claimedTaskService

workflowFactory

@Autowired(required=true)
protected XmlWorkflowFactory workflowFactory

Constructor Detail

GroupServiceImpl

protected GroupServiceImpl()

Method Detail

create

public Group create(Context context)
             throws SQLException,
                    AuthorizeException

Description copied from interface: GroupService

Create a new group

Specified by:

create in interface GroupService

Parameters:

context - DSpace context object

Returns:

group

Throws:

SQLException - if database error

AuthorizeException - if authorization error

setName

public void setName(Group group,
                    String name)
             throws SQLException

Description copied from interface: GroupService

set name of group

Specified by:

setName in interface GroupService

Parameters:

group - DSpace group

name - new group name

Throws:

SQLException - if database error

addMember

public void addMember(Context context,
                      Group group,
                      EPerson e)

Description copied from interface: GroupService

add an eperson member

Specified by:

addMember in interface GroupService

Parameters:

context - DSpace context object

group - DSpace group

e - eperson

addMember

public void addMember(Context context,
                      Group groupParent,
                      Group groupChild)
               throws SQLException

Description copied from interface: GroupService

add group to this group. Be sure to call the #update(Context, Group) method once that all the membership are set to trigger the rebuild of the group2group cache table

Specified by:

addMember in interface GroupService

Parameters:

context - DSpace context object

groupParent - parent group

groupChild - child group

Throws:

SQLException - if database error

removeMember

public void removeMember(Context context,
                         Group group,
                         EPerson ePerson)
                  throws SQLException

Removes a member of a group. The removal will be refused if the group is linked to a workflow step which has claimed tasks or pool tasks and no other member is present in the group to handle these.

Specified by:

removeMember in interface GroupService

Parameters:

context - DSpace context object

group - DSpace group

ePerson - eperson

Throws:

SQLException

removeMember

public void removeMember(Context context,
                         Group groupParent,
                         Group childGroup)
                  throws SQLException

Description copied from interface: GroupService

remove group from this group. Be sure to call the #update(Context, Group) method once that all the membership are set to trigger the rebuild of the group2group cache table

Specified by:

removeMember in interface GroupService

Parameters:

context - DSpace context object

groupParent - parent group

childGroup - child group

Throws:

SQLException - if database error

isDirectMember

public boolean isDirectMember(Group group,
                              EPerson ePerson)

Description copied from interface: GroupService

check to see if an eperson is a direct member. If the eperson is a member via a subgroup will be returned false

Specified by:

isDirectMember in interface GroupService

Parameters:

group - DSpace group

ePerson - eperson to check membership

Returns:

true or false

isMember

public boolean isMember(Group owningGroup,
                        Group childGroup)

Description copied from interface: GroupService

Check to see if childGroup is a direct group member of owningGroup. If childGroup is a subgroup via another group will be returned false

Specified by:

isMember in interface GroupService

Parameters:

owningGroup - parent group

childGroup - child group

Returns:

true or false

isParentOf

public boolean isParentOf(Context context,
                          Group parentGroup,
                          Group childGroup)
                   throws SQLException

Description copied from interface: GroupService

Check to see if parentGroup is a direct or in-direct parent of a childGroup.

Specified by:

isParentOf in interface GroupService

Parameters:

context - current DSpace session.

parentGroup - parent group

childGroup - child group

Returns:

true or false

Throws:

SQLException

isMember

public boolean isMember(Context context,
                        Group group)
                 throws SQLException

Description copied from interface: GroupService

fast check to see if an eperson is a member called with eperson id. Does database lookup without instantiating all of the eperson objects and is thus a static method

Specified by:

isMember in interface GroupService

Parameters:

context - context

group - group to check

Returns:

true or false

Throws:

SQLException - if database error

isMember

public boolean isMember(Context context,
                        EPerson ePerson,
                        Group group)
                 throws SQLException

Description copied from interface: GroupService

fast check to see if an eperson is a member called with eperson id. Does database lookup without instantiating all of the eperson objects and is thus a static method.

Specified by:

isMember in interface GroupService

Parameters:

context - DSpace context object.

ePerson - EPerson whose membership should be checked.

group - The group to check against.

Returns:

true or false

Throws:

SQLException - if database error

isMember

public boolean isMember(Context context,
                        String groupName)
                 throws SQLException

Description copied from interface: GroupService

fast check to see if an eperson is a member called with eperson id. Does database lookup without instantiating all of the eperson objects and is thus a static method. This method uses context.getCurrentUser() as eperson whose membership should be checked.

