/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (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.<p>
*
* @since 8.0.0
*/
public class CmsLockInfo implements IsSerializable {
/**
* An enum indicating the success or type of failure of a locking operation.<p>
*/
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.<p>
*
* @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.<p>
*/
protected CmsLockInfo() {
// do nothing
}
/**
* Creates a new info bean for a resource which has changed since it was opened.<p>
*
* @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.<p>
*
* @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.<p>
*
* @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.<p>
*
* @return the new lock info bean
*/
public static CmsLockInfo forSuccess() {
return new CmsLockInfo(State.success, null, null);
}
/**
* Returns true if the locking succeeded.<p>
*
* @return true if the locking succeeded
*/
public boolean couldLock() {
return m_state == State.success;
}
/**
* Returns the additional error message.<p>
*
* @return the additional error message
*/
public String getErrorMessage() {
return m_exceptionMessage;
}
/**
* Returns the state of the locking operation.<p>
*
* @return the state of the locking operation
*/
public State getState() {
return m_state;
}
/**
* Returns the user name.<p>
*
* @return a user name
*/
public String getUser() {
return m_user;
}
}