001    /**
002     * Copyright 2005-2012 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.kew.role;
017    
018    import org.kuali.rice.kew.engine.RouteContext;
019    
020    import java.util.Collections;
021    import java.util.HashMap;
022    import java.util.List;
023    import java.util.Map;
024    
025    /**
026     * Implementation of the Null Object Pattern for QualiferResolvers.  Returns an List with a single empty
027     * Map<String, String> when asked to resolve.
028     * 
029     * @author Kuali Rice Team (rice.collab@kuali.org)
030     *
031     */
032    public class NullQualifierResolver implements QualifierResolver {
033    
034            public List<Map<String, String>> resolve(RouteContext context) {
035                    return Collections.<Map<String, String>>singletonList(new HashMap<String, String>());
036            }
037    
038    }