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.operation.assertion; 022 023import cascading.flow.FlowProcess; 024import cascading.operation.ValueAssertion; 025import cascading.operation.ValueAssertionCall; 026import cascading.tuple.Tuple; 027import cascading.tuple.TupleEntry; 028 029/** Class AssertNull asserts that every value in the argument values {@link Tuple} is a null value. */ 030public class AssertNull extends BaseAssertion implements ValueAssertion 031 { 032 /** Constructor AssertNull creates a new AssertNull instance. */ 033 public AssertNull() 034 { 035 super( "argument '%s' value was not null, in tuple: %s" ); 036 } 037 038 @Override 039 public void doAssert( FlowProcess flowProcess, ValueAssertionCall assertionCall ) 040 { 041 TupleEntry input = assertionCall.getArguments(); 042 int pos = 0; 043 044 for( Object value : input.getTuple() ) 045 { 046 if( value != null ) 047 fail( input.getFields().get( pos ), input.getTuple().print() ); 048 049 pos++; 050 } 051 } 052 }