/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kew.engine.node;

 import org.kuali.rice.kew.engine.RouteContext;

 /**

  * The JoinEngine is responsible for maintaining join state and determining when the join condition

  * has been satisfied.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public interface JoinEngine {

     public void addExpectedJoiner(RouteNodeInstance nodeInstance, Branch branch);

     public void addActualJoiner(RouteNodeInstance nodeInstance, Branch branch);

     public boolean isJoined(RouteNodeInstance nodeInstance);

     public void createExpectedJoinState(RouteContext context, RouteNodeInstance joinInstance, RouteNodeInstance previousNodeInstance);

 }