Specified by:

isMember in interface GroupService

Parameters:

context - context

groupName - the name of the group to check

Returns:

true or false

Throws:

SQLException - if database error

isMember

public boolean isMember(Context context,
                        EPerson eperson,
                        String groupName)
                 throws SQLException

Description copied from interface: GroupService

fast check to see if an eperson is a member called with eperson id. Does database lookup without instantiating all of the eperson objects and is thus a static method. The eperson whose membership should be checked must be defined as method attribute.

Specified by:

isMember in interface GroupService

Parameters:

context - context

eperson - is this EPerson a member of the group?

groupName - the name of the group to check

Returns:

true or false

Throws:

SQLException - if database error

allMemberGroups

public List<Group> allMemberGroups(Context context,
                                   EPerson ePerson)
                            throws SQLException

Description copied from interface: GroupService

Get all of the groups that an eperson is a member of.

Specified by:

allMemberGroups in interface GroupService

Parameters:

context - DSpace context

ePerson - ePerson object

Returns:

list of Group objects

Throws:

SQLException - if database error

allMemberGroupsSet

public Set<Group> allMemberGroupsSet(Context context,
                                     EPerson ePerson)
                              throws SQLException

Specified by:

allMemberGroupsSet in interface GroupService

Throws:

SQLException

allMembers

public List<EPerson> allMembers(Context c,
                                Group g)
                         throws SQLException

Description copied from interface: GroupService

Get all of the EPerson objects who are a member of the specified group, or a member of a subgroup of the specified group, etc.

WARNING: This method may have bad performance for Groups with a very large number of members, as it will load all member EPerson objects into memory. Only use if you need access to *every* EPerson object at once.

Specified by:

allMembers in interface GroupService

Parameters:

c - The relevant DSpace Context.

g - Group object

Returns:

List of EPerson objects

Throws:

SQLException - if error

countAllMembers

public int countAllMembers(Context context,
                           Group group)
                    throws SQLException

Description copied from interface: GroupService

Count all of the EPerson objects who are a member of the specified group, or a member of a subgroup of the specified group, etc. In other words, this will return the size of "allMembers()" without having to load all EPerson objects into memory.

Specified by:

countAllMembers in interface GroupService

Parameters:

context - current DSpace context

group - Group object

Returns:

count of EPerson object members

Throws:

SQLException - if error

find

public Group find(Context context,
                  UUID id)
           throws SQLException

Description copied from interface: DSpaceObjectService

Generic find for when the precise type of an Entity is not known

Specified by:

find in interface DSpaceObjectService<Group>

Parameters:

context - - the context

id - - uuid within table of typed dspace objects

Returns:

the dspace object found, or null if it does not exist.

Throws:

SQLException - only upon failure accessing the database.

findByName

public Group findByName(Context context,
                        String name)
                 throws SQLException

Description copied from interface: GroupService

Find the group by its name - assumes name is unique

Specified by:

findByName in interface GroupService

Parameters:

context - The relevant DSpace Context.

name - Group name to search for

Returns:

the named Group, or null if not found

Throws:

SQLException - if error

findAll

@Deprecated
public List<Group> findAll(Context context,
                           int sortField)
                    throws SQLException

Deprecated.

DEPRECATED: Please use findAll(Context context, List<MetadataField> metadataSortFields) instead

Specified by:

findAll in interface GroupService

Parameters:

context - DSpace context

sortField - sort field index

Returns:

List of all groups in the site

Throws:

SQLException - if error

findAll

public List<Group> findAll(Context context,
                           List<MetadataField> metadataSortFields)
                    throws SQLException

Specified by:

findAll in interface GroupService

Parameters:

context - The relevant DSpace Context.

metadataSortFields - metadata fields to sort by, leave empty to sort by Name

Returns:

List of all groups in the site

Throws:

SQLException - if error

findAll

public List<Group> findAll(Context context,
                           List<MetadataField> metadataSortFields,
                           int pageSize,
                           int offset)
                    throws SQLException

Description copied from interface: GroupService

Finds all groups in the site

Specified by:

findAll in interface GroupService

Parameters:

context - The relevant DSpace Context.

metadataSortFields - metadata fields to sort by, leave empty to sort by Name

pageSize - how many results return

offset - the position of the first result to return

Returns:

List of all groups in the site

Throws:

SQLException - if error

search

public List<Group> search(Context context,
                          String query)
                   throws SQLException

Description copied from interface: GroupService

Find the Groups that match the query across both Group name and Group ID. This is an unpaginated search, which means it will load all matching groups into memory at once. This may provide POOR PERFORMANCE when a large number of groups are matched.

