    001/*
    002 * Copyright (c) 2007-2017 Xplenty, 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.flow.planner.iso.expression;
    022
    023import cascading.flow.FlowElement;
    024import cascading.operation.Operation;
    025import cascading.pipe.Operator;
    026
    027/**
    028 *
    029 */
    030public class OperationExpression extends TypeExpression<Operation>
    031  {
    032  public OperationExpression( ElementCapture capture, boolean exact, Class<? extends Operation> type )
    033    {
    034    super( capture, exact, type );
    035    }
    036
    037  public OperationExpression( ElementCapture capture, Class<? extends Operation> type )
    038    {
    039    super( capture, type );
    040    }
    041
    042  public OperationExpression( boolean exact, Class<? extends Operation> type )
    043    {
    044    super( exact, type );
    045    }
    046
    047  public OperationExpression( Class<? extends Operation> type )
    048    {
    049    super( type );
    050    }
    051
    052  @Override
    053  protected Class<? extends Operation> getType( FlowElement flowElement )
    054    {
    055    if( !( flowElement instanceof Operator ) )
    056      return null;
    057
    058    return ( (Operator) flowElement ).getOperation().getClass();
    059    }
    060  }