org.tynamo.hibernate.services
Class HibernatePersistenceServiceImpl

java.lang.Object
  org.tynamo.hibernate.services.HibernatePersistenceServiceImpl

All Implemented Interfaces:

HibernatePersistenceService, PersistenceService

public class HibernatePersistenceServiceImpl
extends Object
implements HibernatePersistenceService

Constructor Summary

HibernatePersistenceServiceImpl(org.slf4j.Logger logger, DescriptorService descriptorService, org.hibernate.Session session, org.apache.tapestry5.hibernate.HibernateSessionManager sessionManager)

Method Summary

protected org.hibernate.criterion.DetachedCriteria	alterCriteria(Class type, org.hibernate.criterion.DetachedCriteria detachedCriteria) This hook allows subclasses to modify the query criteria, such as for security
int	count(Class type, org.hibernate.criterion.DetachedCriteria detachedCriteria)
List	findByQuery(String queryString) Execute an HQL query.
List	findByQuery(String queryString, int startIndex, int maxResults, QueryParameter... parameters) Execute an HQL query.
List	findByQuery(String queryString, QueryParameter... parameters) Execute an HQL query.
Serializable	getIdentifier(Object data, TynamoClassDescriptor classDescriptor) Returns an entity's pk.
<T> T	getInstance(Class<T> type) (non-Javadoc)
<T> T	getInstance(Class<T> type, org.hibernate.criterion.DetachedCriteria detachedCriteria) https://trails.dev.java.net/servlets/ReadMsg?listName=users&msgNo=1226 Very often I find myself writing: Object example = new Object(); example.setProperty(uniqueValue); List objects = ((TynamoPage)getPage()).getPersistenceService().getInstances(example); (MyObject)objects.get(0); when, in fact, I know that the single property I populated my example object with should be unique, and thus only one object should be returned
<T> T	getInstance(Class<T> type, Serializable id) (non-Javadoc)
<T> List<T>	getInstances(Class<T> type) (non-Javadoc)
<T> List<T>	getInstances(Class<T> type, org.hibernate.criterion.DetachedCriteria criteria)
<T> List<T>	getInstances(Class<T> type, org.hibernate.criterion.DetachedCriteria detachedCriteria, int startIndex, int maxResults)
<T> List<T>	getInstances(Class<T> type, int startIndex, int maxResults)
List	getInstances(org.hibernate.criterion.DetachedCriteria detachedCriteria, int startIndex, int maxResults)
List	getInstances(Object example, TynamoClassDescriptor classDescriptor) Does a query by example
boolean	isTransient(Object data, TynamoClassDescriptor classDescriptor)
<T> T	loadInstance(Class<T> type, Serializable id) Description copied from: Session.load(Class,java.io.Serializable) Return the persistent instance of the given entity class with the given identifier, assuming that the instance exists, throwing an exception if not found.
<T> T	merge(T instance)
void	reattach(Object model) (non-Javadoc)
void	remove(Object instance)
void	removeAll(Collection collection)
void	removeCollectionElement(String removeExpression, Object member, Object parent)
<T> T	save(T instance) (non-Javadoc)
<T> T	saveCollectionElement(String addExpression, T member, Object parent)
<T> T	saveOrUpdate(T instance)

Methods inherited from class java.lang.Object

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

Constructor Detail

HibernatePersistenceServiceImpl

public HibernatePersistenceServiceImpl(org.slf4j.Logger logger,
                                       DescriptorService descriptorService,
                                       org.hibernate.Session session,
                                       org.apache.tapestry5.hibernate.HibernateSessionManager sessionManager)

Method Detail

getInstance

public <T> T getInstance(Class<T> type,
                         org.hibernate.criterion.DetachedCriteria detachedCriteria)

https://trails.dev.java.net/servlets/ReadMsg?listName=users&msgNo=1226

Very often I find myself writing: Object example = new Object(); example.setProperty(uniqueValue); List objects = ((TynamoPage)getPage()).getPersistenceService().getInstances(example); (MyObject)objects.get(0); when, in fact, I know that the single property I populated my example object with should be unique, and thus only one object should be returned

Specified by:

getInstance in interface HibernatePersistenceService

Parameters:

type - The type to use to check for security restrictions.

detachedCriteria -

Returns:

getInstance

public <T> T getInstance(Class<T> type,
                         Serializable id)

(non-Javadoc)

Specified by:

getInstance in interface PersistenceService

See Also:

PersistenceService.getInstance(Class,Serializable)

loadInstance

public <T> T loadInstance(Class<T> type,
                          Serializable id)

Description copied from: Session.load(Class,java.io.Serializable)

Return the persistent instance of the given entity class with the given identifier, assuming that the instance exists, throwing an exception if not found.

You should not use this method to determine if an instance exists (use get() instead). Use this only to retrieve an instance that you assume exists, where non-existence would be an actual error.

This method is a thin wrapper around Session.load(Class,java.io.Serializable) for convenience. For an explanation of the exact semantics of this method, please do refer to the Hibernate API documentation in the first instance.

