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; 022 023 import java.beans.ConstructorProperties; 024 025 import cascading.flow.FlowProcess; 026 import cascading.tuple.Fields; 027 import cascading.tuple.Tuple; 028 029 /** Class Insert adds literal values to the Tuple stream. */ 030 public class Insert extends BaseOperation implements Function 031 { 032 /** Field values */ 033 private final Tuple values; 034 035 /** 036 * Constructor Insert creates a new Insert instance with the given fields and values. 037 * 038 * @param fieldDeclaration of type Fields 039 * @param values of type Object... 040 */ 041 @ConstructorProperties({"fieldDeclaration", "values"}) 042 public Insert( Fields fieldDeclaration, Object... values ) 043 { 044 super( 0, fieldDeclaration ); 045 this.values = new Tuple( values ); 046 047 if( !fieldDeclaration.isSubstitution() && fieldDeclaration.size() != values.length ) 048 throw new IllegalArgumentException( "fieldDeclaration must be the same size as the given values" ); 049 } 050 051 public Tuple getValues() 052 { 053 return new Tuple( values ); 054 } 055 056 /** @see Function#operate(cascading.flow.FlowProcess, FunctionCall) */ 057 public void operate( FlowProcess flowProcess, FunctionCall functionCall ) 058 { 059 functionCall.getOutputCollector().add( values ); 060 } 061 062 @Override 063 public boolean equals( Object object ) 064 { 065 if( this == object ) 066 return true; 067 if( !( object instanceof Insert ) ) 068 return false; 069 if( !super.equals( object ) ) 070 return false; 071 072 Insert insert = (Insert) object; 073 074 if( values != null ? !values.equals( insert.values ) : insert.values != null ) 075 return false; 076 077 return true; 078 } 079 080 @Override 081 public int hashCode() 082 { 083 int result = super.hashCode(); 084 result = 31 * result + ( values != null ? values.hashCode() : 0 ); 085 return result; 086 } 087 }