/*
 * 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 table;

import java.util.Collections ;
import java.util.Iterator ;
import java.util.List ;

import com.hp.hpl.jena.sparql.core.Var ;
import com.hp.hpl.jena.sparql.engine.binding.Binding ;

/** Implementation of a Table as a simple wrapper over an iterator with known columns. */  

public class TableStream implements Table
{
    private Iterator<Binding> rows ;
    private List<Var> vars  ;
    
    public TableStream(List<Var> vars, Iterator<Binding> rows)
    {
        this.rows = rows ;
        this.vars = vars ;
    }
    
    @Override
    public List<Var> vars()             { return Collections.unmodifiableList(vars) ; }

    @Override
    public Iterator<Binding> rows()     { return rows ; }
}