Specified by:

search in interface GroupService

Parameters:

context - DSpace context

query - The search string used to search across group name or group ID

Returns:

List of matching Group objects

Throws:

SQLException - if error

search

public List<Group> search(Context context,
                          String query,
                          int offset,
                          int limit)
                   throws SQLException

Description copied from interface: GroupService

Find the Groups that match the query across both Group name and Group ID. This method supports pagination, which provides better performance than the above non-paginated search() method.

Specified by:

search in interface GroupService

Parameters:

context - DSpace context

query - The search string used to search across group name or group ID

offset - Inclusive offset (the position of the first result to return)

limit - Maximum number of matches returned

Returns:

List of matching Group objects

Throws:

SQLException - if error

searchResultCount

public int searchResultCount(Context context,
                             String query)
                      throws SQLException

Description copied from interface: GroupService

Returns the total number of Groups returned by a specific query. Search is performed based on Group name and Group ID. May be used with search() above to support pagination of matching Groups.

Specified by:

searchResultCount in interface GroupService

Parameters:

context - DSpace context

query - The search string used to search across group name or group ID

Returns:

the number of groups matching the query

Throws:

SQLException - if error

searchNonMembers

public List<Group> searchNonMembers(Context context,
                                    String query,
                                    Group excludeParentGroup,
                                    int offset,
                                    int limit)
                             throws SQLException

Description copied from interface: GroupService

Find the groups that match the search query which are NOT currently members (subgroups) of the given parentGroup

Specified by:

searchNonMembers in interface GroupService

Parameters:

context - DSpace context

query - The search string used to search across group name or group ID

excludeParentGroup - Parent group to exclude results from

offset - Inclusive offset (the position of the first result to return)

limit - Maximum number of matches returned

Returns:

List of matching Group objects

Throws:

SQLException - if error

searchNonMembersCount

public int searchNonMembersCount(Context context,
                                 String query,
                                 Group excludeParentGroup)
                          throws SQLException

Description copied from interface: GroupService

Returns the total number of groups that match the search query which are NOT currently members (subgroups) of the given parentGroup. Can be used with searchNonMembers() to support pagination.

Specified by:

searchNonMembersCount in interface GroupService

Parameters:

context - DSpace context

query - The search string used to search across group name or group ID

excludeParentGroup - Parent group to exclude results from

Returns:

the number of Groups matching the query

Throws:

SQLException - if error

delete

public void delete(Context context,
                   Group group)
            throws SQLException

Specified by:

delete in interface DSpaceObjectService<Group>

Throws:

SQLException

getSupportsTypeConstant

public int getSupportsTypeConstant()

Description copied from interface: DSpaceObjectService

Returns the Constants which this service supports

Specified by:

getSupportsTypeConstant in interface DSpaceObjectLegacySupportService<Group>

Specified by:

getSupportsTypeConstant in interface DSpaceObjectService<Group>

Returns:

a org.dspace.core.Constants that represents a IndexableObject type

isEmpty

public boolean isEmpty(Group group)

Return true if group has no direct or indirect members

Specified by:

isEmpty in interface GroupService

Parameters:

group - DSpace group

Returns:

true or false

initDefaultGroupNames

public void initDefaultGroupNames(Context context)
                           throws SQLException,
                                  AuthorizeException

Description copied from interface: GroupService

Initializes the group names for anonymous and administrator, and marks them "permanent".

Specified by:

initDefaultGroupNames in interface GroupService

Parameters:

context - the DSpace context

Throws:

SQLException - database exception

AuthorizeException - authorization error

getEmptyGroups

public List<Group> getEmptyGroups(Context context)
                           throws SQLException

Get a list of groups with no members.

Specified by:

getEmptyGroups in interface GroupService

Parameters:

context - The relevant DSpace Context.

Returns:

list of groups with no members

Throws:

SQLException - An exception that provides information on a database access error or other errors.

update

public void update(Context context,
                   Group group)
            throws SQLException,
                   AuthorizeException

Update the group - writing out group object and EPerson list if necessary

Specified by:

update in interface DSpaceObjectService<Group>

Overrides:

update in class DSpaceObjectServiceImpl<Group>

Parameters:

context - The relevant DSpace Context.

group - Group to update

Throws:

SQLException - An exception that provides information on a database access error or other errors.

