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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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;

import java.io.Serializable;

import org.hibernate.pretty.MessageHelper;

/**
 * Thrown when Hibernate could not resolve an object by id, especially when
 * loading an association.
 *
 * @author Gavin King
 */
public class UnresolvableObjectException extends HibernateException {

        private final Serializable identifier;
        private final String entityName;

        public UnresolvableObjectException(Serializable identifier, String clazz) {
                this("No row with the given identifier exists", identifier, clazz);
        }
        UnresolvableObjectException(String message, Serializable identifier, String clazz) {
                super(message);
                this.identifier = identifier;
                this.entityName = clazz;
        }
        public Serializable getIdentifier() {
                return identifier;
        }

        public String getMessage() {
                return super.getMessage() + ": " +
                        MessageHelper.infoString(entityName, identifier);
        }

        public String getEntityName() {
                return entityName;
        }

        public static void throwIfNull(Object o, Serializable id, String clazz)
        throws UnresolvableObjectException {
                if (o==null) throw new UnresolvableObjectException(id, clazz);
        }

}