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Hibernate example source code file (EventType.java)

This example Hibernate source code file (EventType.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Hibernate tags/keywords

class, class, eventtype, eventtype, hibernateexception, load, map, map, override, privilegedaction, reflection, security, string, string, t, unable, util

The Hibernate EventType.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.spi;

import java.lang.reflect.Field;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import org.hibernate.HibernateException;

/**
 * Enumeration of the recognized types of events, including meta-information about each.
 *
 * @author Steve Ebersole
 */
public class EventType<T> {
	public static final EventType<LoadEventListener> LOAD
			= new EventType<LoadEventListener>( "load", LoadEventListener.class );
	public static final EventType<InitializeCollectionEventListener> INIT_COLLECTION
			= new EventType<InitializeCollectionEventListener>( "load-collection", InitializeCollectionEventListener.class );

	public static final EventType<SaveOrUpdateEventListener> SAVE_UPDATE
			= new EventType<SaveOrUpdateEventListener>( "save-update", SaveOrUpdateEventListener.class );
	public static final EventType<SaveOrUpdateEventListener> UPDATE
			= new EventType<SaveOrUpdateEventListener>( "update", SaveOrUpdateEventListener.class );
	public static final EventType<SaveOrUpdateEventListener> SAVE
			= new EventType<SaveOrUpdateEventListener>( "save", SaveOrUpdateEventListener.class );
	public static final EventType<PersistEventListener> PERSIST
			= new EventType<PersistEventListener>( "create", PersistEventListener.class );
	public static final EventType<PersistEventListener> PERSIST_ONFLUSH
			= new EventType<PersistEventListener>( "create-onflush", PersistEventListener.class );

	public static final EventType<MergeEventListener> MERGE
			= new EventType<MergeEventListener>( "merge", MergeEventListener.class );

	public static final EventType<DeleteEventListener> DELETE
			= new EventType<DeleteEventListener>( "delete", DeleteEventListener.class );

	public static final EventType<ReplicateEventListener> REPLICATE
			= new EventType<ReplicateEventListener>( "replicate", ReplicateEventListener.class );

	public static final EventType<FlushEventListener> FLUSH
			= new EventType<FlushEventListener>( "flush", FlushEventListener.class );
	public static final EventType<AutoFlushEventListener> AUTO_FLUSH
			= new EventType<AutoFlushEventListener>( "auto-flush", AutoFlushEventListener.class );
	public static final EventType<DirtyCheckEventListener> DIRTY_CHECK
			= new EventType<DirtyCheckEventListener>( "dirty-check", DirtyCheckEventListener.class );
	public static final EventType<FlushEntityEventListener> FLUSH_ENTITY
			= new EventType<FlushEntityEventListener>( "flush-entity", FlushEntityEventListener.class );

	public static final EventType<EvictEventListener> EVICT
			= new EventType<EvictEventListener>( "evict", EvictEventListener.class );

	public static final EventType<LockEventListener> LOCK
			= new EventType<LockEventListener>( "lock", LockEventListener.class );

	public static final EventType<RefreshEventListener> REFRESH
			= new EventType<RefreshEventListener>( "refresh", RefreshEventListener.class );

	public static final EventType<PreLoadEventListener> PRE_LOAD
			= new EventType<PreLoadEventListener>( "pre-load", PreLoadEventListener.class );
	public static final EventType<PreDeleteEventListener> PRE_DELETE
			= new EventType<PreDeleteEventListener>( "pre-delete", PreDeleteEventListener.class );
	public static final EventType<PreUpdateEventListener> PRE_UPDATE
			= new EventType<PreUpdateEventListener>( "pre-update", PreUpdateEventListener.class );
	public static final EventType<PreInsertEventListener> PRE_INSERT
			= new EventType<PreInsertEventListener>( "pre-insert", PreInsertEventListener.class );

	public static final EventType<PostLoadEventListener> POST_LOAD
			= new EventType<PostLoadEventListener>( "post-load", PostLoadEventListener.class );
	public static final EventType<PostDeleteEventListener> POST_DELETE
			= new EventType<PostDeleteEventListener>( "post-delete", PostDeleteEventListener.class );
	public static final EventType<PostUpdateEventListener> POST_UPDATE
			= new EventType<PostUpdateEventListener>( "post-update", PostUpdateEventListener.class );
	public static final EventType<PostInsertEventListener> POST_INSERT
			= new EventType<PostInsertEventListener>( "post-insert", PostInsertEventListener.class );

