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Hibernate example source code file (LoadEventListener.java)

This example Hibernate source code file (LoadEventListener.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

get, get, hibernateexception, immediate_load, internal_load_eager, internal_load_lazy, internal_load_nullable, internal_load_nullable, io, load, loadtype, loadtype, serializable, string, string

The Hibernate LoadEventListener.java source code

/*
 * 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.event.spi;

import java.io.Serializable;

import org.hibernate.HibernateException;

/**
 * Defines the contract for handling of load events generated from a session.
 *
 * @author Steve Ebersole
 */
public interface LoadEventListener extends Serializable {

	/** 
	 * Handle the given load event.
     *
     * @param event The load event to be handled.
     * @return The result (i.e., the loaded entity).
     * @throws HibernateException
     */
	public void onLoad(LoadEvent event, LoadType loadType) throws HibernateException;

	public static final LoadType RELOAD = new LoadType("GET")
			.setAllowNulls(false)
			.setAllowProxyCreation(false)
			.setCheckDeleted(true)
			.setNakedEntityReturned(false);

	public static final LoadType GET = new LoadType("GET")
			.setAllowNulls(true)
			.setAllowProxyCreation(false)
			.setCheckDeleted(true)
			.setNakedEntityReturned(false);
	
	public static final LoadType LOAD = new LoadType("LOAD")
			.setAllowNulls(false)
			.setAllowProxyCreation(true)
			.setCheckDeleted(true)
			.setNakedEntityReturned(false);
	
	public static final LoadType IMMEDIATE_LOAD = new LoadType("IMMEDIATE_LOAD")
			.setAllowNulls(true)
			.setAllowProxyCreation(false)
			.setCheckDeleted(false)
			.setNakedEntityReturned(true);
	
	public static final LoadType INTERNAL_LOAD_EAGER = new LoadType("INTERNAL_LOAD_EAGER")
			.setAllowNulls(false)
			.setAllowProxyCreation(false)
			.setCheckDeleted(false)
			.setNakedEntityReturned(false);
	
	public static final LoadType INTERNAL_LOAD_LAZY = new LoadType("INTERNAL_LOAD_LAZY")
			.setAllowNulls(false)
			.setAllowProxyCreation(true)
			.setCheckDeleted(false)
			.setNakedEntityReturned(false);
	
	public static final LoadType INTERNAL_LOAD_NULLABLE = new LoadType("INTERNAL_LOAD_NULLABLE")
			.setAllowNulls(true)
			.setAllowProxyCreation(false)
			.setCheckDeleted(false)
			.setNakedEntityReturned(false);

	public static final class LoadType {
		private String name;

		private boolean nakedEntityReturned;
		private boolean allowNulls;
		private boolean checkDeleted;
		private boolean allowProxyCreation;

        private LoadType(String name) {
	        this.name = name;
        }

		public boolean isAllowNulls() {
			return allowNulls;
		}

		private LoadType setAllowNulls(boolean allowNulls) {
			this.allowNulls = allowNulls;
			return this;
		}

		public boolean isNakedEntityReturned() {
			return nakedEntityReturned;
		}

		private LoadType setNakedEntityReturned(boolean immediateLoad) {
			this.nakedEntityReturned = immediateLoad;
			return this;
		}

		public boolean isCheckDeleted() {
			return checkDeleted;
		}

		private LoadType setCheckDeleted(boolean checkDeleted) {
			this.checkDeleted = checkDeleted;
			return this;
		}

		public boolean isAllowProxyCreation() {
			return allowProxyCreation;
		}

		private LoadType setAllowProxyCreation(boolean allowProxyCreation) {
			this.allowProxyCreation = allowProxyCreation;
			return this;
		}

		public String getName() {
			return name;
		}
		
		public String toString() {
			return name;
		}
	}
}

Other Hibernate examples (source code examples)

Here is a short list of links related to this Hibernate LoadEventListener.java source code file:

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