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The core O/RM functionality as provided by Hibernate
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.internal;
import java.io.Serializable;
import java.sql.Connection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.jboss.logging.Logger;
import org.hibernate.CacheMode;
import org.hibernate.ConnectionReleaseMode;
import org.hibernate.Criteria;
import org.hibernate.EmptyInterceptor;
import org.hibernate.EntityMode;
import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.Interceptor;
import org.hibernate.LockMode;
import org.hibernate.MappingException;
import org.hibernate.ScrollMode;
import org.hibernate.ScrollableResults;
import org.hibernate.SessionException;
import org.hibernate.StatelessSession;
import org.hibernate.Transaction;
import org.hibernate.UnresolvableObjectException;
import org.hibernate.cache.spi.CacheKey;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.internal.StatefulPersistenceContext;
import org.hibernate.engine.internal.Versioning;
import org.hibernate.engine.query.spi.HQLQueryPlan;
import org.hibernate.engine.query.spi.NativeSQLQueryPlan;
import org.hibernate.engine.query.spi.sql.NativeSQLQuerySpecification;
import org.hibernate.engine.spi.EntityKey;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.NonFlushedChanges;
import org.hibernate.engine.spi.PersistenceContext;
import org.hibernate.engine.spi.QueryParameters;
import org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl;
import org.hibernate.engine.transaction.spi.TransactionCoordinator;
import org.hibernate.engine.transaction.spi.TransactionEnvironment;
import org.hibernate.engine.transaction.spi.TransactionImplementor;
import org.hibernate.id.IdentifierGeneratorHelper;
import org.hibernate.internal.util.collections.CollectionHelper;
import org.hibernate.loader.criteria.CriteriaLoader;
import org.hibernate.loader.custom.CustomLoader;
import org.hibernate.loader.custom.CustomQuery;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.pretty.MessageHelper;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.type.Type;
/**
* @author Gavin King
*/
public class StatelessSessionImpl extends AbstractSessionImpl implements StatelessSession {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, StatelessSessionImpl.class.getName());
private TransactionCoordinator transactionCoordinator;
private PersistenceContext temporaryPersistenceContext = new StatefulPersistenceContext( this );
StatelessSessionImpl(Connection connection, String tenantIdentifier, SessionFactoryImpl factory) {
super( factory, tenantIdentifier );
this.transactionCoordinator = new TransactionCoordinatorImpl( connection, this );
}
// TransactionContext ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public TransactionCoordinator getTransactionCoordinator() {
return transactionCoordinator;
}
@Override
public TransactionEnvironment getTransactionEnvironment() {
return factory.getTransactionEnvironment();
}
// inserts ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public Serializable insert(Object entity) {
errorIfClosed();
return insert(null, entity);
}
@Override
public Serializable insert(String entityName, Object entity) {
errorIfClosed();
EntityPersister persister = getEntityPersister( entityName, entity );
Serializable id = persister.getIdentifierGenerator().generate( this, entity );
Object[] state = persister.getPropertyValues( entity );
if ( persister.isVersioned() ) {
boolean substitute = Versioning.seedVersion(
state, persister.getVersionProperty(), persister.getVersionType(), this
);
if ( substitute ) {
persister.setPropertyValues( entity, state );
}
}
if ( id == IdentifierGeneratorHelper.POST_INSERT_INDICATOR ) {
id = persister.insert(state, entity, this);
}
else {
persister.insert(id, state, entity, this);
}
persister.setIdentifier( entity, id, this );
return id;
}
// deletes ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public void delete(Object entity) {
errorIfClosed();
delete(null, entity);
}
@Override
public void delete(String entityName, Object entity) {
errorIfClosed();
