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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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   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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  package org.apache.cayenne.map.event;
  
  import org.apache.cayenne.map.Attribute;
  import org.apache.cayenne.map.Entity;
  
  /** 
   * Represents events resulted from Attribute changes 
   * in CayenneModeler. This event is used for both ObjAttributes
   * and DbAttributes.
   * 
   */
  public class AttributeEvent extends EntityEvent {
      protected Attribute<?,?,?> attribute;
  
      /** Creates a Attribute change event. */
      public AttributeEvent(Object src, Attribute<?,?,?> attr, Entity<?,?,?> entity) {
          super(src, entity);
          setAttribute(attr);
      }
  
      /** Creates a Attribute event of a specified type. */
      public AttributeEvent(Object src, Attribute<?,?,?> attr, Entity<?,?,?> entity, int id) {
          this(src, attr, entity);
          setId(id);
      }
  
      /** Creates a Attribute name change event.*/
      public AttributeEvent(Object src, Attribute<?,?,?> attr, Entity<?,?,?> entity, String oldName) {
  
          this(src, attr, entity);
          setOldName(oldName);
      }
  
      /** Get attribute (obj or db). */
      public Attribute<?,?,?> getAttribute() {
          return attribute;
      }
  
      /**
       * Sets the attribute.
       * @param attribute The attribute to set
       */
      public void setAttribute(Attribute<?,?,?> attribute) {
          this.attribute = attribute;
      }
  
      @Override
      public String getNewName() {
          return (attribute != null) ? attribute.getName() : null;
      }
  }
  