/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.ogm.datastore.impl;
import java.util.Collections;
import java.util.Set;
import org.hibernate.ogm.datastore.spi.TupleSnapshot;
/**
* @author Emmanuel Bernard <emmanuel@hibernate.org>
*/
public class EmptyTupleSnapshot implements TupleSnapshot {
public static final TupleSnapshot SINGLETON = new EmptyTupleSnapshot();
private EmptyTupleSnapshot() {}
@Override
public Object get(String column) {
return null;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public Set<String> getColumnNames() {
return Collections.EMPTY_SET;
}
}