/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hp.hpl.jena.sparql.algebra;
import java.util.List ;
import com.hp.hpl.jena.graph.Node ;
import com.hp.hpl.jena.sparql.algebra.table.Table1 ;
import com.hp.hpl.jena.sparql.algebra.table.TableEmpty ;
import com.hp.hpl.jena.sparql.algebra.table.TableN ;
import com.hp.hpl.jena.sparql.algebra.table.TableUnit ;
import com.hp.hpl.jena.sparql.core.Var ;
import com.hp.hpl.jena.sparql.engine.QueryIterator ;
import com.hp.hpl.jena.sparql.engine.iterator.QueryIterRoot ;
public class TableFactory
{
public static Table createUnit()
{ return new TableUnit() ; }
public static Table createEmpty()
{ return new TableEmpty() ; }
public static Table create()
{ return new TableN() ; }
public static Table create(List<Var> vars)
{ return new TableN(vars) ; }
public static Table create(QueryIterator queryIterator)
{
if ( queryIterator instanceof QueryIterRoot )
{
queryIterator.close();
return createUnit() ;
}
return new TableN(queryIterator) ; }
public static Table create(Var var, Node value)
{ return new Table1(var, value) ; }
}