Package org.dspace.content.service

Interface RelationshipService

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      int countByItem​(Context context, Item item)
      This method returns a count of Relationship objects that have the given Item object as a leftItem or a rightItem
      int countByItem​(Context context, Item item, boolean excludeTilted, boolean excludeNonLatest)
      This method returns a count of Relationship objects that have the given Item object as a leftItem or a rightItem
      int countByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType, boolean isLeft)
      Count total number of relationships (rows in relationship table) by a relationship type and a boolean indicating whether the relationship should contain the item on the left side or not NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      int countByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType, boolean isLeft, boolean excludeNonLatest)
      Count total number of relationships (rows in relationship table) by a relationship type and a boolean indicating whether the relationship should contain the item on the left side or not NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      int countByItemRelationshipTypeAndRelatedList​(Context context, UUID focusUUID, RelationshipType relationshipType, List<UUID> items, boolean isLeft)
      Count total number of relationships that match focusItem on the one hand and matches list of related items elsewhere.
      int countByRelationshipType​(Context context, RelationshipType relationshipType)
      Count total number of relationships (rows in relationship table) by a relationship type NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      int countByTypeName​(Context context, String typeName)
      Count total number of relationships (rows in relationship table) by a relationship leftward or rightward typeName
      int countTotal​(Context context)
      counts all relationships
      Relationship create​(Context c, Item leftItem, Item rightItem, RelationshipType relationshipType, int leftPlace, int rightPlace)
      This method is used to construct a Relationship object with all it's variables, except the leftward label, rightward label and latest version status
      Relationship create​(Context c, Item leftItem, Item rightItem, RelationshipType relationshipType, int leftPlace, int rightPlace, String leftwardValue, String rightwardValue)
      This method is used to construct a Relationship object with all it's variables, except the latest version status
      Relationship create​(Context c, Item leftItem, Item rightItem, RelationshipType relationshipType, int leftPlace, int rightPlace, String leftwardValue, String rightwardValue, Relationship.LatestVersionStatus latestVersionStatus)
      This method is used to construct a Relationship object with all it's variables
      Relationship create​(Context context, Relationship relationship)
      This method creates a relationship object in the database equal to the given relationship param if this is a valid relationship
      void delete​(Context context, Relationship relationship, boolean copyToLeftItem, boolean copyToRightItem)
      This method is used to delete a Relationship whilst given the possibility to copy the Virtual Metadata created by this relationship to the left and/or right item
      List<Relationship> findAll​(Context context)
      Retrieves the full list of relationships currently in the system
      List<Relationship> findAll​(Context context, Integer limit, Integer offset)
      Retrieves the full list of relationships currently in the system
      List<Relationship> findByItem​(Context context, Item item)
      Retrieves the list of Relationships currently in the system for which the given Item is either a leftItem or a rightItem object
      List<Relationship> findByItem​(Context context, Item item, Integer limit, Integer offset, boolean excludeTilted)
      Retrieves the list of Relationships currently in the system for which the given Item is either a leftItem or a rightItem object
      List<Relationship> findByItem​(Context context, Item item, Integer limit, Integer offset, boolean excludeTilted, boolean excludeNonLatest)
      Retrieves the list of Relationships currently in the system for which the given Item is either a leftItem or a rightItem object
      List<Relationship> findByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType)
      This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType, boolean isLeft, int limit, int offset)
      This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType, boolean isLeft, int limit, int offset, boolean excludeNonLatest)
      This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType, int limit, int offset)
      This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByItemAndRelationshipType​(Context context, Item item, RelationshipType relationshipType, int limit, int offset, boolean excludeNonLatest)
      This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByItemRelationshipTypeAndRelatedList​(Context context, UUID focusUUID, RelationshipType relationshipType, List<UUID> items, boolean isLeft, int offset, int limit)
      This method is used to retrieve relationships that match focusItem on the one hand and matches list of related items elsewhere.
      List<ItemUuidAndRelationshipId> findByLatestItemAndRelationshipType​(Context context, Item latestItem, RelationshipType relationshipType, boolean isLeft)
      This method returns the UUIDs of all items that have a relationship with the given item, from the perspective of the other item.
      List<Relationship> findByRelationshipType​(Context context, RelationshipType relationshipType)
      This method returns a list of Relationship objects for which the relationshipType property is equal to the given RelationshipType object NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByRelationshipType​(Context context, RelationshipType relationshipType, Integer limit, Integer offset)
      This method returns a list of Relationship objets for which the relationshipType property is equal to the given RelationshipType object NOTE: tilted relationships are NEVER excluded when fetching one relationship type
      List<Relationship> findByTypeName​(Context context, String typeName)
      This method returns a list of Relationship objects for the given typeName
      List<Relationship> findByTypeName​(Context context, String typeName, Integer limit, Integer offset)
      This method returns a list of Relationship objects for the given typeName
      void forceDelete​(Context context, Relationship relationship, boolean copyToLeftItem, boolean copyToRightItem)
      This method is used to delete a Relationship whilst given the possibility to copy the Virtual Metadata created by this relationship to the left and/or right item.
      Relationship move​(Context context, Relationship relationship, Integer newLeftPlace, Integer newRightPlace)
      Move the given relationship to a new leftPlace and/or rightPlace.
      Relationship move​(Context context, Relationship relationship, Item newLeftItem, Item newRightItem)
      Move the given relationship to a new leftItem and/or rightItem.
      void updateItem​(Context context, Item relatedItem)
      This method will update the given item's metadata order.

