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/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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.
 *
 * For further information about Alkacon Software, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.gwt.shared;

import com.google.gwt.user.client.rpc.IsSerializable;

/**
 * A bean for storing information about whether a resource could be locked or not, and if not, why.

* * @since 8.0.0 */ public class CmsLockInfo implements IsSerializable { /** * An enum indicating the success or type of failure of a locking operation.

*/ public enum State { /** The resource was already locked by another user. */ locked, /** The resource has changed in the meantime. */ changed, /** The resource was successfully locked. */ success, /** Some other error occurred. */ other; } /** The state indicating whether (and how) the locking operation succeeded or failed. */ private State m_state; /** A user name. */ private String m_user; /** An additional error message. */ private String m_exceptionMessage; /** * Creates a new lock info bean.

* * @param state the state of the locking operation * @param user a user name * @param exceptionMessage an additional error message */ public CmsLockInfo(State state, String user, String exceptionMessage) { m_state = state; m_user = user; m_exceptionMessage = exceptionMessage; } /** * Empty constructor for serialization.

*/ protected CmsLockInfo() { // do nothing } /** * Creates a new info bean for a resource which has changed since it was opened.

* * @param user the user by which it was changed * @return the new lock info bean */ public static CmsLockInfo forChangedResource(String user) { return new CmsLockInfo(State.changed, user, null); } /** * Creates a new info bean for other types of errors.

* * @param errorMessage the additional error message * * @return the new lock info bean */ public static CmsLockInfo forError(String errorMessage) { return new CmsLockInfo(State.other, null, errorMessage); } /** * Returns a lock info bean for a resource locked by another user.

* * @param lockUser the other user * * @return the new lock info bean */ public static CmsLockInfo forLockedResource(String lockUser) { return new CmsLockInfo(State.locked, lockUser, null); } /** * Returns a lock info bean for a successful lock operation.

* * @return the new lock info bean */ public static CmsLockInfo forSuccess() { return new CmsLockInfo(State.success, null, null); } /** * Returns true if the locking succeeded.

* * @return true if the locking succeeded */ public boolean couldLock() { return m_state == State.success; } /** * Returns the additional error message.

* * @return the additional error message */ public String getErrorMessage() { return m_exceptionMessage; } /** * Returns the state of the locking operation.

* * @return the state of the locking operation */ public State getState() { return m_state; } /** * Returns the user name.

* * @return a user name */ public String getUser() { return m_user; } }





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