org.dspace.content.service

Interface MetadataValueService

All Known Implementing Classes:

MetadataValueServiceImpl

public interface MetadataValueService

Service interface class for the MetadataValue object. The implementation of this class is responsible for all business logic calls for the MetadataValue object and is autowired by spring

Author:

kevinvandevelde at atmire.com

Method Summary

Modifier and Type	Method and Description
int	countTotal(Context context)
MetadataValue	create(Context context, DSpaceObject dso, MetadataField metadataField) Creates a new metadata value.
void	delete(Context context, MetadataValue metadataValue) Delete the metadata field.
void	deleteByMetadataField(Context context, MetadataField metadataField)
MetadataValue	find(Context context, int valueId) Retrieves the metadata value from the database.
List<MetadataValue>	findByField(Context context, MetadataField metadataField) Retrieves the metadata values for a given field from the database.
Iterator<MetadataValue>	findByValueLike(Context context, String value)
MetadataValue	getMinimum(Context context, int metadataFieldId) Get the minimum value of a given metadata field across all objects.
void	update(Context context, MetadataValue metadataValue) Update the metadata value in the database.
void	update(Context context, MetadataValue metadataValue, boolean modifyParentObject)

Method Detail

create

MetadataValue create(Context context,
                     DSpaceObject dso,
                     MetadataField metadataField)
              throws SQLException

Creates a new metadata value.

Parameters:

context - DSpace context object

dso - DSpaceObject

metadataField - metadata field

Returns:

new MetadataValue

Throws:

SQLException - if database error

find

MetadataValue find(Context context,
                   int valueId)
            throws IOException,
                   SQLException

Retrieves the metadata value from the database.

Parameters:

context - dspace context

valueId - database key id of value

Returns:

recalled metadata value

Throws:

IOException

SQLException - if database error

findByField

List<MetadataValue> findByField(Context context,
                                MetadataField metadataField)
                         throws IOException,
                                SQLException

Retrieves the metadata values for a given field from the database.

Parameters:

context - dspace context

metadataField - metadata field whose values to look for

Returns:

a collection of metadata values

Throws:

IOException - if IO error

SQLException - if database error

update

void update(Context context,
            MetadataValue metadataValue)
     throws SQLException

Update the metadata value in the database.

Parameters:

context - dspace context

metadataValue - metadata value

Throws:

SQLException - if database error

update

void update(Context context,
            MetadataValue metadataValue,
            boolean modifyParentObject)
     throws SQLException,
            AuthorizeException

Throws:

SQLException

AuthorizeException

delete

void delete(Context context,
            MetadataValue metadataValue)
     throws SQLException

Delete the metadata field.

Parameters:

context - dspace context

metadataValue - metadata value

Throws:

SQLException - if database error

findByValueLike

Iterator<MetadataValue> findByValueLike(Context context,
                                        String value)
                                 throws SQLException

Throws:

SQLException

deleteByMetadataField

void deleteByMetadataField(Context context,
                           MetadataField metadataField)
                    throws SQLException

Throws:

SQLException

getMinimum

MetadataValue getMinimum(Context context,
                         int metadataFieldId)
                  throws SQLException

Get the minimum value of a given metadata field across all objects.

Parameters:

context -

metadataFieldId - unique identifier of the interesting field.

Returns:

the minimum value of the metadata field

Throws:

SQLException - if database error

countTotal

int countTotal(Context context)
        throws SQLException

Throws:

SQLException