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Hibernate example source code file (EventListenerRegistryImpl.java)
This example Hibernate source code file (EventListenerRegistryImpl.java) is included in the DevDaily.com
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The Hibernate EventListenerRegistryImpl.java source code
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 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.event.service.internal;
import java.lang.reflect.Array;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.hibernate.HibernateException;
import org.hibernate.event.spi.EventType;
import org.hibernate.event.internal.DefaultAutoFlushEventListener;
import org.hibernate.event.internal.DefaultDeleteEventListener;
import org.hibernate.event.internal.DefaultDirtyCheckEventListener;
import org.hibernate.event.internal.DefaultEvictEventListener;
import org.hibernate.event.internal.DefaultFlushEntityEventListener;
import org.hibernate.event.internal.DefaultFlushEventListener;
import org.hibernate.event.internal.DefaultInitializeCollectionEventListener;
import org.hibernate.event.internal.DefaultLoadEventListener;
import org.hibernate.event.internal.DefaultLockEventListener;
import org.hibernate.event.internal.DefaultMergeEventListener;
import org.hibernate.event.internal.DefaultPersistEventListener;
import org.hibernate.event.internal.DefaultPersistOnFlushEventListener;
import org.hibernate.event.internal.DefaultPostLoadEventListener;
import org.hibernate.event.internal.DefaultPreLoadEventListener;
import org.hibernate.event.internal.DefaultRefreshEventListener;
import org.hibernate.event.internal.DefaultReplicateEventListener;
import org.hibernate.event.internal.DefaultSaveEventListener;
import org.hibernate.event.internal.DefaultSaveOrUpdateEventListener;
import org.hibernate.event.internal.DefaultUpdateEventListener;
import org.hibernate.event.service.spi.DuplicationStrategy;
import org.hibernate.event.service.spi.EventListenerRegistrationException;
import org.hibernate.event.service.spi.EventListenerRegistry;
import static org.hibernate.event.spi.EventType.AUTO_FLUSH;
import static org.hibernate.event.spi.EventType.DELETE;
import static org.hibernate.event.spi.EventType.DIRTY_CHECK;
import static org.hibernate.event.spi.EventType.EVICT;
import static org.hibernate.event.spi.EventType.FLUSH;
import static org.hibernate.event.spi.EventType.FLUSH_ENTITY;
import static org.hibernate.event.spi.EventType.INIT_COLLECTION;
import static org.hibernate.event.spi.EventType.LOAD;
import static org.hibernate.event.spi.EventType.LOCK;
import static org.hibernate.event.spi.EventType.MERGE;
import static org.hibernate.event.spi.EventType.PERSIST;
import static org.hibernate.event.spi.EventType.PERSIST_ONFLUSH;
import static org.hibernate.event.spi.EventType.POST_COLLECTION_RECREATE;
import static org.hibernate.event.spi.EventType.POST_COLLECTION_REMOVE;
import static org.hibernate.event.spi.EventType.POST_COLLECTION_UPDATE;
import static org.hibernate.event.spi.EventType.POST_COMMIT_DELETE;
import static org.hibernate.event.spi.EventType.POST_COMMIT_INSERT;
import static org.hibernate.event.spi.EventType.POST_COMMIT_UPDATE;
import static org.hibernate.event.spi.EventType.POST_DELETE;
import static org.hibernate.event.spi.EventType.POST_INSERT;
import static org.hibernate.event.spi.EventType.POST_LOAD;
import static org.hibernate.event.spi.EventType.POST_UPDATE;
import static org.hibernate.event.spi.EventType.PRE_COLLECTION_RECREATE;
import static org.hibernate.event.spi.EventType.PRE_COLLECTION_REMOVE;
