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.Fields; 024 import cascading.tuple.TupleEntry; 025 import cascading.tuple.TupleEntryCollector; 026 027 /** Interface FunctionCall provides access to the current {@link Function} invocation arguments. */ 028 public interface FunctionCall<C> extends OperationCall<C> 029 { 030 /** 031 * Returns {@link TupleEntry} of argument values. 032 * 033 * @return TupleEntry 034 */ 035 TupleEntry getArguments(); 036 037 /** 038 * Return the resolved {@link Fields} declared by the current {@link Operation}. 039 * 040 * @return Fields 041 */ 042 Fields getDeclaredFields(); 043 044 /** 045 * Returns the {@link cascading.tuple.TupleEntryCollector} used to emit result values. 046 * 047 * @return TupleCollector 048 */ 049 TupleEntryCollector getOutputCollector(); 050 }