EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.persistence.dao.common;

import java.util.Collection;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.UUID;

import org.hibernate.LockOptions;

import org.hibernate.Session;

import org.springframework.dao.DataAccessException;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.persistence.dao.initializer.IBeanInitializer;

import eu.etaxonomy.cdm.persistence.dto.MergeResult;

import eu.etaxonomy.cdm.persistence.query.Grouping;

import eu.etaxonomy.cdm.persistence.query.OrderHint;

/**

 * An data access interface that all data access classes implement

 * @author m.doering

 * @version 1.0

 * @created 02-Nov-2007 19:36:10

 */

public interface ICdmEntityDao<T extends CdmBase> {

    /**

     * @param transientObject

     * @return

     * @throws DataAccessException

     */

    public UUID saveOrUpdate(T transientObject) throws DataAccessException;

    /**

     * @param newOrManagedObject

     * @return

     * @throws DataAccessException

     */

    public T save(T newOrManagedObject) throws DataAccessException;

    public T merge(T transientObject) throws DataAccessException;

    /**

     * This method allows for the possibility of returning the input transient

     * entity instead of the merged persistent entity

     *

     * WARNING : This method should never be used when the objective of the merge

     * is to attach to an existing session which is the standard use case.

     * This method should only be used in the case of an external call which does

     * not use hibernate sessions and is only interested in the entity as a POJO.

     * This method returns the root merged transient entity as well as all newly merged

     * persistent entities within the return object.

     *

     * @param transientObject

     * @param returnTransientEntity

     * @return transient or persistent object depending on the value of returnTransientEntity

     * @throws DataAccessException

     */

    public MergeResult<T> merge(T transientObject, boolean returnTransientEntity) throws DataAccessException;

    /**

     * Obtains the specified LockMode on the supplied object

     *

     * @param t

     * @param lockOptions

     * @throws DataAccessException

     */

    public void lock(T t, LockOptions lockOptions) throws DataAccessException;

    /**

     * Globally replace all references to instance t1 with t2 (including

     *

     * NOTE: This replaces all non-bidirectional relationships where type T is on the

     * "owning" side of the relationship (since the "owned" objects are, in theory,

     * sub-components of the entity and this kind of global replace doesn't really make sense

     *

     * Consequently it is a good idea to either map such owned relationships with cascading

     * semantics (i.e. CascadeType.DELETE, @OneToMany(orphanRemoval=true)) allowing them to be saved,

     * updated, and deleted along with the owning entity automatically.

     *

     * @param x the object to replace, must not be null

     * @param y the object that will replace. If y is null, then x will be removed from all collections

     *          and all properties that refer to x will be replaced with null

     * @return T the replaced object

     */

    public T replace(T x, T y);

    /**

     * Refreshes the state of the supplied object using the given LockMode (e.g. use LockMode.READ

     * to bypass the second-level cache and session cache and query the database directly)

     *

     * All bean properties given in the <code>propertyPaths</code> parameter are recursively initialized.

     * <p>

     * For detailed description and examples <b>please refer to:</b>

     * {@link IBeanInitializer#initialize(Object, List)}

     *

     * @param t

     * @param lockMode

     * @param propertyPaths

     * @throws DataAccessException

     */

    public void refresh(T t, LockOptions lockOptions, List<String> propertyPaths) throws DataAccessException;

    public void clear() throws DataAccessException;

    public Session getSession() throws DataAccessException;

    public Map<UUID, T> saveAll(Collection<T> cdmObjCollection) throws DataAccessException;

    public Map<UUID, T> saveOrUpdateAll(Collection<T> cdmObjCollection);

    /**

     * @param transientObject

     * @return

     * @throws DataAccessException

     */

    public UUID update(T transientObject) throws DataAccessException;

    /**

     * @param persistentObject

     * @return

     * @throws DataAccessException

     */

    public UUID refresh(T persistentObject) throws DataAccessException;

    /**

     * @param persistentObject

     * @return

     * @throws DataAccessException

     */

    public UUID delete(T persistentObject) throws DataAccessException;

    /**

     * Returns a sublist of CdmBase instances stored in the database.

     * A maximum of 'limit' objects are returned, starting at object with index 'start'.

