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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 that does not result in transaction rollback. This
 * exception may be thrown as part of an API call, at, flush or at
 * commit time. The current transaction, if one is active, will be not
 * be marked for rollback.
 *
 * @since Java Persistence 2.0
 */
public class LockTimeoutException extends PersistenceException {

    private static final long serialVersionUID = -8272682194621776258L;

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

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

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

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

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

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

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

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