    • Method Detail

      • findByItem

        List<Relationship> findByItem​(Context context,
                              Item item)
                       throws SQLException
        Retrieves the list of Relationships currently in the system for which the given Item is either a leftItem or a rightItem object
        Parameters:
        context - The relevant DSpace context
        item - The Item that has to be the left or right item for the relationship to be included in the list
        Returns:
        The list of relationships for which each relationship adheres to the above listed constraint
        Throws:
        SQLException - If something goes wrong

      • findByItem

        List<Relationship> findByItem​(Context context,
                              Item item,
                              Integer limit,
                              Integer offset,
                              boolean excludeTilted)
                       throws SQLException
        Retrieves the list of Relationships currently in the system for which the given Item is either a leftItem or a rightItem object
        Parameters:
        context - The relevant DSpace context
        item - The Item that has to be the left or right item for the relationship to be included in the list
        limit - paging limit
        offset - paging offset
        excludeTilted - If true, excludes tilted relationships
        Returns:
        The list of relationships for which each relationship adheres to the above listed constraint
        Throws:
        SQLException - If something goes wrong

      • findByItem

        List<Relationship> findByItem​(Context context,
                              Item item,
                              Integer limit,
                              Integer offset,
                              boolean excludeTilted,
                              boolean excludeNonLatest)
                       throws SQLException
        Retrieves the list of Relationships currently in the system for which the given Item is either a leftItem or a rightItem object
        Parameters:
        context - The relevant DSpace context
        item - The Item that has to be the left or right item for the relationship to be included in the list
        limit - paging limit
        offset - paging offset
        excludeTilted - If true, excludes tilted relationships
        excludeNonLatest - If true, excludes all relationships for which the other item has a more recent version that is relevant for this relationship
        Returns:
        The list of relationships for which each relationship adheres to the above listed constraint
        Throws:
        SQLException - If something goes wrong

      • findAll

        List<Relationship> findAll​(Context context)
                    throws SQLException
        Retrieves the full list of relationships currently in the system
        Parameters:
        context - The relevant DSpace context
        Returns:
        The list of all relationships currently in the system
        Throws:
        SQLException - If something goes wrong

      • findAll

        List<Relationship> findAll​(Context context,
                           Integer limit,
                           Integer offset)
                    throws SQLException
        Retrieves the full list of relationships currently in the system
        Parameters:
        context - The relevant DSpace context
        limit - paging limit
        offset - paging offset
        Returns:
        The list of all relationships currently in the system
        Throws:
        SQLException - If something goes wrong

      • create

        Relationship create​(Context context,
                    Relationship relationship)
             throws SQLException,
                    AuthorizeException
        This method creates a relationship object in the database equal to the given relationship param if this is a valid relationship
        Parameters:
        context - The relevant DSpace context
        relationship - The relationship that will be created in the database if it is valid
        Returns:
        The created relationship with updated place variables
        Throws:
        SQLException - If something goes wrong
        AuthorizeException - If something goes wrong with authorizations