     * @param limit the maximum number of entities returned (can be null to return all entities)

     * @param start

     * @return

     * @throws DataAccessException

     */

    public List<T> list(Integer limit, Integer start) throws DataAccessException;

    /**

     * Returns a sublist of CdmBase instances stored in the database. A maximum

     * of 'limit' objects are returned, starting at object with index 'start'.

     *

     * @param limit

     *            the maximum number of entities returned (can be null to return

     *            all entities)

     * @param start

     * @param orderHints

     *            Supports path like <code>orderHints.propertyNames</code> which

     *            include *-to-one properties like createdBy.username or

     *            authorTeam.persistentTitleCache

     * @return

     * @throws DataAccessException

     */

    public List<T> list(Integer limit, Integer start, List<OrderHint> orderHints);

    /**

     * Returns a sublist of CdmBase instances stored in the database. A maximum

     * of 'limit' objects are returned, starting at object with index 'start'.

     *

     * @param type

     * @param limit

     *            the maximum number of entities returned (can be null to return

     *            all entities)

     * @param start

     * @param orderHints

     *            Supports path like <code>orderHints.propertyNames</code> which

     *            include *-to-one properties like createdBy.username or

     *            authorTeam.persistentTitleCache

     * @return

     * @throws DataAccessException

     */

    public <S extends T> List<S> list(Class<S> type, Integer limit, Integer start, List<OrderHint> orderHints, List<String> propertyPaths);

    /**

     * Returns a sublist of CdmBase instances stored in the database. A maximum

     * of 'limit' objects are returned, starting at object with index 'start'.

     * The bean properties specified by the parameter <code>propertyPaths</code>

     * and recursively initialized for each of the entities in the resultset

     *

     * For detailed description and examples redarding

     * <code>propertyPaths</code> <b>please refer to:</b>

     * {@link IBeanInitializer#initialize(Object, List)}

     *

     * @param limit

     *            the maximum number of entities returned (can be null to return

     *            all entities)

     * @param start

     * @param orderHints

     *            Supports path like <code>orderHints.propertyNames</code> which

     *            include *-to-one properties like createdBy.username or

     *            authorTeam.persistentTitleCache

     * @param propertyPaths

     * @return

     * @throws DataAccessException

     */

    public List<T> list(Integer limit, Integer start, List<OrderHint> orderHints, List<String> propertyPaths);

    /**

     * Returns a sublist of CdmBase instances of type <TYPE> stored in the database.

     * A maximum of 'limit' objects are returned, starting at object with index 'start'.

     * @param limit the maximum number of entities returned (can be null to return all entities)

     * @param start

     * @return

     * @throws DataAccessException

     */

    public <S extends T> List<S> list(Class<S> type, Integer limit, Integer start) throws DataAccessException;

    /**

     * Returns a sublist of objects matching the grouping projections supplied using the groups parameter

     *

     * It would be nice to have an equivalent countGroups method, but for the moment hibernate doesn't

     * seem to support this (HHH-3238 - impossible to get the rowcount for a criteria that has projections)

     *

     * @param clazz Restrict the query to objects of a certain class, or null for all objects of type T or subclasses

     * @param limit the maximum number of entities returned (can be null to return

     *            all entities)

     * @param start The (0-based) offset from the start of the recordset

     * @param groups The grouping objects representing a projection, plus an optional ordering on that projected property

     * @param propertyPaths paths initialized on the returned objects - only applied to the objects returned from the first grouping

     * @return a list of arrays of objects, each matching the grouping objects supplied in the parameters.

     */

    public List<Object[]> group(Class<? extends T> clazz,Integer limit, Integer start, List<Grouping> groups, List<String> propertyPaths);

    public List<T> rows(String tableName, int limit, int start) throws DataAccessException;

    /**

     * @param id

     * @return

     * @throws DataAccessException

     */

    public T findById(int id) throws DataAccessException;

    /**

     * Finds the cdm entity specified by the id parameter and

     * recursively initializes all bean properties given in the

     * <code>propertyPaths</code> parameter.

