dk.netarkivet.harvester.datamodel.extendedfield
Class ExtendedFieldTypeDAO

java.lang.Object
  dk.netarkivet.harvester.datamodel.extendedfield.ExtendedFieldTypeDAO

Direct Known Subclasses:

ExtendedFieldTypeDBDAO

public abstract class ExtendedFieldTypeDAO
extends java.lang.Object

Interface for creating and accessing extended fields in persistent storage.

Field Summary

protected static ExtendedFieldTypeDAO

instance The database singleton model.

Constructor Summary

protected

ExtendedFieldTypeDAO() constructor used when creating singleton.

Method Summary

abstract boolean	exists(java.lang.Long aExtendedfieldtypeId) Tests if exists an ExtendedFieldType with the given ID.
abstract java.util.List<ExtendedFieldType>	getAll()
static ExtendedFieldTypeDAO	getInstance() If an instance exists, return it, otherwise instantiate one, and return it.
abstract ExtendedFieldType	read(java.lang.Long aExtendedfieldtypeId) Read an ExtendedFieldType belonging to the given id.
protected static void	reset() Reset the DAO instance.

Methods inherited from class java.lang.Object

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

Field Detail

instance

protected static ExtendedFieldTypeDAO instance

The database singleton model.

Constructor Detail

ExtendedFieldTypeDAO

protected ExtendedFieldTypeDAO()

constructor used when creating singleton. Do not call directly.

Method Detail

reset

protected static void reset()

Reset the DAO instance. Only for use from within tests.

exists

public abstract boolean exists(java.lang.Long aExtendedfieldtypeId)

Tests if exists an ExtendedFieldType with the given ID.

Parameters:

aExtendedfieldtypeId - An id belonging to an ExtendedFieldType

Returns:

true, if there exists an ExtendedFieldType with the given ID, otherwise returns false.

read

public abstract ExtendedFieldType read(java.lang.Long aExtendedfieldtypeId)

Read an ExtendedFieldType belonging to the given id.

Parameters:

aExtendedfieldtypeId - an id belonging to a ExtendedFieldType

Returns:

an ExtendedFieldType from belonging to the given id.

getAll

public abstract java.util.List<ExtendedFieldType> getAll()

Returns:

a list of all ExtendedFieldTypes.

getInstance

public static ExtendedFieldTypeDAO getInstance()

If an instance exists, return it, otherwise instantiate one, and return it.

Returns:

the instance of this class.