001/*
002 * Copyright (c) 2007-2016 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
021package cascading.pipe;
022
023import java.util.Map;
024
025import cascading.flow.FlowElement;
026import cascading.tuple.Fields;
027
028/**
029 *
030 */
031public 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  }