/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* 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 2.1 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.processor.relational;
import java.util.Collections;
import java.util.List;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.core.TeiidComponentException;
public class NullNode extends RelationalNode {
public NullNode(int nodeID) {
super(nodeID);
}
public TupleBatch nextBatchDirect()
throws TeiidComponentException {
this.terminateBatches();
return pullBatch();
}
@Override
public List getOutputElements() {
return Collections.emptyList();
}
public Object clone(){
NullNode clonedNode = new NullNode(super.getID());
super.copyTo(clonedNode);
return clonedNode;
}
}