      • move

        Relationship move​(Context context,
                  Relationship relationship,
                  Integer newLeftPlace,
                  Integer newRightPlace)
           throws SQLException,
                  AuthorizeException
        Move the given relationship to a new leftPlace and/or rightPlace. This will 1. verify whether the move is authorized 2. move the relationship to the specified left/right place 3. update the left/right place of other relationships and/or metadata in order to resolve the move without leaving any gaps At least one of the new places should be non-null, otherwise no changes will be made.
        Parameters:
        context - The relevant DSpace context
        relationship - The Relationship to move
        newLeftPlace - The value to set the leftPlace of this Relationship to
        newRightPlace - The value to set the rightPlace of this Relationship to
        Returns:
        The moved relationship with updated place variables
        Throws:
        SQLException - If something goes wrong
        AuthorizeException - If the user is not authorized to update the Relationship or its Items

      • move

        Relationship move​(Context context,
                  Relationship relationship,
                  Item newLeftItem,
                  Item newRightItem)
           throws SQLException,
                  AuthorizeException
        Move the given relationship to a new leftItem and/or rightItem. This will 1. move the relationship to the last place in its current left or right Item. This ensures that we don't leave any gaps when moving the relationship to a new Item. If only one of the relationship's Items is changed,the order of relationships and metadatain the other will not be affected 2. insert the relationship into the new Item(s) At least one of the new Items should be non-null, otherwise no changes will be made.
        Parameters:
        context - The relevant DSpace context
        relationship - The Relationship to move
        newLeftItem - The value to set the leftItem of this Relationship to
        newRightItem - The value to set the rightItem of this Relationship to
        Returns:
        The moved relationship with updated left/right Items variables
        Throws:
        SQLException - If something goes wrong
        AuthorizeException - If the user is not authorized to update the Relationship or its Items

      • findByItemAndRelationshipType

        List<Relationship> findByItemAndRelationshipType​(Context context,
                                                 Item item,
                                                 RelationshipType relationshipType)
                                          throws SQLException
        This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        item - The Item object to be matched on the leftItem or rightItem for the relationship
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        Returns:
        The list of Relationship objects that have the given Item object as leftItem or rightItem and for which the relationshipType property is equal to the given RelationshipType
        Throws:
        SQLException - If something goes wrong

      • findByItemAndRelationshipType

        List<Relationship> findByItemAndRelationshipType​(Context context,
                                                 Item item,
                                                 RelationshipType relationshipType,
                                                 int limit,
                                                 int offset)
                                          throws SQLException
        This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        item - The Item object to be matched on the leftItem or rightItem for the relationship
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        Returns:
        The list of Relationship objects that have the given Item object as leftItem or rightItem and for which the relationshipType property is equal to the given RelationshipType
        Throws:
        SQLException - If something goes wrong

      • findByItemAndRelationshipType

        List<Relationship> findByItemAndRelationshipType​(Context context,
                                                 Item item,
                                                 RelationshipType relationshipType,
                                                 int limit,
                                                 int offset,
                                                 boolean excludeNonLatest)
                                          throws SQLException
        This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        item - The Item object to be matched on the leftItem or rightItem for the relationship
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        excludeNonLatest - If true, excludes all relationships for which the other item has a more recent version that is relevant for this relationship
        Returns:
        The list of Relationship objects that have the given Item object as leftItem or rightItem and for which the relationshipType property is equal to the given RelationshipType
        Throws:
        SQLException - If something goes wrong

      • findByItemAndRelationshipType

        List<Relationship> findByItemAndRelationshipType​(Context context,
                                                 Item item,
                                                 RelationshipType relationshipType,
                                                 boolean isLeft,
                                                 int limit,
                                                 int offset)
                                          throws SQLException
        This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        item - The Item object to be matched on the leftItem or rightItem for the relationship
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        isLeft - Is the item left or right
        Returns:
        The list of Relationship objects that have the given Item object as leftItem or rightItem and for which the relationshipType property is equal to the given RelationshipType
        Throws:
        SQLException - If something goes wrong

      • findByItemAndRelationshipType

        List<Relationship> findByItemAndRelationshipType​(Context context,
                                                 Item item,
                                                 RelationshipType relationshipType,
                                                 boolean isLeft,
                                                 int limit,
                                                 int offset,
                                                 boolean excludeNonLatest)
                                          throws SQLException
        This method returns a list of Relationships for which the leftItem or rightItem is equal to the given Item object and for which the RelationshipType object is equal to the relationshipType property NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        item - The Item object to be matched on the leftItem or rightItem for the relationship
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        isLeft - Is the item left or right
        excludeNonLatest - If true, excludes all relationships for which the other item has a more recent version that is relevant for this relationship
        Returns:
        The list of Relationship objects that have the given Item object as leftItem or rightItem and for which the relationshipType property is equal to the given RelationshipType
        Throws:
        SQLException - If something goes wrong

