001    /*
002     * Copyright (c) 2007-2014 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.operation;
022    
023    import cascading.tuple.TupleEntry;
024    
025    /**
026     * Interface GroupAssertionCall provides access to the current {@link GroupAssertion} invocation arguments.
027     * <p/>
028     * This interface is generic, allowing the user to set a custom 'context' object when {@link GroupAssertion#start(cascading.flow.FlowProcess, GroupAssertionCall)}
029     * is called. The {@link OperationCall#setContext(Object)} and {@link OperationCall#getContext()} methods are
030     * inherited from {@link OperationCall}.
031     *
032     * @see GroupAssertion
033     * @see OperationCall
034     */
035    public interface GroupAssertionCall<C> extends OperationCall<C>
036      {
037      /**
038       * Returns the current grouping {@link TupleEntry}.
039       *
040       * @return TupleEntry
041       */
042      TupleEntry getGroup();
043    
044      /**
045       * Returns {@link TupleEntry} of argument values.
046       *
047       * @return TupleEntry
048       */
049      TupleEntry getArguments();
050      }