/**
    * This file Copyright (c) 2011-2013 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.delta;
  
  import info.magnolia.jcr.predicate.NodeTypePredicate;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.module.InstallContext;
  import info.magnolia.repository.RepositoryConstants;
  
  import java.util.Iterator;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  /**
   * Renames all nodes having a certain name and nodeType to the provided new name.
   */
  public class RenameNodesTask extends AbstractRepositoryTask {
      private final String workspace;
      private final String path;
      private final String oldName;
      private final String newName;
      private final String nodeType;
  
      public RenameNodesTask(String name, String workspace, String path, String oldName, String newName, String nodeType) {
          this(name, String.format("Rename all nodes of type '%s' under path '%s:%s' from '%s' to '%s'.", nodeType, workspace, path, oldName, newName),
                  RepositoryConstants.CONFIG, path, oldName, newName, nodeType);
      }
  
      public RenameNodesTask(String name, String description, String workspace, String path, String oldName,
              String newName, String nodeType) {
          super(name, description);
          this.workspace = workspace;
          this.path = path;
          this.oldName = oldName;
          this.newName = newName;
          this.nodeType = nodeType;
      }
  
      @Override
      protected void doExecute(InstallContext installContext) throws RepositoryException, TaskExecutionException {
          final Session session = installContext.getJCRSession(workspace);
          final Node rootOfOperation = session.getNode(path);
          Iterator<Node> iterator = NodeUtil.collectAllChildren(rootOfOperation, new NodeTypePredicate(nodeType)).iterator();
          while (iterator.hasNext()) {
              Node childNode = iterator.next();
              if (oldName.equals(childNode.getName())) {
                  NodeUtil.renameNode(childNode, newName);
              }
          }
      }
  }