001    /*
002     * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved.
003     *
004     * Project and contact information: http://www.cascading.org/
005     *
006     * This file is part of the Cascading project.
007     *
008     * Licensed under the Apache License, Version 2.0 (the "License");
009     * you may not use this file except in compliance with the License.
010     * You may obtain a copy of the License at
011     *
012     *     http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing, software
015     * distributed under the License is distributed on an "AS IS" BASIS,
016     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017     * See the License for the specific language governing permissions and
018     * limitations under the License.
019     */
020    
021    package cascading.pipe;
022    
023    import java.util.Map;
024    
025    import cascading.flow.FlowElement;
026    import cascading.tuple.Fields;
027    
028    /**
029     *
030     */
031    public interface Group extends FlowElement
032      {
033      String getName();
034    
035      boolean isGroupBy();
036    
037      boolean isCoGroup();
038    
039      boolean isSortReversed();
040    
041      boolean isSorted();
042    
043      Map<String, Fields> getKeySelectors();
044    
045      Map<String, Fields> getSortingSelectors();
046      }