AuthorizeException - Exception indicating the current user of the context does not have permission to perform a particular action.

isEPersonInGroup

protected boolean isEPersonInGroup(Context context,
                                   Group group,
                                   EPerson ePerson)
                            throws SQLException

Throws:

SQLException

rethinkGroupCache

protected void rethinkGroupCache(Context context,
                                 boolean flushQueries)
                          throws SQLException

Regenerate the group cache AKA the group2groupcache table in the database - meant to be called when a group is added or removed from another group

Parameters:

context - The relevant DSpace Context.

flushQueries - flushQueries Flush all pending queries

Throws:

SQLException - An exception that provides information on a database access error or other errors.

getParentObject

public DSpaceObject getParentObject(Context context,
                                    Group group)
                             throws SQLException

Description copied from interface: DSpaceObjectService

Return the dspace object that "own" the current object in the hierarchy. Note that this method has a meaning slightly different from the getAdminObject because it is independent of the action but it is in a way related to it. It defines the "first" dspace object OTHER then the current one, where allowed ADMIN actions imply allowed ADMIN actions on the object self.

Specified by:

getParentObject in interface DSpaceObjectService<Group>

Overrides:

getParentObject in class DSpaceObjectServiceImpl<Group>

Parameters:

context - DSpace context

group - DSpaceObject

Returns:

the dspace object that "own" the current object in the hierarchy

Throws:

SQLException - if database error

updateLastModified

public void updateLastModified(Context context,
                               Group dso)

Specified by:

updateLastModified in interface DSpaceObjectService<Group>

getChildren

protected Set<UUID> getChildren(Map<UUID,Set<UUID>> parents,
                                UUID parent)

Used recursively to generate a map of ALL of the children of the given parent

Parameters:

parents - Map of parent,child relationships

parent - the parent you're interested in

Returns:

Map whose keys are all of the children of a parent

findByIdOrLegacyId

public Group findByIdOrLegacyId(Context context,
                                String id)
                         throws SQLException

Specified by:

findByIdOrLegacyId in interface DSpaceObjectLegacySupportService<Group>

Throws:

SQLException

findByLegacyId

public Group findByLegacyId(Context context,
                            int id)
                     throws SQLException

Description copied from interface: DSpaceObjectLegacySupportService

Generic find for when the precise type of a DSO is not known, just the a pair of type number and database ID.

Specified by:

findByLegacyId in interface DSpaceObjectLegacySupportService<Group>

Parameters:

context - - the context

id - - the legacy id within table of type'd objects

Returns:

the object found, or null if it does not exist.

Throws:

SQLException - only upon failure accessing the database.

countTotal

public int countTotal(Context context)
               throws SQLException

Description copied from interface: GroupService

Count the total number of groups in DSpace

Specified by:

countTotal in interface GroupService

Parameters:

context - The DSpace context

Returns:

The total number of groups

Throws:

SQLException - database exception

findByMetadataField

public List<Group> findByMetadataField(Context context,
                                       String searchValue,
                                       MetadataField metadataField)
                                throws SQLException

Description copied from interface: GroupService

Look up groups based on their value for a certain metadata field (NOTE: name is not stored as metadata)

Specified by:

findByMetadataField in interface GroupService

Parameters:

context - The DSpace context

searchValue - The value to match

metadataField - The metadata field to search in

Returns:

The groups that have a matching value for specified metadata field

Throws:

SQLException - database exception

getName

public String getName(Group dso)

Description copied from interface: DSpaceObjectService

Get a proper name for the object. This may return null. Name should be suitable for display in a user interface.

Specified by:

getName in interface DSpaceObjectService<Group>

Overrides:

getName in class DSpaceObjectServiceImpl<Group>

Parameters:

dso - DSpaceObject

Returns:

Name for the object, or null if it doesn't have one

findByParent

public List<Group> findByParent(Context context,
                                Group parent,
                                int pageSize,
                                int offset)
                         throws SQLException

Description copied from interface: GroupService

Find all groups which are a member of the given Parent group

Specified by:

findByParent in interface GroupService

Parameters:

context - The relevant DSpace Context.

parent - The parent Group to search on

pageSize - how many results return

offset - the position of the first result to return

Returns:

List of all groups which are members of the parent group

Throws:

SQLException - database exception if error

countByParent

public int countByParent(Context context,
                         Group parent)
                  throws SQLException

Description copied from interface: GroupService

Return number of groups which are a member of the given Parent group. Can be used with findByParent() for pagination of all groups within a given Parent group.

Specified by:

countByParent in interface GroupService

Parameters:

context - The relevant DSpace Context.

parent - The parent Group to search on

Returns:

number of groups which are members of the parent group

Throws:

SQLException - database exception if error