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OpenCms is an enterprise-ready, easy to use website content management system based on Java and XML technology. Offering a complete set of features, OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

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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.ade.configuration;

import java.util.List;

import com.google.common.base.Optional;

/**
 * Represents a sequence of inherited module/sitemap configurations, together with an index into that list.

* * Used for computing the configuration inheritance. * */ public class CmsADEConfigurationSequence { /** The list of configuration data. */ private List m_configDatas; /** The index for the current configuration. */ private int m_configIndex; /** * Creates a new instance for the given list of configuration data, with the index pointing to the last element.

* * @param configDatas the config data list */ public CmsADEConfigurationSequence(List configDatas) { this(configDatas, configDatas.size() - 1); } /** * Creates a new instance.

* * @param configDatas the configuration data list * @param index the index into the list */ protected CmsADEConfigurationSequence(List configDatas, int index) { assert(0 <= index) && (index < configDatas.size()); m_configDatas = configDatas; m_configIndex = index; } /** * Gets the current configuration data.

* * @return the current configuration data */ public CmsADEConfigDataInternal getConfig() { return m_configDatas.get(m_configIndex); } /** * Returns a sequence which only differs from this instance in that its index is one less.

* * However, if the index of this instance is already 0, Optional.absent will be returned. * * @return the parent sequence, or Optional.absent if we are already at the start of the sequence */ public Optional getParent() { if (m_configIndex <= 0) { return Optional.absent(); } return Optional.fromNullable(new CmsADEConfigurationSequence(m_configDatas, m_configIndex - 1)); } }





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