001/* 002 * Copyright (c) 2007-2015 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.flow.stream.element; 022 023import cascading.CascadingException; 024import cascading.flow.FlowProcess; 025import cascading.flow.stream.duct.Duct; 026import cascading.operation.ValueAssertion; 027import cascading.pipe.Each; 028import cascading.pipe.OperatorException; 029import cascading.tuple.Fields; 030import cascading.tuple.TupleEntry; 031 032/** 033 * 034 */ 035public class ValueAssertionEachStage extends EachStage 036 { 037 private ValueAssertion valueAssertion; 038 039 public ValueAssertionEachStage( FlowProcess flowProcess, Each each ) 040 { 041 super( flowProcess, each ); 042 } 043 044 @Override 045 protected Fields getIncomingPassThroughFields() 046 { 047 return incomingScopes.get( 0 ).getIncomingFunctionPassThroughFields(); 048 } 049 050 @Override 051 protected Fields getIncomingArgumentsFields() 052 { 053 return incomingScopes.get( 0 ).getIncomingFunctionArgumentFields(); 054 } 055 056 @Override 057 public void initialize() 058 { 059 super.initialize(); 060 061 valueAssertion = each.getValueAssertion(); 062 } 063 064 @Override 065 public void receive( Duct previous, TupleEntry incomingEntry ) 066 { 067 argumentsEntry.setTuple( argumentsBuilder.makeResult( incomingEntry.getTuple(), null ) ); 068 069 try 070 { 071 valueAssertion.doAssert( flowProcess, operationCall ); 072 073 next.receive( this, incomingEntry ); 074 } 075 catch( CascadingException exception ) 076 { 077 handleException( exception, argumentsEntry ); 078 } 079 catch( Throwable throwable ) 080 { 081 handleException( new OperatorException( each, "operator Each failed executing operation", throwable ), argumentsEntry ); 082 } 083 } 084 }