/*

  * Copyright 2007-2009 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.role;

 import java.util.Collections;

 import java.util.List;

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

 import org.kuali.rice.kim.bo.types.dto.AttributeSet;

 /**

  * Implementation of the Null Object Pattern for QualiferResolvers.  Returns an List with a single empty

  * AttributeSet when asked to resolve. 

  * 

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

  *

  */

 public class NullQualifierResolver implements QualifierResolver {

         public List<AttributeSet> resolve(RouteContext context) {

                 return Collections.singletonList(new AttributeSet());

         }

 }