import static org.hibernate.event.spi.EventType.PRE_COLLECTION_UPDATE;
import static org.hibernate.event.spi.EventType.PRE_DELETE;
import static org.hibernate.event.spi.EventType.PRE_INSERT;
import static org.hibernate.event.spi.EventType.PRE_LOAD;
import static org.hibernate.event.spi.EventType.PRE_UPDATE;
import static org.hibernate.event.spi.EventType.REFRESH;
import static org.hibernate.event.spi.EventType.REPLICATE;
import static org.hibernate.event.spi.EventType.SAVE;
import static org.hibernate.event.spi.EventType.SAVE_UPDATE;
import static org.hibernate.event.spi.EventType.UPDATE;
/**
* @author Steve Ebersole
*/
public class EventListenerRegistryImpl implements EventListenerRegistry {
private Map<Class,Object> listenerClassToInstanceMap = new HashMap();
private Map<EventType,EventListenerGroupImpl> registeredEventListenersMap = prepareListenerMap();
@SuppressWarnings({ "unchecked" })
public <T> EventListenerGroupImpl getEventListenerGroup(EventType eventType) {
EventListenerGroupImpl<T> listeners = registeredEventListenersMap.get( eventType );
if ( listeners == null ) {
throw new HibernateException( "Unable to find listeners for type [" + eventType.eventName() + "]" );
}
return listeners;
}
@Override
public void addDuplicationStrategy(DuplicationStrategy strategy) {
for ( EventListenerGroupImpl group : registeredEventListenersMap.values() ) {
group.addDuplicationStrategy( strategy );
}
}
@Override
public <T> void setListeners(EventType type, Class... listenerClasses) {
setListeners( type, resolveListenerInstances( type, listenerClasses ) );
}
@SuppressWarnings( {"unchecked"})
private <T> T[] resolveListenerInstances(EventType type, Class... listenerClasses) {
T[] listeners = (T[]) Array.newInstance( type.baseListenerInterface(), listenerClasses.length );
for ( int i = 0; i < listenerClasses.length; i++ ) {
listeners[i] = resolveListenerInstance( listenerClasses[i] );
}
return listeners;
}
@SuppressWarnings( {"unchecked"})
private <T> T resolveListenerInstance(Class listenerClass) {
T listenerInstance = (T) listenerClassToInstanceMap.get( listenerClass );
if ( listenerInstance == null ) {
listenerInstance = instantiateListener( listenerClass );
listenerClassToInstanceMap.put( listenerClass, listenerInstance );
}
return listenerInstance;
}
private <T> T instantiateListener(Class listenerClass) {
try {
return listenerClass.newInstance();
}
catch ( Exception e ) {
throw new EventListenerRegistrationException(
"Unable to instantiate specified event listener class: " + listenerClass.getName(),
e
);
}
}
@Override
public <T> void setListeners(EventType type, T... listeners) {
EventListenerGroupImpl<T> registeredListeners = getEventListenerGroup( type );
registeredListeners.clear();
if ( listeners != null ) {
for ( int i = 0, max = listeners.length; i < max; i++ ) {
registeredListeners.appendListener( listeners[i] );
}
}
}
@Override
public <T> void appendListeners(EventType type, Class... listenerClasses) {
appendListeners( type, resolveListenerInstances( type, listenerClasses ) );
}
@Override
public <T> void appendListeners(EventType type, T... listeners) {
getEventListenerGroup( type ).appendListeners( listeners );
}
@Override
public <T> void prependListeners(EventType type, Class... listenerClasses) {
prependListeners( type, resolveListenerInstances( type, listenerClasses ) );
}
@Override
public <T> void prependListeners(EventType type, T... listeners) {
getEventListenerGroup( type ).prependListeners( listeners );
}
private static Map<EventType,EventListenerGroupImpl> prepareListenerMap() {
