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   *  or more contributor license agreements.  See the NOTICE file
   *  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 javax.swing.undo.CannotRedoException;
  import javax.swing.undo.CannotUndoException;
  
  import org.apache.cayenne.configuration.DataChannelDescriptor;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.map.DbRelationship;
  import org.apache.cayenne.map.ObjEntity;
  import org.apache.cayenne.map.ObjRelationship;
  import org.apache.cayenne.modeler.action.CreateRelationshipAction;
  import org.apache.cayenne.modeler.action.RemoveRelationshipAction;
  import org.apache.cayenne.modeler.event.EntityDisplayEvent;
  
  public class CreateRelationshipUndoableEdit extends CayenneUndoableEdit {
  
      private ObjEntity objEnt;
      private ObjRelationship[] objectRel;
  
      private DbEntity dbEnt;
      private DbRelationship[] dbRel;
  
      public CreateRelationshipUndoableEdit(ObjEntity objEnt, ObjRelationship[] objectRel) {
          this.objEnt = objEnt;
          this.objectRel = objectRel;
      }
  
      public CreateRelationshipUndoableEdit(DbEntity dbEnt, DbRelationship[] dbRel) {
          this.dbEnt = dbEnt;
          this.dbRel = dbRel;
      }
  
      @Override
      public String getPresentationName() {
          return "Create Relationship";
      }
  
      @Override
      public void redo() throws CannotRedoException {
          CreateRelationshipAction action = actionManager
                  .getAction(CreateRelationshipAction.class);
  
          if (objEnt != null) {
              for (ObjRelationship rel : objectRel) {
                  action.createObjRelationship(objEnt, rel);
              }
          }
  
          if (dbEnt != null) {
              for (DbRelationship rel : dbRel) {
                  action.createDbRelationship(dbEnt, rel);
              }
          }
      }
  
      @Override
      public void undo() throws CannotUndoException {
          RemoveRelationshipAction action = actionManager
                  .getAction(RemoveRelationshipAction.class);
  
          if (objEnt != null) {
              action.removeObjRelationships(objEnt, objectRel);
              controller.fireObjEntityDisplayEvent(new EntityDisplayEvent(
                      this,
                      objEnt,
                      objEnt.getDataMap(),
                      (DataChannelDescriptor) controller.getProject().getRootNode()));
          }
  
          if (dbEnt != null) {
              action.removeDbRelationships(dbEnt, dbRel);
              controller.fireDbEntityDisplayEvent(new EntityDisplayEvent(this, dbEnt, dbEnt
                      .getDataMap(), (DataChannelDescriptor) controller
                      .getProject()
                      .getRootNode()));
          }
      }
  }
  