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  package org.apache.cayenne.map.event;
  
  import org.apache.cayenne.map.Entity;
  import org.apache.cayenne.map.Relationship;
  
  /** 
   * Represents events resulted from Relationship changes 
   * in CayenneModeler. This event is used for both ObjRelationships
   * and DbRelationships.
   * 
   * 
   */
  public class RelationshipEvent extends EntityEvent {
  	protected Relationship<?,?,?> relationship;
  
  	/** Creates a Relationship change event. */
  	public RelationshipEvent(Object src, Relationship<?,?,?> rel, Entity<?,?,?> entity) {
  		super(src, entity);
  		setRelationship(rel);
  	}
  
  	/** Creates a Relationship event of a specified type. */
  	public RelationshipEvent(
  		Object src,
  		Relationship<?,?,?> rel,
  		Entity<?,?,?> entity,
  		int id) {
  
  		this(src, rel, entity);
  		setId(id);
  	}
  
  	/** Creates a Relationship name change event. */
  	public RelationshipEvent(
  		Object src,
  		Relationship<?,?,?> rel,
  		Entity<?,?,?> entity,
  		String oldName) {
  			
  		this(src, rel, entity);
          setOldName(oldName);
  	}
  
  	/** Returns relationship associated with this event. */
  	public Relationship<?,?,?> getRelationship() {
  		return relationship;
  	}
  
  	/**
  	 * Sets relationship associated with this event.
  	 * 
  	 * @param relationship The relationship to set
  	 */
  	public void setRelationship(Relationship<?,?,?> relationship) {
  		this.relationship = relationship;
  	}
  	
  	@Override
      public String getNewName() {
  		return (relationship != null) ? relationship.getName() : null;
  	}
  }
  