	public static final EventType<PostDeleteEventListener> POST_COMMIT_DELETE
			= new EventType<PostDeleteEventListener>( "post-commit-delete", PostDeleteEventListener.class );
	public static final EventType<PostUpdateEventListener> POST_COMMIT_UPDATE
			= new EventType<PostUpdateEventListener>( "post-commit-update", PostUpdateEventListener.class );
	public static final EventType<PostInsertEventListener> POST_COMMIT_INSERT
			= new EventType<PostInsertEventListener>( "post-commit-insert", PostInsertEventListener.class );

	public static final EventType<PreCollectionRecreateEventListener> PRE_COLLECTION_RECREATE
			= new EventType<PreCollectionRecreateEventListener>( "pre-collection-recreate", PreCollectionRecreateEventListener.class );
	public static final EventType<PreCollectionRemoveEventListener> PRE_COLLECTION_REMOVE
			= new EventType<PreCollectionRemoveEventListener>( "pre-collection-remove", PreCollectionRemoveEventListener.class );
	public static final EventType<PreCollectionUpdateEventListener> PRE_COLLECTION_UPDATE
			= new EventType<PreCollectionUpdateEventListener>( "pre-collection-update", PreCollectionUpdateEventListener.class );

	public static final EventType<PostCollectionRecreateEventListener> POST_COLLECTION_RECREATE
			= new EventType<PostCollectionRecreateEventListener>( "post-collection-recreate", PostCollectionRecreateEventListener.class );
	public static final EventType<PostCollectionRemoveEventListener> POST_COLLECTION_REMOVE
			= new EventType<PostCollectionRemoveEventListener>( "post-collection-remove", PostCollectionRemoveEventListener.class );
	public static final EventType<PostCollectionUpdateEventListener> POST_COLLECTION_UPDATE
			= new EventType<PostCollectionUpdateEventListener>( "post-collection-update", PostCollectionUpdateEventListener.class );


	/**
	 * Maintain a map of {@link EventType} instances keyed by name for lookup by name as well as {@link #values()}
	 * resolution.
	 */
	public static final Map<String,EventType> eventTypeByNameMap = AccessController.doPrivileged(
			new PrivilegedAction<Map() {
				@Override
				public Map<String, EventType> run() {
					final Map<String, EventType> typeByNameMap = new HashMap();
					final Field[] fields = EventType.class.getDeclaredFields();
					for ( int i = 0, max = fields.length; i < max; i++ ) {
						if ( EventType.class.isAssignableFrom( fields[i].getType() ) ) {
							try {
								final EventType typeField = ( EventType ) fields[i].get( null );
								typeByNameMap.put( typeField.eventName(), typeField );
							}
							catch( Exception t ) {
								throw new HibernateException( "Unable to initialize EventType map", t );
							}
						}
					}
					return typeByNameMap;
				}
			}
	);

	/**
	 * Find an {@link EventType} by its name
	 *
	 * @param eventName The name
	 *
	 * @return The {@link EventType} instance.
	 *
	 * @throws HibernateException If eventName is null, or if eventName does not correlate to any known event type.
	 */
	public static EventType resolveEventTypeByName(final String eventName) {
		if ( eventName == null ) {
			throw new HibernateException( "event name to resolve cannot be null" );
		}
		final EventType eventType = eventTypeByNameMap.get( eventName );
		if ( eventType == null ) {
			throw new HibernateException( "Unable to locate proper event type for event name [" + eventName + "]" );
		}
		return eventType;
	}

	/**
	 * Get a collection of all {@link EventType} instances.
	 *
	 * @return All {@link EventType} instances
	 */
	public static Collection<EventType> values() {
		return eventTypeByNameMap.values();
	}


	private final String eventName;
	private final Class<? extends T> baseListenerInterface;

	private EventType(String eventName, Class<? extends T> baseListenerInterface) {
		this.eventName = eventName;
		this.baseListenerInterface = baseListenerInterface;
	}

	public String eventName() {
		return eventName;
	}

	public Class baseListenerInterface() {
		return baseListenerInterface;
	}

	@Override
	public String toString() {
		return eventName();
	}
}

Other Hibernate examples (source code examples)

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