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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 javax.swing.undo.CannotRedoException;
  import javax.swing.undo.CannotUndoException;
  
  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;
  
  public class RemoveRelationshipUndoableEdit extends BaseRemovePropertyUndoableEdit {
  
      private ObjRelationship[] rels;
      private DbRelationship[] dbRels;
  
      public RemoveRelationshipUndoableEdit(ObjEntity objEntity, ObjRelationship[] rels) {
          super();
          this.objEntity = objEntity;
          this.rels = rels;
      }
  
      public RemoveRelationshipUndoableEdit(DbEntity dbEntity, DbRelationship[] dbRels) {
          super();
          this.dbEntity = dbEntity;
          this.dbRels = dbRels;
      }
  
      @Override
      public String getPresentationName() {
          if (objEntity != null) {
              return "Remove Obj Relationship";
          } else {
              return "Remove Db Relationship";
          }
      }
  
      @Override
      public void redo() throws CannotRedoException {
          RemoveRelationshipAction action = actionManager.getAction(RemoveRelationshipAction.class);
          if (objEntity != null) {
              action.removeObjRelationships(objEntity, rels);
              focusObjEntity();
          } else {
              action.removeDbRelationships(dbEntity, dbRels);
              focusDBEntity();
          }
      }
  
      @Override
      public void undo() throws CannotUndoException {
          CreateRelationshipAction action = actionManager.getAction(CreateRelationshipAction.class);
          if (objEntity != null) {
              for (ObjRelationship r : rels) {
                  action.createObjRelationship(objEntity, r);
              }
              focusObjEntity();
          } else {
              for (DbRelationship dr : dbRels) {
                  action.createDbRelationship(dbEntity, dr);
              }
              focusDBEntity();
          }
      }
  }
  