Specified by:

loadInstance in interface PersistenceService

Parameters:

type - a persistent class

id - the identifier of the persistent instance

Returns:

the persistent instance

See Also:

Session.load(Class,java.io.Serializable)

findByQuery

public List findByQuery(String queryString)

Execute an HQL query.

Specified by:

findByQuery in interface HibernatePersistenceService

Parameters:

queryString - a query expressed in Hibernate's query language

Returns:

a List of entities containing the results of the query execution

findByQuery

public List findByQuery(String queryString,
                        QueryParameter... parameters)

Execute an HQL query.

Specified by:

findByQuery in interface HibernatePersistenceService

Parameters:

queryString - a query expressed in Hibernate's query language

parameters - the (optional) parameters for the query.

Returns:

a List of entities containing the results of the query execution

findByQuery

public List findByQuery(String queryString,
                        int startIndex,
                        int maxResults,
                        QueryParameter... parameters)

Execute an HQL query.

Specified by:

findByQuery in interface HibernatePersistenceService

Parameters:

queryString - a query expressed in Hibernate's query language

startIndex - the index of the first item to be retrieved

maxResults - the number of items to be retrieved, if 0 it retrieves ALL the items

parameters - the (optional) parameters for the query.

Returns:

a List of entities containing the results of the query execution

getInstances

public <T> List<T> getInstances(Class<T> type)

(non-Javadoc)

Specified by:

getInstances in interface PersistenceService

See Also:

PersistenceService.getInstances(java.lang.Class)

getInstances

public <T> List<T> getInstances(Class<T> type,
                                int startIndex,
                                int maxResults)

Specified by:

getInstances in interface PersistenceService

save

public <T> T save(T instance)

(non-Javadoc)

Specified by:

save in interface HibernatePersistenceService

Specified by:

save in interface PersistenceService

See Also:

PersistenceService.save(java.lang.Object)

removeAll

public void removeAll(Collection collection)

Specified by:

removeAll in interface PersistenceService

remove

public void remove(Object instance)

Specified by:

remove in interface HibernatePersistenceService

Specified by:

remove in interface PersistenceService

getInstances

public <T> List<T> getInstances(Class<T> type,
                                org.hibernate.criterion.DetachedCriteria criteria)

Specified by:

getInstances in interface HibernatePersistenceService

reattach

public void reattach(Object model)

(non-Javadoc)

Specified by:

reattach in interface HibernatePersistenceService

Parameters:

model - to attach to the current persistence session

See Also:

org.tynamo.services.PersistenceService#getAllTypes()

getInstance

public <T> T getInstance(Class<T> type)

(non-Javadoc)

Specified by:

getInstance in interface PersistenceService

See Also:

org.tynamo.services.PersistenceService#getInstance(Class)

getIdentifier

public Serializable getIdentifier(Object data,
                                  TynamoClassDescriptor classDescriptor)

Returns an entity's pk.

Parameters:

data -

classDescriptor -

Returns:

isTransient

public boolean isTransient(Object data,
                           TynamoClassDescriptor classDescriptor)

Specified by:

isTransient in interface PersistenceService

getInstances

public List getInstances(Object example,
                         TynamoClassDescriptor classDescriptor)

Description copied from interface: HibernatePersistenceService

Does a query by example

Specified by:

getInstances in interface HibernatePersistenceService

Returns:

count

public int count(Class type,
                 org.hibernate.criterion.DetachedCriteria detachedCriteria)

Specified by:

count in interface HibernatePersistenceService

getInstances

public <T> List<T> getInstances(Class<T> type,
                                org.hibernate.criterion.DetachedCriteria detachedCriteria,
                                int startIndex,
                                int maxResults)

Specified by:

getInstances in interface HibernatePersistenceService

getInstances

public List getInstances(org.hibernate.criterion.DetachedCriteria detachedCriteria,
                         int startIndex,
                         int maxResults)

alterCriteria

protected org.hibernate.criterion.DetachedCriteria alterCriteria(Class type,
                                                                 org.hibernate.criterion.DetachedCriteria detachedCriteria)

This hook allows subclasses to modify the query criteria, such as for security

Parameters:

detachedCriteria - The original Criteria query

Returns:

The modified Criteria query for execution

merge

public <T> T merge(T instance)

Specified by:

merge in interface HibernatePersistenceService

See Also:

HibernatePersistenceService.saveOrUpdate(java.lang.Object)

saveOrUpdate

public <T> T saveOrUpdate(T instance)

Specified by:

saveOrUpdate in interface HibernatePersistenceService

See Also:

HibernatePersistenceService.saveOrUpdate(java.lang.Object)

saveCollectionElement

public <T> T saveCollectionElement(String addExpression,
                                   T member,
                                   Object parent)

Specified by:

saveCollectionElement in interface PersistenceService

removeCollectionElement

public void removeCollectionElement(String removeExpression,
                                    Object member,
                                    Object parent)

Specified by:

removeCollectionElement in interface PersistenceService