org.loom.persistence
Class AbstractExtendedEntityManagerOperations

java.lang.Object
  org.loom.persistence.AbstractExtendedEntityManagerOperations

All Implemented Interfaces:

ExtendedEntityManagerOperations, org.springframework.orm.jpa.EntityManagerPlusOperations

Direct Known Subclasses:

HibernateEntityManagerOperations

public abstract class AbstractExtendedEntityManagerOperations
extends java.lang.Object
implements ExtendedEntityManagerOperations

Default implementation of the extended operations

Author:

icoloma

Constructor Summary

AbstractExtendedEntityManagerOperations(javax.persistence.EntityManager entityManager)

Method Summary

<T> T	find(java.lang.Class<T> clazz, java.lang.Object id) Retrieves a single persistent instance from the database
<T> java.util.List<T>	find(java.lang.String queryString, java.lang.Object... params) Retrieves a non-paged query.
<T> java.util.List<T>	findAll(java.lang.Class<T> clazz) Retrieves all records for a specified persistent class This method should be used with care, as it could instantiate huge amounts of data.
<T> java.util.List<T>	findNamed(java.lang.String namedQuery, java.lang.Object... params) Retrieves a non-paged query This method should be used with care, as it could instantiate huge amounts of data.
<T> T	findNamedSingle(java.lang.String namedQuery, java.lang.Object... params) Execute a query that retrieves a single object.
<T> T	findSingle(java.lang.String queryString, java.lang.Object... params)
javax.persistence.EntityManager	getEntityManager()
<T> PagedListData<T>	query(PagedListCriteria criteria) Retrieve a paged query.
<T> T	remove(java.lang.Class<T> clazz, java.lang.Object id) Removes a persistent instance
int	update(java.lang.String queryString, java.lang.Object... params) Execute a query that updates the database.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.loom.persistence.ExtendedEntityManagerOperations

evict, getIdPropertyName, getVersionPropertyName, getVersionValue, setReadOnly

Constructor Detail

AbstractExtendedEntityManagerOperations

public AbstractExtendedEntityManagerOperations(javax.persistence.EntityManager entityManager)

Method Detail

query

public <T> PagedListData<T> query(PagedListCriteria criteria)

Description copied from interface: ExtendedEntityManagerOperations

Retrieve a paged query. The query can include a sorting order, which would then be appended to the sort indicated by the page object, if any.

Specified by:

query in interface ExtendedEntityManagerOperations

Type Parameters:

T - The type of the result items

Parameters:

criteria - The criteria of the paged query: page index, page size, sorting, etc.

Returns:

The paged result, sorted and paged according to the provided arguments.

find

public <T> java.util.List<T> find(java.lang.String queryString,
                                  java.lang.Object... params)

Description copied from interface: ExtendedEntityManagerOperations

Retrieves a non-paged query. Use with care, this method could potentially instantiate large amounts of data.

Specified by:

find in interface ExtendedEntityManagerOperations

Type Parameters:

T - The type of the result items

Parameters:

queryString - the query to execute

params - the parameters to be added to the query, in order

Returns:

The result of executing the query

findSingle

public <T> T findSingle(java.lang.String queryString,
                        java.lang.Object... params)

Specified by:

findSingle in interface ExtendedEntityManagerOperations

Parameters:

queryString - the query to execute

params - the parameters to be added to the query, in order

Returns:

a single object that satisfies the query.

remove

public <T> T remove(java.lang.Class<T> clazz,
                    java.lang.Object id)

Description copied from interface: ExtendedEntityManagerOperations

Removes a persistent instance

Specified by:

remove in interface ExtendedEntityManagerOperations

Type Parameters:

T - The persistent class

Parameters:

clazz - The persistent class

id - the primary key to remove

Returns:

the removed instance

findAll

public <T> java.util.List<T> findAll(java.lang.Class<T> clazz)

Description copied from interface: ExtendedEntityManagerOperations

Retrieves all records for a specified persistent class This method should be used with care, as it could instantiate huge amounts of data.

Specified by:

findAll in interface ExtendedEntityManagerOperations

Type Parameters:

T - The persistent class to retrieve

Parameters:

clazz - The persistent class to retrieve

Returns:

The list of all records found on the database

find

public <T> T find(java.lang.Class<T> clazz,
                  java.lang.Object id)

Description copied from interface: ExtendedEntityManagerOperations

Retrieves a single persistent instance from the database

Specified by:

find in interface ExtendedEntityManagerOperations

Type Parameters:

T - The class to retrieve

Parameters:

clazz - The class to retrieve

id - The primary key to retrieve

Returns:

The retrieved object

findNamed

public <T> java.util.List<T> findNamed(java.lang.String namedQuery,
                                       java.lang.Object... params)

Description copied from interface: ExtendedEntityManagerOperations

Retrieves a non-paged query This method should be used with care, as it could instantiate huge amounts of data.

Specified by:

findNamed in interface ExtendedEntityManagerOperations

Type Parameters:

T - The type of the result items

Parameters:

namedQuery - the named query to execute

params - the parameters to be added to the query, in order

Returns:

The result of executing the query

findNamedSingle

public <T> T findNamedSingle(java.lang.String namedQuery,
                             java.lang.Object... params)

Description copied from interface: ExtendedEntityManagerOperations

Execute a query that retrieves a single object. This method should be used with care, as it could instantiate huge amounts of data.

Specified by:

findNamedSingle in interface ExtendedEntityManagerOperations

Type Parameters:

T - The type of the result items

Parameters:

namedQuery - the named query to execute

params - the parameters to be added to the query, in order

Returns:

a single object that satisfies the named query.

update

public int update(java.lang.String queryString,
                  java.lang.Object... params)

Description copied from interface: ExtendedEntityManagerOperations

Execute a query that updates the database.

Specified by:

update in interface ExtendedEntityManagerOperations

Parameters:

queryString - the update/delete/insert query to execute

params - the parameters to be added to the query, in order

Returns:

the number of records that were modified

getEntityManager

public javax.persistence.EntityManager getEntityManager()