EntityPersister persister = getEntityPersister(entityName, entity);
Serializable id = persister.getIdentifier( entity, this );
Object version = persister.getVersion( entity );
persister.delete(id, version, entity, this);
}
// updates ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public void update(Object entity) {
errorIfClosed();
update(null, entity);
}
@Override
public void update(String entityName, Object entity) {
errorIfClosed();
EntityPersister persister = getEntityPersister(entityName, entity);
Serializable id = persister.getIdentifier( entity, this );
Object[] state = persister.getPropertyValues( entity );
Object oldVersion;
if ( persister.isVersioned() ) {
oldVersion = persister.getVersion( entity );
Object newVersion = Versioning.increment( oldVersion, persister.getVersionType(), this );
Versioning.setVersion(state, newVersion, persister);
persister.setPropertyValues( entity, state );
}
else {
oldVersion = null;
}
persister.update(id, state, null, false, null, oldVersion, entity, null, this);
}
// loading ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public Object get(Class entityClass, Serializable id) {
return get( entityClass.getName(), id );
}
@Override
public Object get(Class entityClass, Serializable id, LockMode lockMode) {
return get( entityClass.getName(), id, lockMode );
}
@Override
public Object get(String entityName, Serializable id) {
return get(entityName, id, LockMode.NONE);
}
@Override
public Object get(String entityName, Serializable id, LockMode lockMode) {
errorIfClosed();
Object result = getFactory().getEntityPersister(entityName)
.load(id, null, lockMode, this);
if ( temporaryPersistenceContext.isLoadFinished() ) {
temporaryPersistenceContext.clear();
}
return result;
}
@Override
public void refresh(Object entity) {
refresh( bestGuessEntityName( entity ), entity, LockMode.NONE );
}
@Override
public void refresh(String entityName, Object entity) {
refresh( entityName, entity, LockMode.NONE );
}
@Override
public void refresh(Object entity, LockMode lockMode) {
refresh( bestGuessEntityName( entity ), entity, lockMode );
}
@Override
public void refresh(String entityName, Object entity, LockMode lockMode) {
final EntityPersister persister = this.getEntityPersister( entityName, entity );
final Serializable id = persister.getIdentifier( entity, this );
if ( LOG.isTraceEnabled() ) {
LOG.tracev( "Refreshing transient {0}", MessageHelper.infoString( persister, id, this.getFactory() ) );
}
// TODO : can this ever happen???
// EntityKey key = new EntityKey( id, persister, source.getEntityMode() );
// if ( source.getPersistenceContext().getEntry( key ) != null ) {
// throw new PersistentObjectException(
// "attempted to refresh transient instance when persistent " +
// "instance was already associated with the Session: " +
// MessageHelper.infoString( persister, id, source.getFactory() )
// );
// }
if ( persister.hasCache() ) {
final CacheKey ck = generateCacheKey( id, persister.getIdentifierType(), persister.getRootEntityName() );
persister.getCacheAccessStrategy().evict( ck );
}
String previousFetchProfile = this.getFetchProfile();
Object result = null;
try {
this.setFetchProfile( "refresh" );
result = persister.load( id, entity, lockMode, this );
}
finally {
this.setFetchProfile( previousFetchProfile );
}
UnresolvableObjectException.throwIfNull( result, id, persister.getEntityName() );
}
@Override
public Object immediateLoad(String entityName, Serializable id)
throws HibernateException {
throw new SessionException("proxies cannot be fetched by a stateless session");
}
@Override
public void initializeCollection(
PersistentCollection collection,
boolean writing) throws HibernateException {
throw new SessionException("collections cannot be fetched by a stateless session");
}
@Override
public Object instantiate(
String entityName,
Serializable id) throws HibernateException {
errorIfClosed();
return getFactory().getEntityPersister( entityName ).instantiate( id, this );
}
@Override
public Object internalLoad(
String entityName,
Serializable id,
boolean eager,
boolean nullable) throws HibernateException {