      • findByLatestItemAndRelationshipType

        List<ItemUuidAndRelationshipId> findByLatestItemAndRelationshipType​(Context context,
                                                                    Item latestItem,
                                                                    RelationshipType relationshipType,
                                                                    boolean isLeft)
                                                             throws SQLException
        This method returns the UUIDs of all items that have a relationship with the given item, from the perspective of the other item. In other words, given a relationship with the given item, the given item should have "latest status" in order for the other item uuid to be returned. This method differs from the "excludeNonLatest" property in other methods, because in this method the current item should have "latest status" to return the other item, whereas with "excludeNonLatest" the other item should have "latest status" to be returned. This method is used to index items in solr; when searching for related items of one of the returned uuids, the given item should appear as a search result. NOTE: This method does not return Relationships for performance, because doing so would eagerly fetch the items on both sides, which is unnecessary. NOTE: tilted relationships are NEVER excluded when fetching one relationship type.
        Parameters:
        context - the DSpace context.
        latestItem - the target item; only relationships where this item has "latest status" should be considered.
        relationshipType - the relationship type for which relationships should be selected.
        isLeft - whether the entity type of the item occurs on the left or right side of the relationship type. This is redundant in most cases, but necessary because relationship types my have the same entity type on both sides.
        Returns:
        a list containing pairs of relationship ids and item uuids.
        Throws:
        SQLException - if something goes wrong.

      • updateItem

        void updateItem​(Context context,
                Item relatedItem)
         throws SQLException,
                AuthorizeException
        This method will update the given item's metadata order. If the relationships for the item have been modified and will calculate the place based on a metadata field, this function will ensure the place is calculated.
        Parameters:
        context - The relevant DSpace context
        relatedItem - The Item for which the list of Relationship location is calculated based on a metadata field
        Throws:
        SQLException - If something goes wrong
        AuthorizeException - If the user is not authorized to update the item

      • findByRelationshipType

        List<Relationship> findByRelationshipType​(Context context,
                                          RelationshipType relationshipType)
                                   throws SQLException
        This method returns a list of Relationship objects for which the relationshipType property is equal to the given RelationshipType object NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        Returns:
        The list of Relationship objects for which the given RelationshipType object is equal to the relationshipType property
        Throws:
        SQLException - If something goes wrong

      • findByRelationshipType

        List<Relationship> findByRelationshipType​(Context context,
                                          RelationshipType relationshipType,
                                          Integer limit,
                                          Integer offset)
                                   throws SQLException
        This method returns a list of Relationship objets for which the relationshipType property is equal to the given RelationshipType object NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - The relevant DSpace context
        relationshipType - The RelationshipType object that will be used to check the Relationship on
        limit - paging limit
        offset - paging offset
        Returns:
        The list of Relationship objects for which the given RelationshipType object is equal to the relationshipType property
        Throws:
        SQLException - If something goes wrong

      • create

        Relationship create​(Context c,
                    Item leftItem,
                    Item rightItem,
                    RelationshipType relationshipType,
                    int leftPlace,
                    int rightPlace,
                    String leftwardValue,
                    String rightwardValue,
                    Relationship.LatestVersionStatus latestVersionStatus)
             throws AuthorizeException,
                    SQLException
        This method is used to construct a Relationship object with all it's variables
        Parameters:
        c - The relevant DSpace context
        leftItem - The leftItem Item object for the relationship
        rightItem - The rightItem Item object for the relationship
        relationshipType - The RelationshipType object for the relationship
        leftPlace - The leftPlace integer for the relationship
        rightPlace - The rightPlace integer for the relationship
        leftwardValue - The leftwardValue string for the relationship
        rightwardValue - The rightwardValue string for the relationship
        latestVersionStatus - The latestVersionStatus value for the relationship
        Returns:
        The created Relationship object with the given properties
        Throws:
        AuthorizeException - If something goes wrong
        SQLException - If something goes wrong

