    001/*
    002 * Copyright (c) 2016 Chris K Wensel <chris@wensel.net>. All Rights Reserved.
    003 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
    004 *
    005 * Project and contact information: http://www.cascading.org/
    006 *
    007 * This file is part of the Cascading project.
    008 *
    009 * Licensed under the Apache License, Version 2.0 (the "License");
    010 * you may not use this file except in compliance with the License.
    011 * You may obtain a copy of the License at
    012 *
    013 *     http://www.apache.org/licenses/LICENSE-2.0
    014 *
    015 * Unless required by applicable law or agreed to in writing, software
    016 * distributed under the License is distributed on an "AS IS" BASIS,
    017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    018 * See the License for the specific language governing permissions and
    019 * limitations under the License.
    020 */
    021
    022package cascading.flow.stream.element;
    023
    024import cascading.CascadingException;
    025import cascading.flow.FlowProcess;
    026import cascading.flow.stream.duct.Duct;
    027import cascading.operation.ValueAssertion;
    028import cascading.pipe.Each;
    029import cascading.pipe.OperatorException;
    030import cascading.tuple.Fields;
    031import cascading.tuple.TupleEntry;
    032
    033/**
    034 *
    035 */
    036public class ValueAssertionEachStage extends EachStage
    037  {
    038  private ValueAssertion valueAssertion;
    039
    040  public ValueAssertionEachStage( FlowProcess flowProcess, Each each )
    041    {
    042    super( flowProcess, each );
    043    }
    044
    045  @Override
    046  protected Fields getIncomingPassThroughFields()
    047    {
    048    return incomingScopes.get( 0 ).getIncomingFunctionPassThroughFields();
    049    }
    050
    051  @Override
    052  protected Fields getIncomingArgumentsFields()
    053    {
    054    return incomingScopes.get( 0 ).getIncomingFunctionArgumentFields();
    055    }
    056
    057  @Override
    058  public void initialize()
    059    {
    060    super.initialize();
    061
    062    valueAssertion = each.getValueAssertion();
    063    }
    064
    065  @Override
    066  public void receive( Duct previous, int ordinal, TupleEntry incomingEntry )
    067    {
    068    argumentsEntry.setTuple( argumentsBuilder.makeResult( incomingEntry.getTuple(), null ) );
    069
    070    try
    071      {
    072      valueAssertion.doAssert( flowProcess, operationCall );
    073
    074      next.receive( this, 0, incomingEntry );
    075      }
    076    catch( CascadingException exception )
    077      {
    078      handleException( exception, argumentsEntry );
    079      }
    080    catch( Throwable throwable )
    081      {
    082      handleException( new OperatorException( each, "operator Each failed executing operation", throwable ), argumentsEntry );
    083      }
    084    }
    085  }