errorIfClosed();
EntityPersister persister = getFactory().getEntityPersister( entityName );
// first, try to load it from the temp PC associated to this SS
Object loaded = temporaryPersistenceContext.getEntity( generateEntityKey( id, persister ) );
if ( loaded != null ) {
// we found it in the temp PC. Should indicate we are in the midst of processing a result set
// containing eager fetches via join fetch
return loaded;
}
if ( !eager && persister.hasProxy() ) {
// if the metadata allowed proxy creation and caller did not request forceful eager loading,
// generate a proxy
return persister.createProxy( id, this );
}
// otherwise immediately materialize it
return get( entityName, id );
}
@Override
public Iterator iterate(String query, QueryParameters queryParameters) throws HibernateException {
throw new UnsupportedOperationException();
}
@Override
public Iterator iterateFilter(Object collection, String filter, QueryParameters queryParameters)
throws HibernateException {
throw new UnsupportedOperationException();
}
@Override
public List listFilter(Object collection, String filter, QueryParameters queryParameters)
throws HibernateException {
throw new UnsupportedOperationException();
}
@Override
public boolean isOpen() {
return !isClosed();
}
@Override
public void close() {
managedClose();
}
@Override
public ConnectionReleaseMode getConnectionReleaseMode() {
return factory.getSettings().getConnectionReleaseMode();
}
@Override
public boolean shouldAutoJoinTransaction() {
return true;
}
@Override
public boolean isAutoCloseSessionEnabled() {
return factory.getSettings().isAutoCloseSessionEnabled();
}
@Override
public boolean isFlushBeforeCompletionEnabled() {
return true;
}
@Override
public boolean isFlushModeNever() {
return false;
}
@Override
public void managedClose() {
if ( isClosed() ) {
throw new SessionException( "Session was already closed!" );
}
transactionCoordinator.close();
setClosed();
}
@Override
public void managedFlush() {
errorIfClosed();
getTransactionCoordinator().getJdbcCoordinator().executeBatch();
}
@Override
public boolean shouldAutoClose() {
return isAutoCloseSessionEnabled() && !isClosed();
}
@Override
public void afterTransactionBegin(TransactionImplementor hibernateTransaction) {
// nothing to do here
}
@Override
public void beforeTransactionCompletion(TransactionImplementor hibernateTransaction) {
// nothing to do here
}
@Override
public void afterTransactionCompletion(TransactionImplementor hibernateTransaction, boolean successful) {
// nothing to do here
}
@Override
public String onPrepareStatement(String sql) {
return sql;
}
@Override
public String bestGuessEntityName(Object object) {
if (object instanceof HibernateProxy) {
object = ( (HibernateProxy) object ).getHibernateLazyInitializer().getImplementation();
}
return guessEntityName(object);
}
@Override
public Connection connection() {
errorIfClosed();
return transactionCoordinator.getJdbcCoordinator().getLogicalConnection().getDistinctConnectionProxy();
}
@Override
public int executeUpdate(String query, QueryParameters queryParameters)
throws HibernateException {
errorIfClosed();
queryParameters.validateParameters();
HQLQueryPlan plan = getHQLQueryPlan( query, false );
boolean success = false;
int result = 0;
try {
result = plan.performExecuteUpdate( queryParameters, this );
success = true;
}
finally {
afterOperation(success);
}
temporaryPersistenceContext.clear();
return result;
}
@Override
public CacheMode getCacheMode() {
return CacheMode.IGNORE;
}
@Override
public int getDontFlushFromFind() {
return 0;
}
@Override
public Map getEnabledFilters() {
return CollectionHelper.EMPTY_MAP;
}
@Override
public Serializable getContextEntityIdentifier(Object object) {
errorIfClosed();
return null;
}
public EntityMode getEntityMode() {
return EntityMode.POJO;
}
@Override
public EntityPersister getEntityPersister(String entityName, Object object)
throws HibernateException {
errorIfClosed();
if ( entityName==null ) {
return factory.getEntityPersister( guessEntityName( object ) );
}
else {
