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   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
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   *
   *    https://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.cayenne.modeler.undo;
  
  import org.apache.cayenne.configuration.DataNodeDescriptor;
  import org.apache.cayenne.configuration.event.DataNodeEvent;
  import org.apache.cayenne.map.DataMap;
  import org.apache.cayenne.modeler.ProjectController;
  import org.apache.cayenne.modeler.action.LinkDataMapAction;
  
  import javax.swing.undo.CannotRedoException;
  import javax.swing.undo.CannotUndoException;
  import java.util.Collection;
  
  public class LinkDataMapUndoableEdit extends CayenneUndoableEdit {
  
      DataMap map;
      DataNodeDescriptor node;
      Collection<DataNodeDescriptor> unlinkedNodes;
      ProjectController mediator;
  
      @Override
      public String getPresentationName() {
          return "Link unlinked DataMaps";
      }
  
      public LinkDataMapUndoableEdit(DataMap map, DataNodeDescriptor node, Collection<DataNodeDescriptor> unlinkedNodes, ProjectController mediator) {
          this.map = map;
          this.node = node;
          this.unlinkedNodes = unlinkedNodes;
          this.mediator = mediator;
      }
  
      @Override
      public void redo() throws CannotRedoException {
          LinkDataMapAction action = actionManager.getAction(LinkDataMapAction.class);
          action.linkDataMap(map, node);
      }
  
      @Override
      public void undo() throws CannotUndoException {
          if (node != null) {
              node.getDataMapNames().remove(map.getName());
              mediator.fireDataNodeEvent(new DataNodeEvent(this, node));
          }
  
          if (!unlinkedNodes.isEmpty()) {
              for (DataNodeDescriptor unlinkedNode : unlinkedNodes) {
                  unlinkedNode.getDataMapNames().add(map.getName());
                  mediator.fireDataNodeEvent(new DataNodeEvent(this, unlinkedNode));
              }
          }
      }
  
  }
  