final Map<EventType,EventListenerGroupImpl> workMap = new HashMap();
// auto-flush listeners
prepareListeners(
AUTO_FLUSH,
new DefaultAutoFlushEventListener(),
workMap
);
// create listeners
prepareListeners(
PERSIST,
new DefaultPersistEventListener(),
workMap
);
// create-onflush listeners
prepareListeners(
PERSIST_ONFLUSH,
new DefaultPersistOnFlushEventListener(),
workMap
);
// delete listeners
prepareListeners(
DELETE,
new DefaultDeleteEventListener(),
workMap
);
// dirty-check listeners
prepareListeners(
DIRTY_CHECK,
new DefaultDirtyCheckEventListener(),
workMap
);
// evict listeners
prepareListeners(
EVICT,
new DefaultEvictEventListener(),
workMap
);
// flush listeners
prepareListeners(
FLUSH,
new DefaultFlushEventListener(),
workMap
);
// flush-entity listeners
prepareListeners(
FLUSH_ENTITY,
new DefaultFlushEntityEventListener(),
workMap
);
// load listeners
prepareListeners(
LOAD,
new DefaultLoadEventListener(),
workMap
);
// load-collection listeners
prepareListeners(
INIT_COLLECTION,
new DefaultInitializeCollectionEventListener(),
workMap
);
// lock listeners
prepareListeners(
LOCK,
new DefaultLockEventListener(),
workMap
);
// merge listeners
prepareListeners(
MERGE,
new DefaultMergeEventListener(),
workMap
);
// pre-collection-recreate listeners
prepareListeners(
PRE_COLLECTION_RECREATE,
workMap
);
// pre-collection-remove listeners
prepareListeners(
PRE_COLLECTION_REMOVE,
workMap
);
// pre-collection-update listeners
prepareListeners(
PRE_COLLECTION_UPDATE,
workMap
);
// pre-delete listeners
prepareListeners(
PRE_DELETE,
workMap
);
// pre-insert listeners
prepareListeners(
PRE_INSERT,
workMap
);
// pre-load listeners
prepareListeners(
PRE_LOAD,
new DefaultPreLoadEventListener(),
workMap
);
// pre-update listeners
prepareListeners(
PRE_UPDATE,
workMap
);
// post-collection-recreate listeners
prepareListeners(
POST_COLLECTION_RECREATE,
workMap
);
// post-collection-remove listeners
prepareListeners(
POST_COLLECTION_REMOVE,
workMap
);
// post-collection-update listeners
prepareListeners(
POST_COLLECTION_UPDATE,
workMap
);
// post-commit-delete listeners
prepareListeners(
POST_COMMIT_DELETE,
workMap
);
// post-commit-insert listeners
prepareListeners(
POST_COMMIT_INSERT,
workMap
);
// post-commit-update listeners
prepareListeners(
POST_COMMIT_UPDATE,
workMap
);
// post-delete listeners
prepareListeners(
POST_DELETE,
workMap
);
// post-insert listeners
prepareListeners(
POST_INSERT,
workMap
);
// post-load listeners
prepareListeners(
POST_LOAD,
new DefaultPostLoadEventListener(),
workMap
);
// post-update listeners
prepareListeners(
POST_UPDATE,
workMap
);
// update listeners
prepareListeners(
UPDATE,
new DefaultUpdateEventListener(),
workMap
);
// refresh listeners
prepareListeners(
REFRESH,
new DefaultRefreshEventListener(),
workMap
);
// replicate listeners
prepareListeners(
REPLICATE,
new DefaultReplicateEventListener(),
workMap
);
// save listeners
prepareListeners(
SAVE,
new DefaultSaveEventListener(),
workMap
);
// save-update listeners
prepareListeners(
SAVE_UPDATE,
new DefaultSaveOrUpdateEventListener(),
workMap
);
return Collections.unmodifiableMap( workMap );
}
private static <T> void prepareListeners(EventType type, Map map) {
prepareListeners( type, null, map );
}
private static <T> void prepareListeners(EventType type, T defaultListener, Map map) {
final EventListenerGroupImpl<T> listeners = new EventListenerGroupImpl( type );
if ( defaultListener != null ) {
listeners.appendListener( defaultListener );
}
map.put( type, listeners );
}
}
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