      • create

        Relationship create​(Context c,
                    Item leftItem,
                    Item rightItem,
                    RelationshipType relationshipType,
                    int leftPlace,
                    int rightPlace,
                    String leftwardValue,
                    String rightwardValue)
             throws AuthorizeException,
                    SQLException
        This method is used to construct a Relationship object with all it's variables, except the latest version status
        Parameters:
        c - The relevant DSpace context
        leftItem - The leftItem Item object for the relationship
        rightItem - The rightItem Item object for the relationship
        relationshipType - The RelationshipType object for the relationship
        leftPlace - The leftPlace integer for the relationship
        rightPlace - The rightPlace integer for the relationship
        leftwardValue - The leftwardValue string for the relationship
        rightwardValue - The rightwardValue string for the relationship
        Returns:
        The created Relationship object with the given properties
        Throws:
        AuthorizeException - If something goes wrong
        SQLException - If something goes wrong

      • create

        Relationship create​(Context c,
                    Item leftItem,
                    Item rightItem,
                    RelationshipType relationshipType,
                    int leftPlace,
                    int rightPlace)
             throws AuthorizeException,
                    SQLException
        This method is used to construct a Relationship object with all it's variables, except the leftward label, rightward label and latest version status
        Parameters:
        c - The relevant DSpace context
        leftItem - The leftItem Item object for the relationship
        rightItem - The rightItem Item object for the relationship
        relationshipType - The RelationshipType object for the relationship
        leftPlace - The leftPlace integer for the relationship
        rightPlace - The rightPlace integer for the relationship
        Returns:
        The created Relationship object with the given properties
        Throws:
        AuthorizeException - If something goes wrong
        SQLException - If something goes wrong

      • findByTypeName

        List<Relationship> findByTypeName​(Context context,
                                  String typeName)
                           throws SQLException
        This method returns a list of Relationship objects for the given typeName
        Parameters:
        context - The relevant DSpace context
        typeName - The leftward or rightward typeName of the relationship type
        Returns:
        A list of Relationship objects that have the given RelationshipType object as the relationshipType property
        Throws:
        SQLException - If something goes wrong

      • findByTypeName

        List<Relationship> findByTypeName​(Context context,
                                  String typeName,
                                  Integer limit,
                                  Integer offset)
                           throws SQLException
        This method returns a list of Relationship objects for the given typeName
        Parameters:
        context - The relevant DSpace context
        typeName - The leftward or rightward typeName of the relationship type
        limit - paging limit
        offset - paging offset
        Returns:
        A list of Relationship objects that have the given RelationshipType object as the relationshipType property
        Throws:
        SQLException - If something goes wrong

      • countTotal

        int countTotal​(Context context)
        throws SQLException
        counts all relationships
        Parameters:
        context - DSpace context object
        Returns:
        total relationships
        Throws:
        SQLException - if database error

      • countByRelationshipType

        int countByRelationshipType​(Context context,
                            RelationshipType relationshipType)
                     throws SQLException
        Count total number of relationships (rows in relationship table) by a relationship type NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - context
        relationshipType - relationship type to filter by
        Returns:
        total count
        Throws:
        SQLException - if database error

      • countByItem

        int countByItem​(Context context,
                Item item)
         throws SQLException
        This method returns a count of Relationship objects that have the given Item object as a leftItem or a rightItem
        Parameters:
        context - The relevant DSpace context
        item - The item that should be either a leftItem or a rightItem of all the Relationship objects in the returned list
        Returns:
        The list of Relationship objects that contain either a left or a right item that is equal to the given item
        Throws:
        SQLException - If something goes wrong

      • countByItem

        int countByItem​(Context context,
                Item item,
                boolean excludeTilted,
                boolean excludeNonLatest)
         throws SQLException
        This method returns a count of Relationship objects that have the given Item object as a leftItem or a rightItem
        Parameters:
        context - The relevant DSpace context
        item - The item that should be either a leftItem or a rightItem of all the Relationship objects in the returned list
        excludeTilted - if true, excludes tilted relationships
        excludeNonLatest - if true, exclude relationships for which the opposite item is not the latest version that is relevant
        Returns:
        The list of Relationship objects that contain either a left or a right item that is equal to the given item
        Throws:
        SQLException - If something goes wrong

