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.assertion; 022 023 import java.beans.ConstructorProperties; 024 025 import cascading.flow.FlowProcess; 026 import cascading.management.annotation.Property; 027 import cascading.management.annotation.PropertyDescription; 028 import cascading.management.annotation.Visibility; 029 import cascading.operation.ValueAssertion; 030 import cascading.operation.ValueAssertionCall; 031 import cascading.tuple.TupleEntry; 032 033 /** 034 * Class AssertSizeEquals asserts that the current {@link cascading.tuple.Tuple} in the stream is exactly the given size. 035 * </p> 036 * On evaluation, {@link cascading.tuple.Tuple#size()} is called (note Tuples may hold {@code null} values). 037 */ 038 public class AssertSizeEquals extends BaseAssertion implements ValueAssertion 039 { 040 /** Field size */ 041 private final int size; 042 043 /** 044 * Constructor AssertSizeEquals creates a new AssertSizeEquals instance. 045 * 046 * @param size of type int 047 */ 048 @ConstructorProperties({"size"}) 049 public AssertSizeEquals( int size ) 050 { 051 super( "tuple size %s, is not equal to: %s, in tuple: %s" ); 052 this.size = size; 053 } 054 055 @Property(name = "size", visibility = Visibility.PRIVATE) 056 @PropertyDescription("The expected tuple size.") 057 public int getSize() 058 { 059 return size; 060 } 061 062 @Override 063 public void doAssert( FlowProcess flowProcess, ValueAssertionCall assertionCall ) 064 { 065 TupleEntry input = assertionCall.getArguments(); 066 067 if( input.size() != size ) 068 fail( input.size(), size, input.getTuple().print() ); 069 } 070 071 @Override 072 public boolean equals( Object object ) 073 { 074 if( this == object ) 075 return true; 076 if( !( object instanceof AssertSizeEquals ) ) 077 return false; 078 if( !super.equals( object ) ) 079 return false; 080 081 AssertSizeEquals that = (AssertSizeEquals) object; 082 083 if( size != that.size ) 084 return false; 085 086 return true; 087 } 088 089 @Override 090 public int hashCode() 091 { 092 int result = super.hashCode(); 093 result = 31 * result + size; 094 return result; 095 } 096 }