     * <p>

     * For detailed description and examples <b>please refer to:</b>

     * {@link IBeanInitializer#initialize(Object, List)}

     *

     * @param id

     * @param propertyPaths properties to be initialized

     * @return

     */

    public T load(int id, List<String> propertyPaths);

    /**

     * @param ids

     * @param pageSize

     * @param pageNumber

     * @param orderHints

     * @param propertyPaths

     * @return

     * @throws DataAccessException

     */

    public List<T> listByIds(Collection<Integer> ids, Integer pageSize, Integer pageNumber, List<OrderHint> orderHints, List<String> propertyPaths) throws DataAccessException;

    /**

     * @param Uuid

     * @return

     * @throws DataAccessException

     */

    public T findByUuid(UUID Uuid) throws DataAccessException;

    /**

     * Method to find CDM Entity by Uuid, by making sure that the underlying

     * hibernate session is not flushed (Session.FLUSH_MODE set to MANUAL temporarily)

     * when performing the read query.

     *

     * @param Uuid

     * @return

     * @throws DataAccessException

     */

    public T findByUuidWithoutFlush(UUID uuid) throws DataAccessException;

    /**

     * @param uuids

     * @param pageSize

     * @param pageNumber

     * @param orderHints

     * @param propertyPaths

     * @return

     * @throws DataAccessException

     */

    public List<T> list(Collection<UUID> uuids, Integer pageSize, Integer pageNumber, List<OrderHint> orderHints, List<String> propertyPaths) throws DataAccessException;

    /**

     * Finds the cdm entity specified by the <code>uuid</code> parameter and

     * initializes all its *ToOne relations.

     *

     * @param uuid

     * @return

     */

    public T load(UUID uuid);

    /**

     * Finds the cdm entity specified by the <code>uuid</code> parameter and

     * recursively initializes all bean properties given in the

     * <code>propertyPaths</code> parameter.

     * <p>

     * For detailed description and examples <b>please refer to:</b>

     * {@link IBeanInitializer#initialize(Object, List)}

     *

     * @param uuid

     * @param propertyPaths properties to be initialized

     * @return

     */

    public T load(UUID uuid, List<String> propertyPaths);

    /**

     * @param uuid

     * @return

     * @throws DataAccessException

     */

    public Boolean exists(UUID uuid) throws DataAccessException;

    public int count();

    /**

     * Returns the number of objects of type <T> - which must extend T

     * @param <T>

     * @param clazz

     * @return

     */

    public int count(Class<? extends T> clazz);

    /**

     * FIXME Should this method exist : I would expect flushing of a session to be

     * something that a DAO should hide?

     */

    public void flush();

    /**

     * Convenience method which makes it easy to discover what type of object this DAO returns at runtime

     *

     * @return

     */

    public Class<T> getType();

    /**

     * Method that counts the number of objects matching the example provided.

     * The includeProperties property is used to specify which properties of the example are used.

     *

     * If includeProperties is null or empty, then all literal properties are used (restrictions are

     * applied as in the Hibernate Query-By-Example API call Example.create(object)).

     *

     * If includeProperties is not empty then only literal properties that are named in the set are used to

     * create restrictions, *PLUS* any *ToOne related entities. Related entities are matched on ID, not by

     * their internal literal values (e.g. the call is criteria.add(Restrictions.eq(property,relatedObject)), not

     * criteria.createCriteria(property).add(Example.create(relatedObject)))

     *

     * @param example

     * @param includeProperties

     * @return a count of matching objects

     */

    public int count(T example, Set<String> includeProperties);

    /**

     * Method that lists the objects matching the example provided.

     * The includeProperties property is used to specify which properties of the example are used.

     *

     * If includeProperties is null or empty, then all literal properties are used (restrictions are

     * applied as in the Hibernate Query-By-Example API call Example.create(object)).

     *

     * If includeProperties is not empty then only literal properties that are named in the set are used to

     * create restrictions, *PLUS* any *ToOne related entities. Related entities are matched on ID, not by

     * their internal literal values (e.g. the call is criteria.add(Restrictions.eq(property,relatedObject)), not

     * criteria.createCriteria(property).add(Example.create(relatedObject)))

     *

     * @param example

     * @param includeProperties

     * @param limit the maximum number of entities returned (can be null to return

     *            all entities)

     * @param start The (0-based) offset from the start of the recordset

     * @param orderHints

     *            Supports path like <code>orderHints.propertyNames</code> which

     *            include *-to-one properties like createdBy.username or

     * @param propertyPaths paths initialized on the returned objects - only applied to the objects returned from the first grouping

     * @return a list of matching objects

     */

    public List<T> list(T example, Set<String> includeProperties, Integer limit, Integer start, List<OrderHint> orderHints, List<String> propertyPaths);

}