      • countByItemAndRelationshipType

        int countByItemAndRelationshipType​(Context context,
                                   Item item,
                                   RelationshipType relationshipType,
                                   boolean isLeft)
                            throws SQLException
        Count total number of relationships (rows in relationship table) by a relationship type and a boolean indicating whether the relationship should contain the item on the left side or not NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - context
        relationshipType - relationship type to filter by
        isLeft - Indicating whether the counted Relationships should have the given Item on the left side or not
        Returns:
        total count with the given parameters
        Throws:
        SQLException - if database error

      • countByItemAndRelationshipType

        int countByItemAndRelationshipType​(Context context,
                                   Item item,
                                   RelationshipType relationshipType,
                                   boolean isLeft,
                                   boolean excludeNonLatest)
                            throws SQLException
        Count total number of relationships (rows in relationship table) by a relationship type and a boolean indicating whether the relationship should contain the item on the left side or not NOTE: tilted relationships are NEVER excluded when fetching one relationship type
        Parameters:
        context - context
        relationshipType - relationship type to filter by
        isLeft - Indicating whether the counted Relationships should have the given Item on the left side
        excludeNonLatest - If true, excludes all relationships for which the other item has a more recent version that is relevant for this relationship
        Returns:
        total count with the given parameters
        Throws:
        SQLException - if database error

      • countByTypeName

        int countByTypeName​(Context context,
                    String typeName)
             throws SQLException
        Count total number of relationships (rows in relationship table) by a relationship leftward or rightward typeName
        Parameters:
        context - context
        typeName - typeName of relationship
        Returns:
        total count
        Throws:
        SQLException - if database error

      • delete

        void delete​(Context context,
            Relationship relationship,
            boolean copyToLeftItem,
            boolean copyToRightItem)
     throws SQLException,
            AuthorizeException
        This method is used to delete a Relationship whilst given the possibility to copy the Virtual Metadata created by this relationship to the left and/or right item
        Parameters:
        context - The relevant DSpace context
        relationship - The relationship to be deleted
        copyToLeftItem - A boolean indicating whether we should copy metadata to the left item or not
        copyToRightItem - A boolean indicating whether we should copy metadata to the right item or not
        Throws:
        SQLException
        AuthorizeException

      • forceDelete

        void forceDelete​(Context context,
                 Relationship relationship,
                 boolean copyToLeftItem,
                 boolean copyToRightItem)
          throws SQLException,
                 AuthorizeException
        This method is used to delete a Relationship whilst given the possibility to copy the Virtual Metadata created by this relationship to the left and/or right item. This method will bypass the cardinality checks on the RelationshipType for the given Relationship This should only be used during the deletion of items so that the min cardinality check can't disallow items to be deleted
        Parameters:
        context - The relevant DSpace context
        relationship - The relationship to be deleted
        copyToLeftItem - A boolean indicating whether we should copy metadata to the left item or not
        copyToRightItem - A boolean indicating whether we should copy metadata to the right item or not
        Throws:
        SQLException
        AuthorizeException

      • findByItemRelationshipTypeAndRelatedList

        List<Relationship> findByItemRelationshipTypeAndRelatedList​(Context context,
                                                            UUID focusUUID,
                                                            RelationshipType relationshipType,
                                                            List<UUID> items,
                                                            boolean isLeft,
                                                            int offset,
                                                            int limit)
                                                     throws SQLException
        This method is used to retrieve relationships that match focusItem on the one hand and matches list of related items elsewhere.
        Parameters:
        context - DSpace context object
        focusUUID - UUID of Item that will match left side if the param isLeft is true otherwise right side
        relationshipType - Relationship type to filter by
        items - List of UUID that will use to filter other side respect the focusUUID
        isLeft - Indicating whether the counted Relationships should have the given Item on the left side or not
        limit - paging limit
        offset - paging offset
        Returns:
        Throws:
        SQLException - If database error

      • countByItemRelationshipTypeAndRelatedList

        int countByItemRelationshipTypeAndRelatedList​(Context context,
                                              UUID focusUUID,
                                              RelationshipType relationshipType,
                                              List<UUID> items,
                                              boolean isLeft)
                                       throws SQLException
        Count total number of relationships that match focusItem on the one hand and matches list of related items elsewhere.
        Parameters:
        context - DSpace context object
        focusUUID - UUID of Item that will match left side if the param isLeft is true otherwise right side
        relationshipType - Relationship type to filter by
        items - List of UUID that will use to filter other side respect the focusUUID
        isLeft - Indicating whether the counted Relationships should have the given Item on the left side or not
        Returns:
        Throws:
        SQLException - If database error