eu.scape_project.watch.dao
Class EntityDAO

java.lang.Object
  eu.scape_project.watch.dao.AbstractDO<Entity>
      eu.scape_project.watch.dao.EntityDAO

public final class EntityDAO
extends AbstractDO<Entity>

Entity data access object.

Author:

Luis Faria

Method Summary

int	count(String bindings) Count the results of a query for Entity.
Entity	findById(String entityName) Find Entity by id.
static String	getEntityRDFId(String entityName) Get Entity RDF ID.
static EntityDAO	getInstance() Get singleton instance.
Collection<Entity>	listWithType(String type, int start, int max) List Entity that have the defined type.
List<Entity>	query(String bindings, int start, int max) Query for Entity.

Methods inherited from class eu.scape_project.watch.dao.AbstractDO

addDOListener, count, delete, delete, findById, fireOnRemoved, fireOnUpdated, query, removeDOListener, save, save

Methods inherited from class java.lang.Object

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

Method Detail

getEntityRDFId

public static String getEntityRDFId(String entityName)

Get Entity RDF ID.

Parameters:

entityName - The entity name that uniquely identifies this entity.

Returns:

Get the RDF ID.

getInstance

public static EntityDAO getInstance()

Get singleton instance.

Returns:

The singleton instance

findById

public Entity findById(String entityName)

Find Entity by id.

Parameters:

entityName - the entity name

Returns:

the Entity or null if not found

query

public List<Entity> query(String bindings,
                          int start,
                          int max)

Query for Entity.

Parameters:

bindings - The query bindings, see AbstractDO.query(Class, String, int, int)

start - The index of the first item to retrieve

max - The maximum number of items to retrieve

Returns:

A list of Entity filtered by the above constraints

See Also:

AbstractDO.query(Class, String, int, int)

count

public int count(String bindings)

Count the results of a query for Entity.

Parameters:

bindings - The query bindings, see AbstractDO.count(Class, String)

Returns:

The number of results expected for the query

listWithType

public Collection<Entity> listWithType(String type,
                                       int start,
                                       int max)

List Entity that have the defined type.

Parameters:

type - the EntityType related to the Entity

start - the index of the first item to return

max - the maximum number of items to return

Returns:

a list of Entity filtered by the defined constraints