return factory.getEntityPersister( entityName ).getSubclassEntityPersister( object, getFactory() );
}
}
@Override
public Object getEntityUsingInterceptor(EntityKey key) throws HibernateException {
errorIfClosed();
return null;
}
@Override
public Type getFilterParameterType(String filterParameterName) {
throw new UnsupportedOperationException();
}
@Override
public Object getFilterParameterValue(String filterParameterName) {
throw new UnsupportedOperationException();
}
@Override
public FlushMode getFlushMode() {
return FlushMode.COMMIT;
}
@Override
public Interceptor getInterceptor() {
return EmptyInterceptor.INSTANCE;
}
@Override
public PersistenceContext getPersistenceContext() {
return temporaryPersistenceContext;
}
@Override
public long getTimestamp() {
throw new UnsupportedOperationException();
}
@Override
public String guessEntityName(Object entity) throws HibernateException {
errorIfClosed();
return entity.getClass().getName();
}
@Override
public boolean isConnected() {
return transactionCoordinator.getJdbcCoordinator().getLogicalConnection().isPhysicallyConnected();
}
@Override
public boolean isTransactionInProgress() {
return transactionCoordinator.isTransactionInProgress();
}
@Override
public void setAutoClear(boolean enabled) {
throw new UnsupportedOperationException();
}
@Override
public void disableTransactionAutoJoin() {
throw new UnsupportedOperationException();
}
@Override
public void setCacheMode(CacheMode cm) {
throw new UnsupportedOperationException();
}
@Override
public void setFlushMode(FlushMode fm) {
throw new UnsupportedOperationException();
}
@Override
public Transaction getTransaction() throws HibernateException {
errorIfClosed();
return transactionCoordinator.getTransaction();
}
@Override
public Transaction beginTransaction() throws HibernateException {
errorIfClosed();
Transaction result = getTransaction();
result.begin();
return result;
}
@Override
public boolean isEventSource() {
return false;
}
public boolean isDefaultReadOnly() {
return false;
}
public void setDefaultReadOnly(boolean readOnly) throws HibernateException {
if ( readOnly ) {
throw new UnsupportedOperationException();
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
//TODO: COPY/PASTE FROM SessionImpl, pull up!
@Override
public List list(String query, QueryParameters queryParameters) throws HibernateException {
errorIfClosed();
queryParameters.validateParameters();
HQLQueryPlan plan = getHQLQueryPlan( query, false );
boolean success = false;
List results = CollectionHelper.EMPTY_LIST;
try {
results = plan.performList( queryParameters, this );
success = true;
}
finally {
afterOperation(success);
}
temporaryPersistenceContext.clear();
return results;
}
public void afterOperation(boolean success) {
if ( ! transactionCoordinator.isTransactionInProgress() ) {
transactionCoordinator.afterNonTransactionalQuery( success );
}
}
@Override
public Criteria createCriteria(Class persistentClass, String alias) {
errorIfClosed();
return new CriteriaImpl( persistentClass.getName(), alias, this );
}
@Override
public Criteria createCriteria(String entityName, String alias) {
errorIfClosed();
return new CriteriaImpl(entityName, alias, this);
}
@Override
public Criteria createCriteria(Class persistentClass) {
errorIfClosed();
return new CriteriaImpl( persistentClass.getName(), this );
}
@Override
public Criteria createCriteria(String entityName) {
errorIfClosed();
return new CriteriaImpl(entityName, this);
}
@Override
public ScrollableResults scroll(CriteriaImpl criteria, ScrollMode scrollMode) {
errorIfClosed();
String entityName = criteria.getEntityOrClassName();
CriteriaLoader loader = new CriteriaLoader(
getOuterJoinLoadable( entityName ),
factory,
criteria,
entityName,
getLoadQueryInfluencers()
);
return loader.scroll(this, scrollMode);
}
@Override
@SuppressWarnings( {"unchecked"})
public List list(CriteriaImpl criteria) throws HibernateException {
errorIfClosed();
String[] implementors = factory.getImplementors( criteria.getEntityOrClassName() );
int size = implementors.length;
CriteriaLoader[] loaders = new CriteriaLoader[size];
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