/* XXL: The eXtensible and fleXible Library for data processing Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger Head of the Database Research Group Department of Mathematics and Computer Science University of Marburg Germany This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; If not, see <http://www.gnu.org/licenses/>. http://code.google.com/p/xxl/ */ package xxl.core.xxlinq.usecases.ref.linq.pred; import xxl.core.relational.tuples.Tuple; import xxl.core.xxlinq.usecases.ref.linq.column.XXLinqColumn; import xxl.core.xxlinq.usecases.ref.linq.metadata.XXLinqMetadata; public class XXLinqEqualsPredicate extends XXLinqPredicate { private XXLinqColumn leftColumn; private XXLinqColumn rightColumn; public XXLinqEqualsPredicate(XXLinqColumn leftColumn, XXLinqColumn rightColumn) { this.leftColumn = leftColumn; this.rightColumn = rightColumn; } @Override public Boolean invoke(Tuple tuple) { Object left = leftColumn.invoke(tuple); Object right = rightColumn.invoke(tuple); return left.equals(right); } @Override public void setMetaData(XXLinqMetadata metaData) { leftColumn.setMetaData(metaData); rightColumn.setMetaData(metaData); } }