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The Java Persistence API (JPA) : a standard interface-based Java model abstraction of persistence, developed by the JCP.

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/*
 * Copyright (c) 2008, 2009, 2011 Oracle, Inc. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.  The Eclipse Public License is available
 * at http://www.eclipse.org/legal/epl-v10.html and the Eclipse Distribution License
 * is available at http://www.eclipse.org/org/documents/edl-v10.php.
 */
package javax.persistence;

/**
 * Thrown by the persistence provider when an pessimistic locking conflict
 * occurs. This exception may be thrown as part of an API call, a flush or at
 * commit time. The current transaction, if one is active, will be marked for
 * rollback.
 *
 * @since Java Persistence 2.0
 */
public class PessimisticLockException extends PersistenceException {

    private static final long serialVersionUID = -7793076885622917367L;

    /**
	 * The object that caused the exception
	 */
	Object entity;

	/**
	 * Constructs a new PessimisticLockException exception
	 * with null as its detail message.
	 */
	public PessimisticLockException() {
		super();
	}

	/**
	 * Constructs a new PessimisticLockException exception
	 * with the specified detail message.
	 *
	 * @param message the detail message.
	 */
	public PessimisticLockException(String message) {
		super( message );
	}

	/**
	 * Constructs a new PessimisticLockException exception
	 * with the specified detail message and cause.
	 *
	 * @param message the detail message.
	 * @param cause the cause.
	 */
	public PessimisticLockException(String message, Throwable cause) {
		super( message, cause );
	}

	/**
	 * Constructs a new PessimisticLockException exception
	 * with the specified cause.
	 *
	 * @param cause the cause.
	 */
	public PessimisticLockException(Throwable cause) {
		super( cause );
	}

	/**
	 * Constructs a new PessimisticLockException exception
	 * with the specified entity.
	 *
	 * @param entity the entity.
	 */
	public PessimisticLockException(Object entity) {
		this.entity = entity;
	}

	/**
	 * Constructs a new PessimisticLockException exception
	 * with the specified detail message, cause, and entity.
	 *
	 * @param message the detail message.
	 * @param cause the cause.
	 * @param entity the entity.
	 */
	public PessimisticLockException(String message, Throwable cause, Object entity) {
		super( message, cause );
		this.entity = entity;
	}

	/**
	 * Returns the entity that caused this exception.
	 *
	 * @return the entity.
	 */
	public Object getEntity() {
		return this.entity;
	}
}